Title: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 02:50:14 pm
Post by: ncaabbfan on August 26, 2011, 02:50:14 pm
Our coach has the Power Tech 8KW generator with the Isuzu 3LB1 diesel engine. I started it up a few days ago to exercise it. I turned on one of the air conditioner units for load.
After it ran a very short period of time, the engine sounded like it was cycling down as if more fuel was needed or it was trying to climb a hill in too high a gear. It would cycle down until I thought it was about to die then come back up to the normal operating sound. This happened fairly frequently and when the engine cycled down, the indicator lightes in the Power Watch panel and the Heart remote panel would go out. Then when the engine would cycle back to a normal operating sound, the indicator lights would be lighted again. This happened fairly frequently.
I checked the circuit breakers/fuses in the front wall under the bed and they were all in the ON position. I checked the two (35A and 50A) circuit breakers on the Power Tech control panel and they were both in the ON position. I checked the 6A fuse and it appeared to be OK except for rust on one of the end caps and the end caps being loose so they would turn. I purchased replacement fuse and installed it today and stared the jenny back up.
The jenny ran fine for a while under Air Conditioning load then started cycling again. When it cycles down, sometimes it kills the AC and sometimes not, but normally causes the indicator lights in the Power Watch panel and the Heart remote panel to go out.
Sometimes the cycling down would cause the EMS to drop out also and sometimes it did not.
I was afraid to allow the air conditioner to continue taking the power drops, so I turned the air conditioner off. The jenny was running with no electrical load on it. It still cycled some, but not as frequently as when the air conditioner was turned on.
Last fall, I replaced the jenny engine spin on fuel filter, all fuel supply hoses (except one) on the side of the engine. This spring, I replaced short sections of the fuel supply hose where they bend and were cracked. As far as I know, the jenny worked OK running the air conditioner a few times (approx 6-8 hours) while we were on our trip this spring. I have not replaced the small in-line filter on the right (visible) side of the engine.
Any idea what might be causing the engine to cycle down and then back up? I do not have a manual for the generator, so I cannot check anything other than circuit breakers and fuse on the main panel. But it seems strange that the air conditioner operating would be causing the jenny engine to cycle down and then back up. Also, without the air conditioning load, the engine still cycles occasionally.
After it ran a very short period of time, the engine sounded like it was cycling down as if more fuel was needed or it was trying to climb a hill in too high a gear. It would cycle down until I thought it was about to die then come back up to the normal operating sound. This happened fairly frequently and when the engine cycled down, the indicator lightes in the Power Watch panel and the Heart remote panel would go out. Then when the engine would cycle back to a normal operating sound, the indicator lights would be lighted again. This happened fairly frequently.
I checked the circuit breakers/fuses in the front wall under the bed and they were all in the ON position. I checked the two (35A and 50A) circuit breakers on the Power Tech control panel and they were both in the ON position. I checked the 6A fuse and it appeared to be OK except for rust on one of the end caps and the end caps being loose so they would turn. I purchased replacement fuse and installed it today and stared the jenny back up.
The jenny ran fine for a while under Air Conditioning load then started cycling again. When it cycles down, sometimes it kills the AC and sometimes not, but normally causes the indicator lights in the Power Watch panel and the Heart remote panel to go out.
Sometimes the cycling down would cause the EMS to drop out also and sometimes it did not.
I was afraid to allow the air conditioner to continue taking the power drops, so I turned the air conditioner off. The jenny was running with no electrical load on it. It still cycled some, but not as frequently as when the air conditioner was turned on.
Last fall, I replaced the jenny engine spin on fuel filter, all fuel supply hoses (except one) on the side of the engine. This spring, I replaced short sections of the fuel supply hose where they bend and were cracked. As far as I know, the jenny worked OK running the air conditioner a few times (approx 6-8 hours) while we were on our trip this spring. I have not replaced the small in-line filter on the right (visible) side of the engine.
Any idea what might be causing the engine to cycle down and then back up? I do not have a manual for the generator, so I cannot check anything other than circuit breakers and fuse on the main panel. But it seems strange that the air conditioner operating would be causing the jenny engine to cycle down and then back up. Also, without the air conditioning load, the engine still cycles occasionally.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dan Stansel on August 26, 2011, 02:53:58 pm
Post by: Dan Stansel on August 26, 2011, 02:53:58 pm
Did you replace the inline fuel filter?? Hard to see but next the the small electric pump.
Mine was still original and I had no ideal that it was a filter. DAN
Mine was still original and I had no ideal that it was a filter. DAN
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Bill Willett on August 26, 2011, 02:55:33 pm
Post by: Bill Willett on August 26, 2011, 02:55:33 pm
Remove the fuel pump output hose, unhook the power lead to pump and apply 12 volts and check fuel pump output into a clean container,also check the pre pump strainer.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Paul Smith on August 26, 2011, 03:01:36 pm
Post by: Paul Smith on August 26, 2011, 03:01:36 pm
On my gen the inline filter is shown in the top photo on this page:
Kathleen & Paul Smith's RV Travelblog (http://www.lazydazers.com/index.cfm?fa=ShowItem&ID=3097)
It's just to the left of the small white fuel pump at the bottom of the photo.
NAPA 3046. $3.99
best, paul
Kathleen & Paul Smith's RV Travelblog (http://www.lazydazers.com/index.cfm?fa=ShowItem&ID=3097)
It's just to the left of the small white fuel pump at the bottom of the photo.
NAPA 3046. $3.99
best, paul
Quote
Did you replace the inline fuel filter?? Hard to see but next the the small electric pump. Mine was still original and I had no ideal that it was a filter.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Pierce & Gaylie Stewart on August 26, 2011, 03:19:21 pm
Post by: Pierce & Gaylie Stewart on August 26, 2011, 03:19:21 pm
Follow Bill's advice in the above post first. 99% sure that it is a fuel supply problem. You have a hose, fitting, or something letting air in the system or a clogged filter(s). Did you replace ALL the fuel filters? Sometimes easy to find problem, sometimes hard if it is the hose off of the top of the tank. Easy to run the generator off of a container of fuel with just a small filter between the container and the electric lift pump to eliminate all other possibilities. If you have the needle shut off valve, tighten the nut around the adjustment needle. Mine was leaking, letting air in and dripping diesel on the generator mount when I bought it. Mine has this valve, Bill Chaplin's does not on an almost identical rig.
Does not take much to make it act like the symptoms you describe.
Does not take much to make it act like the symptoms you describe.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 03:37:03 pm
Post by: ncaabbfan on August 26, 2011, 03:37:03 pm
Did you replace the inline fuel filter?? Hard to see but next the the small electric pump.
Mine was still original and I had no ideal that it was a filter. DAN
I have not replaced any inline filter. The only inline filter I can see is located in a hose that goes up from between what I think is the front (right) injector pump and the middle injector pump up and connects to the engine just below the other fuel hose.
Remove the fuel pump output hose, unhook the power lead to pump and apply 12 volts and check fuel pump output into a clean container,also check the pre pump strainer.
I presume the fuel pump on my jenny is mounted on the base plate just below the oil filter. The fuel hose comes from the tank to the back end of the generator and turns and goes to what I think is the fuel pump. It is a vertically mounted rectuangular unit that has a power wire coming from the generator control box and a ground wire fastened to the base plate. The fuel hose connects to a barb on a hex shaped device and the hex shaped device continues through the vertically mounted rectangular unit. The output fuel hose then goes from the hex shaped device to the fuel filter.
Where is the pre-pump strainer?
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 03:52:19 pm
Post by: ncaabbfan on August 26, 2011, 03:52:19 pm
Follow Bill's advice in the above post first. 99% sure that it is a fuel supply problem. You have a hose, fitting, or something letting air in the system or a clogged filter(s). Did you replace ALL the fuel filters? Sometimes easy to find problem, sometimes hard if it is the hose off of the top of the tank. Easy to run the generator off of a container of fuel with just a small filter between the container and the electric lift pump to eliminate all other possibilities. If you have the needle shut off valve, tighten the nut around the adjustment needle. Mine was leaking, letting air in and dripping diesel on the generator mount when I bought it. Mine has this valve, Bill Chaplin's does not on an almost identical rig.
Does not take much to make it act like the symptoms you describe.
I have only replaced the main fuel filter, a spin on filter mounted vertically just to the left (behind) the oil fill.
The only inline filter I see is the very small, plastic unit in the hose that goes up from between what I think is the front (right) injector pump and the middle injector pump up and connects to the engine just below the other fuel hose.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 04:00:07 pm
Post by: ncaabbfan on August 26, 2011, 04:00:07 pm
On my gen the inline filter is shown in the top photo on this page:
Mine does not have the same inline filter shown in your picture. The fuel hose connects to a hexagonal shaped device that goes to or through a vertical rectangular device I think is the fuel pump. A hexagonal shaped device goes out from the other side of the vertical rectangular device a very short distance and the fuel hose goes from that point up to the spin on fuel filter.
Would there be a filter or screen inside the hexagonal shaped device on the input side of the vertical rectangular device? I have not checked that at all.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave M (RIP) on August 26, 2011, 07:39:15 pm
Post by: Dave M (RIP) on August 26, 2011, 07:39:15 pm
In addition to the fuel subject, I would be thinking the a/c compressor might have a bad capacitor, not starting, and tripping the breake in the a/c unit.. Might try with the other a/c unit to see if anydifference.
As always, just a guess when you cant see or hear it.
As always, just a guess when you cant see or hear it.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Grover Dickerson on August 26, 2011, 07:47:52 pm
Post by: Grover Dickerson on August 26, 2011, 07:47:52 pm
I had the same problem with my 98 U270 about a year ago. I had to replace the fuel supply line. Just a suggestion for a possible quick fix, you might cut off an inch or two of the incoming fuel line and reattach. If the line is bad it is most likely near the connection. Just a thought.
Grover
98 U270
Grover
98 U270
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 07:54:07 pm
Post by: ncaabbfan on August 26, 2011, 07:54:07 pm
In addition to the fuel subject, I would be thinking the a/c compressor might have a bad capacitor, not starting, and tripping the breake in the a/c unit.. Might try with the other a/c unit to see if anydifference.
As always, just a guess when you cant see or hear it.
After running the jenny for a while today, I thought I should shut it down to prevent damaging the air conditioner any due to the low/dropped power.
After shutting down the jenny, I reconnected the 30A AC power to the coach from our house outlet. After waiting a few minutes for the transfer switches to work, I turned on the air conditioner unit. It seemed to work fine. I left the air conditioner unit on for 2 hours or so and it seemed to be working fine (still warm (85 degrees) inside the coach, but it was 103 again here today) and the indicator lights on both the Power Watch panel and the Heart remote panel were lighted. So I presume the air conditioner is working OK. Is this a logical presumption?
I plan to disconnect the fuel hose and remove what I think is the fuel pump (in same location as the fuel pump shown in the top picture referenced in Paul Smith's post (if the temperature allows me to work outside). That will allow me to check it in some manner to hopefully see if it has a screen inside the inlet that needs to be cleaned.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 07:59:44 pm
Post by: ncaabbfan on August 26, 2011, 07:59:44 pm
I had the same problem with my 98 U270 about a year ago. I had to replace the fuel supply line. Just a suggestion for a possible quick fix, you might cut off an inch or two of the incoming fuel line and reattach. If the line is bad it is most likely near the connection. Just a thought.
Grover
98 U270
This spring I cut off approx. 2 or 3 inches of the fuel supply hose as it was cracking at the bend where it came around the back of the generator. But I will double check the hose clamps to make sure none are loose to allow air to be pulled in the hose. I have not seen any evidence of diesel fuel dripping on the base plate or engine mounts anywhere around the right (front) side of the engine.
BTW, do you have an inline filter of any kind upstream of your fuel pump similar to the one in Paul Smith's picture referenced in his post? If not, do you have any kind of inline filter or screen upstream of your fuel pump? If so, what do you have and where is it located?
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: MAZ on August 26, 2011, 08:52:52 pm
Post by: MAZ on August 26, 2011, 08:52:52 pm
I have a 99 U270 with I think the same generator. I experienced the same problem last Feb. It was the inline filter that is screwed onto the lift pump that was clogged and restricting the flow. In my picture it is the gold looking filter on the input side of the gray square pump at the bottom of the picture. Cheap at NAPA as was mentioned earlier. Hope this helps.
Regards, Mark
Regards, Mark
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Grover Dickerson on August 26, 2011, 08:54:25 pm
Post by: Grover Dickerson on August 26, 2011, 08:54:25 pm
Most likely you will not have a fuel drip if you have a bad hose, but it will suck air as the fuel pump tries to pump fuel.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 09:34:19 pm
Post by: ncaabbfan on August 26, 2011, 09:34:19 pm
I have a 99 U270 with I think the same generator. I experienced the same problem last Feb. It was the inline filter that is screwed onto the lift pump that was clogged and restricting the flow. In my picture it is the gold looking filter on the input side of the gray square pump at the bottom of the picture. Cheap at NAPA as was mentioned earlier. Hope this helps.
Regards, Mark
The picture you posted of the front (right) side of your Isuzu 3LB1 engine looks just like ours...except ours does not have the small inline filter just upstream of the hexagonal device that goes into the rectangular device (fuel pump??). Our fuel hose connects directly to the hexagonal device that extends to the left of the rectangular device (I presume fuel pump??).
Is there by any chance a filter or screen inside the hexagonal unit? If so, I can remove the device to see if it is restricted any.
The only inline filter I can find on our jenny is the small circular inline filter that is visible at the top of the picture in the hose that connects to the engine between the front (first) and middle (second) injector pumps. Could that inline filter possibly be plugged up and causing the problem? I did not replace it when I replaced the spin on fuel filter last fall. And we only have around 14 hours on the engine since I changed the oil, oil filter and fuel filter last October.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dan Stansel on August 26, 2011, 10:20:25 pm
Post by: Dan Stansel on August 26, 2011, 10:20:25 pm
The original inline filter does not stand out and appears to be part of the connecting hose.
It is painted gray just like everything else. I never thought it was the inline filter until MOT replaced it. It is about two inches long. DAN
It is painted gray just like everything else. I never thought it was the inline filter until MOT replaced it. It is about two inches long. DAN
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 10:28:15 pm
Post by: ncaabbfan on August 26, 2011, 10:28:15 pm
I had the same problem with my 98 U270 about a year ago. I had to replace the fuel supply line. Just a suggestion for a possible quick fix, you might cut off an inch or two of the incoming fuel line and reattach. If the line is bad it is most likely near the connection. Just a thought.
Grover
98 U270
Did you replace the fuel supply hose yourself? If so, what hose did you use and how did you do it? Did you also replace the fuel return hose or just the fuel supply hose?
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 26, 2011, 10:39:38 pm
Post by: ncaabbfan on August 26, 2011, 10:39:38 pm
The original inline filter does not stand out and appears to be part of the connecting hose.
It is painted gray just like everything else. I never thought it was the inline filter until MOT replaced it. It is about two inches long. DAN
On ours, a 90 degree elbow is threaded into the octagonal piece and the fuel supply hose connects directly to this 90 degree elbow.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: MAZ on August 27, 2011, 12:06:51 am
Post by: MAZ on August 27, 2011, 12:06:51 am
Morris,
I think that small disc like filter that is on mine also is attached to the low pressure return lines If understand it correctly. They are not where the injectors receive there fuel supply from. The hex device and the square device is all the fuel pump. I totally disassembled mine to clean it once. There is a plunger inside of there that vibrates back and forth inside the coil to pump the fuel. I don't remember there being any other screens filters inside the pump. Disconnecting the hose at the screw on filter and putting it in a container is a good way to check that you have good fuel flow. If you don't have a battery to run the pump on you can just press the start button, watch for fuel flow and the stop the start cycle before it tries to start. That's what I did anyways. Hope this is helpful.
Regards, Mark
I think that small disc like filter that is on mine also is attached to the low pressure return lines If understand it correctly. They are not where the injectors receive there fuel supply from. The hex device and the square device is all the fuel pump. I totally disassembled mine to clean it once. There is a plunger inside of there that vibrates back and forth inside the coil to pump the fuel. I don't remember there being any other screens filters inside the pump. Disconnecting the hose at the screw on filter and putting it in a container is a good way to check that you have good fuel flow. If you don't have a battery to run the pump on you can just press the start button, watch for fuel flow and the stop the start cycle before it tries to start. That's what I did anyways. Hope this is helpful.
Regards, Mark
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Jerry Whiteaker on August 27, 2011, 01:47:36 pm
Post by: Jerry Whiteaker on August 27, 2011, 01:47:36 pm
Morris,
I think your setup is very similar to mine. I replaced the generator fuel hoses and posted how I did it. Generator Fuel Line (http://www.foreforums.com/index.php?topic=9248.msg40971#msg40971) If the previous shortcut does not work try a search on the forum for "Generator Fuel Line". Yahoo message number 41836. I used the same expensive hose that Foretravel used, but if I was doing it again, I would just use a good fuel hose suitable for diesel fuel. The aeroquip hose works with special barbed brass fittings that do not need clamps, the hose is just pushed on. To remove the old hose it is slit lengthwise and this must be done carefully if you want to reuse the barbed fitting. You may not find a barbed fitting at the generator and a clamp will need to be used. I think it is done this way to allow generator removal and reinstall without cutting off a piece of the hose. Buy at least 32' of hose, the supply hose is shorter than the return hose. Do the supply hose first, it is the hardest. Good Luck.
I think your setup is very similar to mine. I replaced the generator fuel hoses and posted how I did it. Generator Fuel Line (http://www.foreforums.com/index.php?topic=9248.msg40971#msg40971) If the previous shortcut does not work try a search on the forum for "Generator Fuel Line". Yahoo message number 41836. I used the same expensive hose that Foretravel used, but if I was doing it again, I would just use a good fuel hose suitable for diesel fuel. The aeroquip hose works with special barbed brass fittings that do not need clamps, the hose is just pushed on. To remove the old hose it is slit lengthwise and this must be done carefully if you want to reuse the barbed fitting. You may not find a barbed fitting at the generator and a clamp will need to be used. I think it is done this way to allow generator removal and reinstall without cutting off a piece of the hose. Buy at least 32' of hose, the supply hose is shorter than the return hose. Do the supply hose first, it is the hardest. Good Luck.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Jerry Whiteaker on August 27, 2011, 01:59:03 pm
Post by: Jerry Whiteaker on August 27, 2011, 01:59:03 pm
Morris,
I just reread my old post. I was thinking that the engine and generator pickup were both near the center of the tank, but maybe not I'm not sure of that. Positive that the engine supply is near the center of the tank, not sure about the generator now. Anyway work back from the generator and you will find out. One of the hoses is longer than the other. It is also possible that Foretravel could change the arrangement after they built mine.
I just reread my old post. I was thinking that the engine and generator pickup were both near the center of the tank, but maybe not I'm not sure of that. Positive that the engine supply is near the center of the tank, not sure about the generator now. Anyway work back from the generator and you will find out. One of the hoses is longer than the other. It is also possible that Foretravel could change the arrangement after they built mine.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: amos.harrison on August 27, 2011, 04:20:55 pm
Post by: amos.harrison on August 27, 2011, 04:20:55 pm
Morris,
Remember that what everyone is calling the fuel pump is actually a lift pump supplying individual high pressure fuel pumps at each injector. It is possible for the genny to run(badly) with a weak or failed lift pump. Feed the lift pump from a container, and feed the output line back to the container. If flow is weak or non-existent, check the in-line filter everyone is talking about. If it's OK replace the lift pump. Get a US made one with a 8-13psi rating. I got mine from NAPA. I also bought a clear in-line filter so I can see fuel flow and also the filter element.
Remember that what everyone is calling the fuel pump is actually a lift pump supplying individual high pressure fuel pumps at each injector. It is possible for the genny to run(badly) with a weak or failed lift pump. Feed the lift pump from a container, and feed the output line back to the container. If flow is weak or non-existent, check the in-line filter everyone is talking about. If it's OK replace the lift pump. Get a US made one with a 8-13psi rating. I got mine from NAPA. I also bought a clear in-line filter so I can see fuel flow and also the filter element.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Barry & Cindy on August 27, 2011, 10:08:44 pm
Post by: Barry & Cindy on August 27, 2011, 10:08:44 pm
That "small disc like filter" may be a one-way check valve and not a filter.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Bill Willett on August 28, 2011, 08:36:20 am
Post by: Bill Willett on August 28, 2011, 08:36:20 am
The small disc filter is actually the crankcase ventilation check valve.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on August 29, 2011, 08:29:00 pm
Post by: ncaabbfan on August 29, 2011, 08:29:00 pm
Morris,
Remember that what everyone is calling the fuel pump is actually a lift pump supplying individual high pressure fuel pumps at each injector. It is possible for the genny to run(badly) with a weak or failed lift pump. Feed the lift pump from a container, and feed the output line back to the container. If flow is weak or non-existent, check the in-line filter everyone is talking about. If it's OK replace the lift pump. Get a US made one with a 8-13psi rating. I got mine from NAPA. I also bought a clear in-line filter so I can see fuel flow and also the filter element.
FACET ELECTRIC FUEL PUMPS from Aircraft Spruce (http://www.aircraftspruce.com/catalog/eppages/facetpumps.php)
This web page lists various FACET pumps. The FACET 40106 (12 V, Neg Ground, 4 to 6 psi max, 30 GPH, 1/8 x 27 internal pipe ports is the closest I see to the recommended 8-13 psi rating. However, a FACET 40171 (12 V Neg. Ground, 3.5 - 2 psi max, 15 GPH, 1/8 x 27 internal pipe ports) has been mentioned as a proper lift pump for the Isuzu 3LB1 diesel engine.
Is it better to get the FACET 40106 (4 - 6 psi max, 30 GPH) or the FACET 40171 (3.5 - 2 psi max, 15 GPH) for the Isuzu 3LB1 diesel engine? Or is a different FACET pump better?
Thank you.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave M (RIP) on August 29, 2011, 08:51:53 pm
Post by: Dave M (RIP) on August 29, 2011, 08:51:53 pm
The Facet 476459E will be our last pump you will ever need. Google for best prices $50.00 area
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on September 12, 2011, 04:47:23 pm
Post by: ncaabbfan on September 12, 2011, 04:47:23 pm
I was able to do some work on this issue today. I got an inline fuel filter that I could see the fuel flow. After installing the inline fuel filter and running the genny a few minutes, it looked like air bubbles were coming in the filter with the fuel. I ran it for 30 minutes or so and it started to stumble. So it looks like I will have to replace the fuel supply line to the generator.
I will be run a hose from the generator to a tank of fuel to confirm it does not have any air bubbles in it.
I will be run a hose from the generator to a tank of fuel to confirm it does not have any air bubbles in it.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Pierce & Gaylie Stewart on September 12, 2011, 06:51:39 pm
Post by: Pierce & Gaylie Stewart on September 12, 2011, 06:51:39 pm
Dave's Facet is OEM on a lot of generators and is a great pump. My 10K on my U300 and the old Onan on my 1984 SOB have one that still works great.
I have noticed that some Power Tech 8Kw do have a different pump but the same Facet brand. A small square pump that mounts down on the generator frame. If yours looks like the photo, it is available at: Facet-Purolator FEP12SV Cube Universal Low-Pressure Solid-State Fuel Pump, (http://www.google.com/products/catalog?q=Facet+fuel+pump&hl=en&prmd=ivns&resnum=3&bav=on.2,or.r_gc.r_pw.&biw=1355&bih=632&um=1&ie=UTF-8&tbm=shop&cid=820345320908693629&sa=X&ei=64luTvnFIazUiAL_0634Bg&ved=0CFwQ8wIwAQ#ps-sellers)
Clones are available but for $50, Facets are excellent quality.
Could change over to the big one without much work if so inclined.
Both pumps are about the same price. Have to say, the tall one is certainly more impressive. Does size matter?
I have noticed that some Power Tech 8Kw do have a different pump but the same Facet brand. A small square pump that mounts down on the generator frame. If yours looks like the photo, it is available at: Facet-Purolator FEP12SV Cube Universal Low-Pressure Solid-State Fuel Pump, (http://www.google.com/products/catalog?q=Facet+fuel+pump&hl=en&prmd=ivns&resnum=3&bav=on.2,or.r_gc.r_pw.&biw=1355&bih=632&um=1&ie=UTF-8&tbm=shop&cid=820345320908693629&sa=X&ei=64luTvnFIazUiAL_0634Bg&ved=0CFwQ8wIwAQ#ps-sellers)
Clones are available but for $50, Facets are excellent quality.
Could change over to the big one without much work if so inclined.
Both pumps are about the same price. Have to say, the tall one is certainly more impressive. Does size matter?
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave M (RIP) on September 12, 2011, 07:25:05 pm
Post by: Dave M (RIP) on September 12, 2011, 07:25:05 pm
Pierce, Gotta mention that Facet is/has been a problematic pump, not real dependable in our experience, replaced many including a plastic/PVC model Facet. The original design was Bendix, and a great pump, about 25 years a go Facet purchased the Bendix pump line, and seems they have kept the old original design pretty much in tact, but also came up with some new, cheaper designs including the one you mentioned plus the PVC body type, both have been less then wonderful in our experience.
My original square body Facet pump that came on my 10 kw Power Tech also failed, I had an old Bendix on the shelve, so installed it, still going great, it is only about 30 years old, took it off an old Onan the I junked.
As usual FWIW Been there, done that , ;D
My original square body Facet pump that came on my 10 kw Power Tech also failed, I had an old Bendix on the shelve, so installed it, still going great, it is only about 30 years old, took it off an old Onan the I junked.
As usual FWIW Been there, done that , ;D
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave M (RIP) on September 12, 2011, 07:32:27 pm
Post by: Dave M (RIP) on September 12, 2011, 07:32:27 pm
Forgot to mention, I mounted the replacement round tube type, using the same mounts on the floor of the Power Tech, used barb fittings, new hose. Point is it works great laying down, usually it is mounted vertical.
In this case Size don't matter, it all in the head. :)
In this case Size don't matter, it all in the head. :)
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Pierce & Gaylie Stewart on September 12, 2011, 08:00:19 pm
Post by: Pierce & Gaylie Stewart on September 12, 2011, 08:00:19 pm
Dave,
Come to think of it, the fuel pump was painted blue on the Onan so it could have been/probably was a Bendix. Thats the kind we bought as kids. Think they were about $16 then and they did last forever. Guess you were right about the little square one (see below). Good idea mounting the bigger one flat.
ncaabbfan:
Would check the fuel pump for an internal air leak before replacing the hose to the tank. Plug the intake with a finger and use something like a Mityvac on the output side to see if it holds a vacuum. The square one I installed on my 7.3 conversion failed. Still pumped but leaked diesel and let air in.
Come to think of it, the fuel pump was painted blue on the Onan so it could have been/probably was a Bendix. Thats the kind we bought as kids. Think they were about $16 then and they did last forever. Guess you were right about the little square one (see below). Good idea mounting the bigger one flat.
ncaabbfan:
Would check the fuel pump for an internal air leak before replacing the hose to the tank. Plug the intake with a finger and use something like a Mityvac on the output side to see if it holds a vacuum. The square one I installed on my 7.3 conversion failed. Still pumped but leaked diesel and let air in.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Don from Va on September 12, 2011, 10:02:13 pm
Post by: Don from Va on September 12, 2011, 10:02:13 pm
Hello Morris,
If you decide its necessary to replace your generator fuel hoses you might benefit from some lessons I learned when I recently replaced them on our 1998 U-270. I'm sure you've read all the very helpful posts, however there seems to be lots of differences between year models. I suspect that your 1997 is like our 1998 (w/build number of 5330) and if it is, this should help:
Before starting the job, I raised the coach as high as possible and blocked the suspension for safety. I purchased a 12 volt fuel transfer pump from tractor Supply and pumped the fuel tank empty (in my case about 100 gallons) into two 50 gallon skid tanks.
From driver's side, I carefully removed the fiberglass panel that covers the end of the fuel tank by cutting the silicone around the edges of the panel and around the filler neck. The panel was also heavily siliconed to the tank, so I had to work slowly by pulling gently and using pry bars between the panel and the fuel tank so I would not to crack the fiberglass. Once the panel was removed I sawed out and discarded the two black ABS pipes which vent the battery compartment (the pipe is two inch and readily available at big box stores and is easy to install w/silicone during reassembly). I could then see two return fittings, I removed the return hose at the generator and used air pressure to determine which was for the generator. I purchased 50' of 300 psi premium fuel hose from NAPA with the understanding that I would return the unused hose (I didn't want to risk pulling in a new hose and finding it too short). As others have suggested I then attached the new hose to the old hose using a 3/8" bolt w/head removed and covered it w/electrical tape. I choose to pull from the fuel tank to the generator. I then tried to pull the hose and it wouldn't move; I found that behind the step the generator fuel lines were bundled with heater hoses, etc. and I had to remove a large retaining clamp to free the hoses. Before I forget, I should mention that I found it impossible to re-install the clamp after the new hoses were in place and rather than using the original bolt I installed a stud in the mounting hole, I could then "hang" the clamp in place and secure with a washer and nut. I allowed extra hose at the tank in order to make gentle bends and allow some slack in the hose.
From the passenger side I removed and tagged the fuel sender wires and secured them out-of-the-way. I then removed the front door struts and propped the door full open, removed the bottom and front compartment trim pieces (I had to cut the seal at corners, but that easily remedied with silicone during reassembly). Next I removed the six tank mounting bolts (three each side) and raised one side of the tank at a time with a pry bar and placed 3/4 inch wood shims under the tank so the tank would slide. Then from the drivers side I pushed the tank half-way out of the passenger side compartment stopping before any strain was placed on the large fuel hose which supplies the coach engine. I could then reach and remove the generator suction fuel line which is located in the center of the tank. I pulled the new line from tank to generator and reused the original hose end as I did on the return line.
After replacing/refilling the fuel tank everything tested okay, so it was just a matter of putting everything back together. I worked on the job for two days (probably about 10 hours total) and the cost was about $125 not including the fuel transfer pump.
If you decide its necessary to replace your generator fuel hoses you might benefit from some lessons I learned when I recently replaced them on our 1998 U-270. I'm sure you've read all the very helpful posts, however there seems to be lots of differences between year models. I suspect that your 1997 is like our 1998 (w/build number of 5330) and if it is, this should help:
Before starting the job, I raised the coach as high as possible and blocked the suspension for safety. I purchased a 12 volt fuel transfer pump from tractor Supply and pumped the fuel tank empty (in my case about 100 gallons) into two 50 gallon skid tanks.
From driver's side, I carefully removed the fiberglass panel that covers the end of the fuel tank by cutting the silicone around the edges of the panel and around the filler neck. The panel was also heavily siliconed to the tank, so I had to work slowly by pulling gently and using pry bars between the panel and the fuel tank so I would not to crack the fiberglass. Once the panel was removed I sawed out and discarded the two black ABS pipes which vent the battery compartment (the pipe is two inch and readily available at big box stores and is easy to install w/silicone during reassembly). I could then see two return fittings, I removed the return hose at the generator and used air pressure to determine which was for the generator. I purchased 50' of 300 psi premium fuel hose from NAPA with the understanding that I would return the unused hose (I didn't want to risk pulling in a new hose and finding it too short). As others have suggested I then attached the new hose to the old hose using a 3/8" bolt w/head removed and covered it w/electrical tape. I choose to pull from the fuel tank to the generator. I then tried to pull the hose and it wouldn't move; I found that behind the step the generator fuel lines were bundled with heater hoses, etc. and I had to remove a large retaining clamp to free the hoses. Before I forget, I should mention that I found it impossible to re-install the clamp after the new hoses were in place and rather than using the original bolt I installed a stud in the mounting hole, I could then "hang" the clamp in place and secure with a washer and nut. I allowed extra hose at the tank in order to make gentle bends and allow some slack in the hose.
From the passenger side I removed and tagged the fuel sender wires and secured them out-of-the-way. I then removed the front door struts and propped the door full open, removed the bottom and front compartment trim pieces (I had to cut the seal at corners, but that easily remedied with silicone during reassembly). Next I removed the six tank mounting bolts (three each side) and raised one side of the tank at a time with a pry bar and placed 3/4 inch wood shims under the tank so the tank would slide. Then from the drivers side I pushed the tank half-way out of the passenger side compartment stopping before any strain was placed on the large fuel hose which supplies the coach engine. I could then reach and remove the generator suction fuel line which is located in the center of the tank. I pulled the new line from tank to generator and reused the original hose end as I did on the return line.
After replacing/refilling the fuel tank everything tested okay, so it was just a matter of putting everything back together. I worked on the job for two days (probably about 10 hours total) and the cost was about $125 not including the fuel transfer pump.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Jim Frerichs on September 21, 2011, 06:10:21 pm
Post by: Jim Frerichs on September 21, 2011, 06:10:21 pm
Hi guys,
Does anyone know where the 8 KW gen auto-start board is located for a '98 U270? And if it is under the front cabinet, how doyou remove that? Adjustment instructions would be helpful as well.
Jim
Does anyone know where the 8 KW gen auto-start board is located for a '98 U270? And if it is under the front cabinet, how doyou remove that? Adjustment instructions would be helpful as well.
Jim
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Gary Bouland (RIP) on September 21, 2011, 07:12:53 pm
Post by: Gary Bouland (RIP) on September 21, 2011, 07:12:53 pm
Jim, On a 10KW Isuzu that I am familiar with the auto start board is in the control box that contains the ES52 controller etc.that is mounted on the Generator at the right end. May be different on an 8.
Gary B
Gary B
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave M (RIP) on September 21, 2011, 09:04:05 pm
Post by: Dave M (RIP) on September 21, 2011, 09:04:05 pm
Jim, I do not know if your autostart control is like mine in the 2001 320 as in my coach the module is on the floor under the bottom of the compartment behind the swing out door under center of dash. It is the Dyna Gen BCM 12 module, it is a battery voltage sensor, that starts the generator when the batteries drop to a predetermined level, then charges. All the parameters are adjustable, if you have a good digital volt meter, it is not a complicated task to check or set.
The instructions are available, do asearch on this forum, for the BCM 12, you will find the info. As I mention, I have no clue what your setup is.
Glld luck
Dave
The instructions are available, do asearch on this forum, for the BCM 12, you will find the info. As I mention, I have no clue what your setup is.
Glld luck
Dave
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on September 22, 2011, 11:29:14 pm
Post by: ncaabbfan on September 22, 2011, 11:29:14 pm
I was able to do some work on this issue today. I got an inline fuel filter that I could see the fuel flow. After installing the inline fuel filter and running the genny a few minutes, it looked like air bubbles were coming in the filter with the fuel. I ran it for 30 minutes or so and it started to stumble. So it looks like I will have to replace the fuel supply line to the generator.
I will be run a hose from the generator to a tank of fuel to confirm it does not have any air bubbles in it.
Just to update this issue. I found the generator ran smoothly when I supplied fuel from a separate tank and a different hose connected to the suction side of the pump.
So I purchased 40 feet of hose to replace the supply and return hoses. I was able to route the supply hose from the generator to the tank without major issues other than I had to run the hose outside of the raceway.
The big issue I had was accessing the connection on the top of the tank. It is about mid way on the tank and extremely difficult to access. Our tank was at least 3/4 full, so I was not going to be able to move the tank in any manner.
I found that if I wedged myself between the tank and the propane tank I could just barely reach the connection. I purchased the crows foot wrench set and using it, I was able to disconnect the connector from the tank. I was not able to see the fitting on the tank from either side of the coach due to the cables and hoses that went across the top of the tank right over the fitting.
Then I had to insert the new connector in the end of the new hose and try to line up the connector with the fitting on the tank. Since I could not see the fitting from either side of the coach, I had to totally do it by feel with the tips of my fingers and try to rotate the connector at the same time. After several hours of trying, I finally was able to line up the hose connector with the tank fitting and rotate the connector to screw it on the fitting. I was able to tighten the connection with my finger tips using the crows foot wrench.
Due to the very cramped location, I had to come out of the compartment every 10-15 minutes to relax and recover some...then force myself back in between the two tanks to try again.
After finishing the installation of the supply hose, I then replaced the return hose. It was much easier as the access to the return fitting on the tank was very easy to access and was very easy to see.
After completing the change out of both hoses, I ran the generator for around 1 1/2 hours and ran thee air conditioner for 1 hour or greater. The engine ran smoothly and did not stumble in any manner. A day or two later, I ran the generator and the air conditioner again for around another hour and the generator engine ran very smoothly with no stumbling at all.
While taking out the old hoses, I found cracks and some leaks in both hoses. So they definitely needed to be replaced.
I just wish the generator supply fitting and the drive engine supply fitting had been placed 12-15 inches closer to the passenger side of the coach. I believe I could have seen the fitting and I would have had much easier access to it also.
I want to thank every one for the suggestions provided. They helped me very much in determining the problem and how to approach correcting the problem.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Michelle on September 22, 2011, 11:36:04 pm
Post by: Michelle on September 22, 2011, 11:36:04 pm
I found that if I wedged myself between the tank and the propane tank I could just barely reach the connection.
Due to the very cramped location, I had to come out of the compartment every 10-15 minutes to relax and recover some...then force myself back in between the two tanks to try again.
Morris,
Congrats on doing the job yourself. One of Steve's and my favorite posted pics is one from Jerry Whiteaker on his genset fuel line replacement
Pretty much says it all, doesn't it?
Michelle
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on September 22, 2011, 11:49:56 pm
Post by: ncaabbfan on September 22, 2011, 11:49:56 pm
Morris,
Congrats on doing the job yourself. One of Steve's and my favorite posted pics is one from Jerry Whiteaker on his genset fuel line replacement
Pretty much says it all, doesn't it?
Michelle
Thank you.... I actually checked to see if I could slide in similar to the way Jerry did. But unfortunately, I am not as slender as he is. So I had to try something different. I am SOOOO glad it is completed.
And as I said, the suggestions and comments here allowed me to determine what the likely problem was. As it turned out, both hoses were cracked and starting to leak slightly.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Kent Speers on September 23, 2011, 09:13:46 am
Post by: Kent Speers on September 23, 2011, 09:13:46 am
Morris, nice job. Welcome to the world of contortionism. That's a technical therm in the motorhome world.
I was wondering if you might have noticed if the hoses near the tank itself were cracked. I had presumed that since they were in a protected compartment they may not deteriorate as quickly. If that were the case maybe the old lines could be cut a couple of feet away from the tank and spliced into the new lines. If so, one wouldn't have to strain to reach the connectors on top of the tank precluding the need to join the contortion team. What do you think?
I was wondering if you might have noticed if the hoses near the tank itself were cracked. I had presumed that since they were in a protected compartment they may not deteriorate as quickly. If that were the case maybe the old lines could be cut a couple of feet away from the tank and spliced into the new lines. If so, one wouldn't have to strain to reach the connectors on top of the tank precluding the need to join the contortion team. What do you think?
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: George Stoltz on September 23, 2011, 09:19:20 am
Post by: George Stoltz on September 23, 2011, 09:19:20 am
Morris, nice job. Welcome to the world of contortionism. That's a technical therm in the motorhome world.
I was wondering if you might have noticed if the hoses near the tank itself were cracked. I had presumed that since they were in a protected compartment they may not deteriorate as quickly. If that were the case maybe the old lines could be cut a couple of feet away from the tank and spliced into the new lines. If so, one wouldn't have to strain to reach the connectors on top of the tank precluding the need to join the contortion team. What do you think?
Kent! Kent!!!
I was just talking with your surgeon and he said you are NOT to attempt to make this fuel line replacement on your own. He said to lean on your friends.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Kent Speers on September 23, 2011, 09:50:45 am
Post by: Kent Speers on September 23, 2011, 09:50:45 am
George, have you been talking to Peggy? No, I did not intend on doing it myself. I am campaigning to get Steve and Michelle to stop by on their return from Sana Fe. I have several projects that need tending to.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: George Stoltz on September 23, 2011, 09:53:04 am
Post by: George Stoltz on September 23, 2011, 09:53:04 am
George, have you been talking to Peggy? No, I did not intend on doing it myself. I am campaigning to get Steve and Michelle to stop by on their return from Sana Fe. I have several projects that need tending to.
Now you're thinking properly.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Gayland Baasch on September 23, 2011, 10:42:55 am
Post by: Gayland Baasch on September 23, 2011, 10:42:55 am
Why have I not heard of anyone replacing the hose(s) to the main engine?
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave Head on September 23, 2011, 10:56:07 am
Post by: Dave Head on September 23, 2011, 10:56:07 am
Bigger hose deteriorates slower. Less and larger bends.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave M (RIP) on September 23, 2011, 11:53:59 am
Post by: Dave M (RIP) on September 23, 2011, 11:53:59 am
Gayland, If your referring to the fuel hoses on the generator vs the main engine fuel hoses, It is MY OPINION and experience there is a major difference in quality in the hoses, the hoses on the generator are normally the quality used on small engines, cheap and simple to replace. The hoses on the main engine are of a much higher quality and durability. They use fittings crimped on. I do not know what the main difference is, however most large engines contain a wire structure internal along with other long life materials, unseen on the normal small engine hoses. You can purchase the same quality fuel lines in the small size, but be ready for a major difference in price due to the crimped fittings, these are not secured with a hose clamp.
As usual, you get what you pay for , IF YOUR LUCKY.
FWIW
As usual, you get what you pay for , IF YOUR LUCKY.
FWIW
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Rick on September 23, 2011, 12:03:11 pm
Post by: Rick on September 23, 2011, 12:03:11 pm
Why have I not heard of anyone replacing the hose(s) to the main engine?
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Bill Willett on September 23, 2011, 12:50:01 pm
Post by: Bill Willett on September 23, 2011, 12:50:01 pm
When I replaced my gen hose,I replaced it with Lawrence Marine Nova Flex, approved for under deck placement,with a 2 hr. burn rating from Amazon Hose and Rubber Co. ^.^d
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Kent Speers on September 23, 2011, 01:17:44 pm
Post by: Kent Speers on September 23, 2011, 01:17:44 pm
Why have I not heard of anyone replacing the hose(s) to the main engine?I suspect it is the concentrated heat in the gen compartment that deteriorates the hose as you will find that most of the cracking is within the compartment itself. The hose beyond the closed compartment looked fine when I replaced mine. I have used the left over good hose sections on a variety of equipment with no problems.
I had suspected that most of the cracking was on the generator end. Is there a reason one cannot just splice into the good line outside of the generator compartment thereby eliminating the need to crawl into the fuel bay? Also, I don't recall hearing of the cracked fuel lines occurring on the older model Grand Villas. Any ideas on that one? Of course that could just be my feeble memory.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Gary Bouland (RIP) on September 23, 2011, 01:41:16 pm
Post by: Gary Bouland (RIP) on September 23, 2011, 01:41:16 pm
Kent, When my Kubota PT10 acted up I replaced the fuel line and that cured it. The line looked good but had a wet spot just where it passed thru the bulkhead that separates the generator bay from the fuel tank bay. It was difficult but I was able to reach the fitting on the top of the tank without pulling the tank.
Gary B
Gary B
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Kent Speers on September 23, 2011, 01:53:29 pm
Post by: Kent Speers on September 23, 2011, 01:53:29 pm
Gary, would it have be practical to disconnect the hose from the fuel pump. Attach a new section of hose via a barbed splice ( see photo here - 3/8 Hose Barb Splice, Brass BEGi (http://www.bellengineering.net/product_info.php?products_id=566)) and pull it through to the fuel bay side then cut off the bad part of the old hose and again splice in the new hose to the good section of the old hose and pull it back through to the generator bay. This would eliminate the contortion of the body to hook the new line up to the fuel tank. I am presuming your generator is right behind the drivers front wheel as mine is.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Dave Head on September 23, 2011, 02:04:13 pm
Post by: Dave Head on September 23, 2011, 02:04:13 pm
Its occurred on a few GVs. You should be able to splice - its not under pressure. If you splice and the problem doesn't go away though...
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Gary Bouland (RIP) on September 23, 2011, 04:22:49 pm
Post by: Gary Bouland (RIP) on September 23, 2011, 04:22:49 pm
Kent, That's what I did. I used a stud that fit tightly in the hose ends, taped it over and pulled hose thru bulkhead. Took a while to work it thru and I was working in the dirt yard of a relative in E CO. I had cut hose to remove it from the barbed fitting on tank so when I replaced it I used a clamp to secure it. I used standard fuel hose for it, expensive hose used by FT was not available.
Gary B
Gary B
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on September 23, 2011, 09:14:09 pm
Post by: ncaabbfan on September 23, 2011, 09:14:09 pm
Morris, nice job. Welcome to the world of contortionism. That's a technical therm in the motorhome world.
I was wondering if you might have noticed if the hoses near the tank itself were cracked. I had presumed that since they were in a protected compartment they may not deteriorate as quickly. If that were the case maybe the old lines could be cut a couple of feet away from the tank and spliced into the new lines. If so, one wouldn't have to strain to reach the connectors on top of the tank precluding the need to join the contortion team. What do you think?
Hi Kent,
First of all, I HOPE you are getting along well and are much closer to normal....whatever normal is.....
Now, to answer your questions. I didn't really check the old supply hose where it connected to the fitting on the tank. After I got the old supply hose out of the coach, I cut off the end of the hose with the barbed fitting in it and we put the hose in the trash so it would go out that day. So I cannot say for sure for the supply hose. BUT I did see a few cracks in the old return hose where it slid over the barbed fitting to connect to the fitting on the tank. In fact, a couple of weeks ago, I put some tape around the return hose to cover those cracks and a couple of days later the tape was falling off.
So I would guess the old supply line wasn't in very good condition at the tank end either. The only differences I see in the portion of the hoses in fuel compartment vs. the rest of the hose is the hose outside (forward) of the fuel compartment and the raceway can be exposed to water and dirt from the road as well as possibly some more heat right at the generator engine. But the places where I did find cracks in the supply line were behind where the hose comes out of the generator compartment and were where it was bent to go through a clamp.
Since I did see some cracks in the surface of the old return hose where it slid over the barbed fitting to connect to the tank fitting, and considering the condition of the old supply hose in a few other locations, I don't think I would want to leave a section of either old hose in place. I think it would be just a matter of time before the old section would have to be replaced anyway and I look at it that I wouldn't be doing it any younger than I am now.....
Plus the supply hose on our coach went right into the bundle of hoses and cables that are routed over the tank. So access to the supply hose is still not very good there either.
If we could have removed the propane tank easily, I think it would have made the job much easier on our coach. But there was no way my wife and I could remove/reinstall the propane tank.
I used a hydraulic hose with a working pressure rating of 2610 psi, a nitrile tube and 1 high tensile steel wire braid at a cost of $1.47 per foot plus sales tax. I had to cut it with a hacksaw, but if you have a steel wheel cutting blade for a cutting tool of some sort, it should cut very easily. Inserting the flare fitting in the hose was quite a job...but it can be done to connect with the supply fitting on the tank. Since I knew what size flare fitting was required to connect to the return fitting on the tank, I had the supplier install a crimp-on fitting ($5.29 plus sales tax) on one end of the return hose so that simplified that portion of the job a lot.
I also purchased 2 each 3/8 ID 90 degree brass elbows with barbs on both ends so I did not have to bend either hose around the generator to connect to the bulkhead connector just upstream of the lift pump.
I am guessing materials cost around $90.00-$100.00 for the entire project.
I am very glad this project is done.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Kent Speers on September 23, 2011, 09:37:32 pm
Post by: Kent Speers on September 23, 2011, 09:37:32 pm
Thanks for your concern and for the recap. It sounds like that fix will last for many years now.
Be careful, you know once you get everything fixed and updated on your coach you will have to sell it and get a new one. I think it is a cosmic law or something.
Be careful, you know once you get everything fixed and updated on your coach you will have to sell it and get a new one. I think it is a cosmic law or something.
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: ncaabbfan on September 23, 2011, 09:43:57 pm
Post by: ncaabbfan on September 23, 2011, 09:43:57 pm
Thanks for your concern and for the recap. It sounds like that fix will last for many years now.
Be careful, you know once you get everything fixed and updated on your coach you will have to sell it and get a new one. I think it is a cosmic law or something.
I hope it is the last time I have to worry about replacing these hoses.
Lol!!! I don't think I am too worried about getting everything done....with nothing more to do.....
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Lewis Anderson on September 24, 2011, 10:13:50 am
Post by: Lewis Anderson on September 24, 2011, 10:13:50 am
Kent, when the generator on my 96/270 would not run for more than 20 seconds, I replaced the fuel hoses inside the generator compartment using barbed "joiners" and clamps two years ago. Has worked reliably since then. I dislike having "strangers" work on my coach and there was no way that even half of me could get to the fuel tank connections....
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Kent Speers on September 24, 2011, 12:24:09 pm
Post by: Kent Speers on September 24, 2011, 12:24:09 pm
Thanks for the confirmation. I think I will try the easy way first if I should start having problems. I know I shouldn't say this but so far, so good. Our generator is running fine right now.
Relax Steve!!!
Relax Steve!!!
Title: Re: Power Tech 8KW generator w/ Isuzu 3LB1 diesel engine
Post by: Barry & Cindy on September 24, 2011, 01:31:52 pm
Post by: Barry & Cindy on September 24, 2011, 01:31:52 pm
RE "Why have I not heard of anyone replacing the hose(s) to the main engine?"
Several years ago we replaced all fuel hoses including tank to Racor filter & injector pump return to tank as well as tank to generator & return back to tank. We did not pull a new hose when we removed the old hose. Old hose came out so we could make a new length and it was easy pull the new hose from tank to gen.
With hoses off, we put a ball valve on input to Racor to help prevent the long fuel line from tank to Racor from draining out when we change Racor fuel filter.
Several years ago we replaced all fuel hoses including tank to Racor filter & injector pump return to tank as well as tank to generator & return back to tank. We did not pull a new hose when we removed the old hose. Old hose came out so we could make a new length and it was easy pull the new hose from tank to gen.
With hoses off, we put a ball valve on input to Racor to help prevent the long fuel line from tank to Racor from draining out when we change Racor fuel filter.