JKM

Anyone got some tips/things to check? Started this winter i assume, but we couldn't tell be because it was cold , but now with temps up , when you try to start the tractor in the morning , it rolls over for an extended period of time before it finally fires (up to 10 seconds), after that first start , it is fine for the rest of the day. Does this sound like an air leak to anyone?

thanks for the help.

Jayme.

wannadiesel

Yes, it sounds like an air leak to me. What pump does the motor have? If it's the inline pump I'd look at the return carefully.

JKM

Nope , VE style pump. filters were changed in the winter , so i suspect one of them, 2 spin ons and one inline , my money is on the inline , give em all a turn tomorrow and tighten the clamps , i hope that helps it.

Hemi Cat

Most likely air getting into the system. Isn't that system gravity fed? Check your oil for diesel. You may have a seal gone on the pump. or the transfer pump.

96_12V

Does it make any differance to give it, say 1/4 to 1/3 throttle while cranking it. Could be that (as an air leak would do) it's bleeding back slightly overnight.

JKM

No , the system is not gravity fed , the fuel tank is under the cab , way below the engine, giving it throttle made no difference.

Tightening the clamps on the lines around the inline filter made everything 20X worse , after sitting for 5 minutes there was a slight delay in the start , after an hour it would crank for 20 seconds sometimes, so i pulled the rubber fuel lines today ( ) replaced them , i'll show you some pictures tomorrow of how bad it got, i think i definetly solved the problem, it worked fine all afternoon , true test will be tomorrow morning.

Pentastar

There is almost certainly a check valve in the fuel line,some of them can be disassembled for inspection and cleaning.I have repaired a Case W20 loader with a Cummins engine with the same symptoms without replacing any parts,just cleaning that check valve. Ron

JKM

No check valve , unless it is in the lift pump or downstream somewhere , replaced the fuel lines yesterday , went out this morning , temp at about 5 deg, no manifold heaters on the tractors , just either, but with no either , hit the key , it rolled the first cylinder over compression , second one came up and she fired off. for a 4 cyl with 7000+ hard hours on it , i think she still starts pretty good, and it is nice knowing my problem is fixed.