lazy b farms
New member
Needing some help on my 990. For some reason the crankcase is filling with Diesel. Drained nearly 2 and a half gallons out today. Where could it be coming from? Any help would be greatly appreciated.
John Deere 990
- Thread starter lazy b farms
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kennyd
Advertiser
Injection pump seal. I can't look it up now but you can try JDParts: Unsigned Landing Page
Rara Avis
Veteran Member
There are three possible routes for fuel to enter the lubrication system
Fuel lift pump – The diaphragm can split providing a route for diesel to enter the engine crank case.
Injector pump – Injector pump shaft seals have been known to fail.
Damaged Injectors – Leaking injector nozzles during periods of inactivity can drip their contents into the cylinder which then runs down between the piston and bore into the sump.
Fuel lift pump – The diaphragm can split providing a route for diesel to enter the engine crank case.
Injector pump – Injector pump shaft seals have been known to fail.
Damaged Injectors – Leaking injector nozzles during periods of inactivity can drip their contents into the cylinder which then runs down between the piston and bore into the sump.
DLTTrekkers
Veteran Member
and the thermoSTART
OP
lazy b farms
New member
Finally got back on it this afternoon and removed the fuel pump and injection pump. Planning on taking them in to have checked out. I am wondering though if tractor starts and runs good could it still be an Injector? Starts right up every time and smokes very little.
Zebrafive
Super Member
Any update?
