Hydraulic fan motor with small leak

Topic: Hydraulic fan motor with small leak (Read 2570 times) previous topic - next topic

Re: Hydraulic fan motor with small leak

Reply #25 – August 20, 2013, 06:48:43 pm

I hope yours are OK. They look a lot like mine. I plan not to be concerned until it starts throwing or dripping oil.

Re: Hydraulic fan motor with small leak

Reply #26 – August 20, 2013, 08:20:39 pm

Ditto. Has looked the same for 60,000 miles and 7 years.

Re: Hydraulic fan motor with small leak

Reply #27 – August 20, 2013, 09:44:29 pm

When I first noticed the drip on the ground we were having the two of grandkids fly in for a 10 day 1,500 mile vacation so didn't want to get caught without this motor...It is made only for Foretravel....Long story short....if I return it to FOT I pay a 20% restocking charge ....$600.00....I'll just hold onto it for a while longer...Also, it was the last one they had in stock and they must be ordered from England, custom made....If anyone needs one quick, let us know...

Re: Hydraulic fan motor with small leak

Reply #28 – August 20, 2013, 09:55:11 pm

George ---- Part of your decision making info on when to do something can be gained from checking your power steering fluid level as that is the sys. that provides hydraulic fluid to run the cooling fan. Keep an eye on that level and don't get caught without steering. Chances are that you will have enough time for a trip, just keep some power steering fluid on board. ---- Fritz

Re: Hydraulic fan motor with small leak

Reply #29 – August 20, 2013, 10:10:03 pm

Quote from: fkjohns6083 – August 20, 2013, 09:55:11 pm

George ---- Part of your decision making info on when to do something can be gained from checking your power steering fluid level as that is the sys. that provides hydraulic fluid to run the cooling fan. Keep an eye on that level and don't get caught without steering. Chances are that you will have enough time for a trip, just keep some power steering fluid on board. ---- Fritz

Fritz,

In the 2003 coaches like George's, the hydraulic fluid is 15W40 motor oil

cummins-isl-400hp-belts-filters-hoses-for-foretravel

Re: Hydraulic fan motor with small leak

Reply #30 – August 20, 2013, 10:18:35 pm

I do check the hydraulic oil reservoir sight glass every morning before we start out, along with the oil, belts, and coolant level. I have yet to notice the level is low by the sight glass.

Re: Hydraulic fan motor with small leak

Reply #31 – August 20, 2013, 11:04:23 pm

Quote from: George Hatfield – August 20, 2013, 10:18:35 pm

I do check the hydraulic oil reservoir sight glass every morning before we start out, along with the oil, belts, and coolant level. I have yet to notice the level is low by the sight glass.

I see that the sight glass is present, but I always check with the dipstick in the top of the reservoir. When the seal failed in our power steering, I was adding a quart of Delo 15W40 to the reservoir every 200 miles. I ran eight quarts through the system by the time we got to FOT for repair. What a mess!

The failure was during cold weather. I thought we might be able to operate without the hydraulic system, so I pulled the belt to the hydraulic pump and tried to drive the coach. I made four right turns while driving around a shopping center. Unless you have the strength of "Arnold" in his prime, don't try it. My shoulders were sore the next day from the short drive.

If you have leaking seals, it will be messy, but you can probably drive to a repair facility. Keep at least a gallon of oil at hand for the engine and the hydraulic system.

Re: Hydraulic fan motor with small leak

Reply #32 – August 21, 2013, 10:21:35 am

Michelle ---- Thanks for that info., I'll double check my 91 paper work and make sure that it is power steering fluid for my rig. I dont have a sight glass on my 91, just the dip stick. I'm quite sure that it is power steering fluid ---- As I remember, it was a reddish fluid that puddled on the pavement when I found my leak. Thanks again ---- Fritz

Re: Hydraulic fan motor with small leak

Reply #33 – August 21, 2013, 11:01:08 am

Thanks for all the advice! I think I will just keep an eye on the motors for the time being. I did check the dipstick on the hydraulic oil reservoir and it is full. I have never added any oil to it, although MOT might have last year when we had service. Bottom line is that if there is a leak, it is small. Another thing to keep an eye on!

Re: Hydraulic fan motor with small leak

Reply #34 – August 21, 2013, 12:42:26 pm

George, You might try adding a bottle of seal sealant, much like radiator sealer. I used it til I could get the leaking seal in the pump replaced. Did not stop it completely but it did slow down.
Gary B

Re: Hydraulic fan motor with small leak

Reply #35 – September 12, 2013, 01:20:55 pm

I talked to Mike Rogers at MOT today and he said not to do anything to the motors unless oil is actually dripping from them. He also said they can rebuilt the motors with new seals.

Re: Hydraulic fan motor with small leak

Reply #36 – September 12, 2013, 09:15:39 pm

Quote from: fkjohns6083 – August 21, 2013, 10:21:35 am

Michelle ---- Thanks for that info., I'll double check my 91 paper work and make sure that it is power steering fluid for my rig. I dont have a sight glass on my 91, just the dip stick. I'm quite sure that it is power steering fluid ---- As I remember, it was a reddish fluid that puddled on the pavement when I found my leak. Thanks again ---- Fritz

Our 93's both use regular motor oil. It says so right on the reservoir.

Re: Hydraulic fan motor with small leak

Reply #37 – September 12, 2013, 11:50:33 pm

Yep, that's what it says on our '93.

Pierce

Re: Hydraulic fan motor with small leak

Reply #38 – September 13, 2013, 07:47:45 am

The DDC 2stroke uses 40# oil, I would use th 15W-40 (lighter) oil in the hydraulics, 40 is heavier.

Re: Hydraulic fan motor with small leak

Reply #39 – September 13, 2013, 11:28:35 am

Dave,

Yes, there is a sticker on the canister for 15-40. I should have included that.

Pierce

Re: Hydraulic fan motor with small leak

Reply #40 – September 13, 2013, 12:36:31 pm

Pierce, you may recall that years ago DDA recommended 30# for all 2strokers, later they upped it to the present 40#. In my wild 8v-92 (600+)I ran 50# due to results reported frm a long term experience from a charter bus operator in Denver, who did not want the 6V, so stuck with the 8V and had no more spun rear mains, they are the weak link in he 8V-92.
The 6V does not suffer this issue nearly like the big bro.
Should add, DDC now recommends 50# for the 8V92. Takes reading close to find it.

Re: Hydraulic fan motor with small leak

Reply #41 – September 13, 2013, 05:24:04 pm

Dave,

Our local Chevron dealer picks up cases of Delo 100 #40 from Sacramento and delivers them to the house while on his route. The Delo 100 is also very reasonable priced. Our U300 came with a ton of manuals but no service record of any kind. The last owner was in poor shape but when I asked his wife, she looked at me with that look and said it probably needs some maintenance done. Pretty sure he used the multi grade for the very occasional oil change.

The big worry is with hydraulic reservoir not very far from the engine, many owners will just change oil with the 15-40 after they read the sticker on the cannister. I have looked at accelerated engine wear photos for the cam lobe for the injectors and also the piston skirt. Really show big difference between the multi grade and the straight #40.

I understand the 92 series has the exact same rod bearings as the 71's. Not sure about the mains.

Good to know about the #50 for 8V-92s as there is plenty of room to put one in. I would have to hang out on I-80 on ramps going up Donner Pass on I-80 waiting for new SOBs to come by.

Heating up the solar panels this afternoon so will post results.

Next project is to move the air cleaner into the engine compartment routing the intake out through the stateroom lower cabinet and out above the side radiator. Going to put a small tankless water heater in the old air cleaner compartment with a 12V pump and use it for a winter block heater. Original air cleaner intake is in the worst possible location. At $60, bet they last at least 10X longer away from the rear tires.

Pierce

Re: Hydraulic fan motor with small leak

Reply #42 – September 13, 2013, 05:39:00 pm

Pierce,
If yor concerned about the bottom end bearings, it is a simple matter to drop the oil pan all main bearings are very accessible. The firs to show wear will be the rear main. Reinstalling the pan is a non event. A d the rod and mains are the same on bothn the 71 & 92, part of the reason the 8V-92 is sensitive on the rear mains. Why Most "awake" folks switched to the 50 wt.

Re: Hydraulic fan motor with small leak

Reply #43 – September 13, 2013, 08:58:01 pm

Pierce ---- I've really spent alot of time looking and thinking about how to get my engine air cleaner intake above and away from those rear wheels. The air intake on our 91 GV is behind and just above the rear duals on the navigator side. What I have come up with to date is to route the air intake out thru the shell and up to a reasonable height around the top of the window. I have been trying to design a flat but ample riser that would hug the shell and not look too added on. It would point forward like a scoop and take air in away from the dust from the wheels and the carbon laden exhaust. In the mean time I have just added some filtration to the round air intake cover on the filter element. Nasty little problem and I'm happy to see that you are working on it. (PS-- I also routed the exhaust tail pipe so that it points backwards in lieu of straight out and into the air intake when you're standing at idle) Have a great day ---- Fritz

Re: Hydraulic fan motor with small leak

Reply #44 – September 13, 2013, 09:50:53 pm

Michelle ---- Just to close an open loop, It is dexron power steering fluid (18quarts) that drives the power steering and the side mounted hydraulic cooling fan on our 91 GV. Do you know when they changed to 15W40? Thanks and have a great day ---- Fritz

Re: Hydraulic fan motor with small leak

Reply #45 – September 13, 2013, 09:56:40 pm

Foretravel used different fluids in different years. Our 84 ored had engine oil for the power steering fluid, but when I worked in Tampa for Foretravel there were some years that had dexron for the fluid, so have to look at the fluid and for labels as to which fluid is being used

Re: Hydraulic fan motor with small leak

Reply #46 – September 13, 2013, 10:12:44 pm

Thanks Red Tractor ---- Is that as in IH or Case? I'm green myself as in JD. Have a great day ---- Fritz

Re: Hydraulic fan motor with small leak

Reply #47 – September 13, 2013, 10:22:36 pm

Red as in IH. I was raised on Farmall H and M, but I do have a JD model B

Re: Hydraulic fan motor with small leak

Reply #48 – September 13, 2013, 11:55:39 pm

My 92 uses transmission fluid too.

Re: Hydraulic fan motor with small leak

Reply #49 – September 14, 2013, 10:11:05 am

Quote from: fkjohns6083 – September 13, 2013, 08:58:01 pm

Pierce ---- I've really spent alot of time looking and thinking about how to get my engine air cleaner intake above and away from those rear wheels. The air intake on our 91 GV is behind and just above the rear duals on the navigator side. What I have come up with to date is to route the air intake out thru the shell and up to a reasonable height around the top of the window. I have been trying to design a flat but ample riser that would hug the shell and not look too added on. It would point forward like a scoop and take air in away from the dust from the wheels and the carbon laden exhaust. In the mean time I have just added some filtration to the round air intake cover on the filter element. Nasty little problem and I'm happy to see that you are working on it. (PS-- I also routed the exhaust tail pipe so that it points backwards in lieu of straight out and into the air intake when you're standing at idle) Have a great day ---- Fritz

Fritz,

So many places around here only reachable by dirt/gravel road. In Baja, the dirt is really fine and you can see vehicles really kicking up a dust cloud on the way to see the whales. Many bus conversions have the intake plumbed up to the roof. I would like to keep the stock appearance as much as possible plus we don't ever load all the compartments so can sacrifice some space in the cabinet next to the bed for the air intake PVC pipe. It would be about three feet straight out to the side above the radiator. I would like to make use of the air filter compartment for a tankless water heater just for winter block heating. No 120V power needed, just a small 12V pump.

The air cleaner location along with the radiator in the back are two of my biggest complaints. Lots of wasted space that could have been used for radiators in the nose with no hydraulic pump or motors necessary.

Pierce

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