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Topic: Atlas Radiator > Fuel Coolers > Lift Pump Discussion (Read 1415 times) previous topic - next topic

Re: Atlas Radiator

Reply #25 –
Chuck,
Are you saying that the ISM fuel injection pump has no low pressure fuel transfer pump and relies entirely on suction of the gear pump component of the injection pump to bring fuel all the way through 25' or 30' of fuel line? I find that surprising after my experience trying to address my fuel starvation issue. It seems to me that such a design would be very prone to even the most minuscule air leak on the suction side of the fuel supply.
Don.
Quote from: craneman –
No lift pump for my '99 ISM or M-11 which ever it is.
The selected media item is not currently available.
Don & Tys
1999 U270 3602 WTFE #5402
Xtreme Stage 1 w/Headlight, Step Conversion, etc.
2009 Honda Fit Sport with Navi
Freedom is NOT "just another word for nothing left to lose"... with apologies to Kris Kristofferson

Re: Atlas Radiator

Reply #26 –
I guess you could call my priming pump a lift pump. I always referred to it as the primary pump on diesel engines. The ISX is the only schematic I could find. I believe that they would be the same.
Fuel System Cummins ISX15 CM2350 - Electronic Engine - Blog.Teknisi
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Atlas Radiator

Reply #27 –
More research is needed as I don't see the priming pump on pictures of M11's fuel system which can't be copied and pasted.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Atlas Radiator

Reply #28 –
I think the prime pump is integral with the fuel filter
"Riding and rejoicing"
Bob
1997 U320 40' Mid entry, build 5132,  wtbi ce27, 4th owner
2007 Solara convertible
2 prodeco tech outlaw ss electric bikes

1095 watts solar
08 Ls 460 and a sc430
2000 Ford F-250 superduty 4x4

Re: Atlas Radiator

Reply #29 –
My priming pump is part of the primary fuel filter.
Peter and Frieda Morin
1999 36ft. U320 Foretravel
Build # 5436
1998 Suzuki Sidekick Sport

Re: Atlas Radiator

Reply #30 –
I guess my question would be whether or not the priming pump you are referring to is running when the coach is going down the road or whether the injection pump has help once the engine is running. In other words, if you were to put a fuel pressure gauge just before the injection pump while the engine is running, is there a vacuum or is there a positive pressure ahead of the injection pump. Before I did the HD lift pump mod on our coach, such a gauge would have registered between 5 and 15 psi when you turn the key on (which primes the injection pump) and a vacuum 30~45 seconds after the key on event. Now, there is a constant low pressure high volume feed (12.5 psi to 17.5 psi) while going down the road.
Don
Quote from: craneman –
I guess you could call my priming pump a lift pump. I always referred to it as the primary pump on diesel engines. The ISX is the only schematic I could find. I believe that they would be the same.
Fuel System Cummins ISX15 CM2350 - Electronic Engine - Blog.Teknisi
The selected media item is not currently available.
Don & Tys
1999 U270 3602 WTFE #5402
Xtreme Stage 1 w/Headlight, Step Conversion, etc.
2009 Honda Fit Sport with Navi
Freedom is NOT "just another word for nothing left to lose"... with apologies to Kris Kristofferson

Re: Atlas Radiator

Reply #31 –
Don I don't think there is any 12 volt pump that comes on with ignition. Our priming pump is only used for filter changes. Tomorrow I will visually look at the fuel lines on the coach, but my memory says when I did my fuel lines the line from the tank went to the primary filter to the fuel pump inlet then to the secondary filter then to the ecm cooler.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Atlas Radiator

Reply #32 –
Need to change this from radiator to lift pump choices.
96 U270 BUILD 4810
85 380SL
Drummonds TN.

Re: Atlas Radiator

Reply #33 –
It's good to know my radiator would support a M11 engine. 
Robert and Susan
 1995 36' 280 WTBI 8.3 3060r
 1200 watts on the roof, 720 Ah of lithium's
 Build # 4637. Motorcade # 17599
        FMCA  # 451505
        18  Wrangler JLUR

Re: Atlas Radiator > Fuel Coolers > Lift Pump Discussion

Reply #34 –
Quote from: John Haygarth –
Here is the cooler on our 295
Johnh

Interesting thread. Had read about the desirability of the fuel cooler but never took the time to look.  Looks like our 2000 ISC has the same one...either factory or previous owner. 
Randy (N4TDT) and Karen Crete
Sarasota, Florida
SOLD:  2000 U270 34' WTFE Build 5756 "Ole Red"

Re: Atlas Radiator > Fuel Coolers > Lift Pump Discussion

Reply #35 –
Quote from: Don & Tys –
I guess my question would be whether or not the priming pump you are referring to is running when the coach is going down the road or whether the injection pump has help once the engine is running. In other words, if you were to put a fuel pressure gauge just before the injection pump while the engine is running, is there a vacuum or is there a positive pressure ahead of the injection pump. Before I did the HD lift pump mod on our coach, such a gauge would have registered between 5 and 15 psi when you turn the key on (which primes the injection pump) and a vacuum 30~45 seconds after the key on event. Now, there is a constant low pressure high volume feed (12.5 psi to 17.5 psi) while going down the road.
Don
Don the prime pump only runs when requested by operator. There is a control box back in the engine compartment at top. Press the push button and it runs for like 30 seconds. I installed a filter minder on the fuel vent valve to show filter condition. Past screen and first fuel filter. Shows half scale with new filter and old lines. Haven't drove since fuel lines were changed, but hope to take it out this weekend. I'm curious about your fuel cooler. I have the same Aftermarket  brand cooler on my on my Dodge 3500 truck transmission. Very robust cooler
Did your cooler come with the thermostat like mine or without.
Scott