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Topic: Fuel pathway for '92 36' Grand Villa w/8.3 250 hp Cummins (Read 441 times) previous topic - next topic

Fuel pathway for '92 36' Grand Villa w/8.3 250 hp Cummins

Recent new owner. Would someone walk me thru fuel path. Had wet fuel line connected to filter on passenger side(with plastic sedament bowl]. Replaced line. Does fuel go next to lift pump(thru the smaller line out of the filter}? Am I correct in assuming this is the fuel/water separator? Drove the coach on 60mi trip a week of so ago - ran as new.
next day, started ran@ ten seconds, shut down & would not start again. discovered  the large hose connected to it wet. Next day, same symptom. Will try later today with fuel shutoff solenoid removed & linkage zip tied counter clockwise. It's cold outside....waitin' on my helper. Yesterday, we had fuel into the injector pump but none at the injectors.

I think? the fuel goes from the water separator to the lift pump, to the screw on filter on the block & on to the injector pump? See, I told you I was a recent new owner!

Thanks much,

Jim
'92 Grand Villa 36' w/8.3Cummins mechanical
ORED
Build#4062

Re: Fuel pathway for '92 36' Grand Villa w/8.3 250 hp Cummins

Reply #1 –
It's alive!! Don;t have a clue why the hose leaked and the fuel shutoff buggered up at the same time....
Thanks for looking at this, folks. Still would like to be reassured that I have the fuel pathway correct.

Jim
'92 Grand Villa 36' w/8.3Cummins mechanical
ORED
Build#4062

Re: Fuel pathway for '92 36' Grand Villa w/8.3 250 hp Cummins

Reply #2 –
Quote from: Jim Sizemore –
I think? the fuel goes from the water separator to the lift pump, to the screw on filter on the block & on to the injector pump? See, I told you I was a recent new owner!
Jim,

Yes, that is the setup on our '93 U280.  Our first (primary?) filter, mounted on the frame above the starting batteries (curb side), has a water drain fitting.  This is the "coarse" filter - takes out the big chunks.  Then fuel goes to lift pump, then to the "fine" (secondary?) filter mounted on the block, then to the injection pump.

Unless you know for sure the filters are fresh, I would go ahead and change them, so you have a known "baseline".  Check all the fuel hose fittings for proper tightness.  Your lift pump should have a "manual priming pump" button that can be used to fill the lines up to the injection pump.  Operate the hand pump until you hear the overflow valve "squeak" - then you know the lines are filled.

Photo below: original lift pump, and new replacement.  Manual priming pump is the black rubber bellows thingy.










1993 U280 SE 40' WTBI, Build: 4359
C8.3 300hp, 6-Speed, Exhaust Brake
960 watts on the roof (6 x 160)
Sorento (or BOLT) on a Kar Kaddy SS
"Nature abhors a vacuum"

Re: Fuel pathway for '92 36' Grand Villa w/8.3 250 hp Cummins

Reply #3 –
Correct-- primary is the first fuel filter/water separator, then lift pump, then secondary (fine) fuel filter, then injection pump.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020
 

Re: Fuel pathway for '92 36' Grand Villa w/8.3 250 hp Cummins

Reply #4 –
Thanks, folks, for the replies. The coach starts before you can let the switch go. My nephew made the boot for the shutoff solenoid from the "good finger" of a kitchen black rubber glove. Turned out too tight - made the next one from the thumb...Works as new. I'm learning(for instance, If you don't know whether you have self bleeders and decide to crack the injector nut - do it under a rag!!

Gonna make a few short runs around this area before hitting the road. If all is kosher, going south...

Thanks again,

Jim
'92 Grand Villa 36' w/8.3Cummins mechanical
ORED
Build#4062