John Deere 990

[lazy b farms]

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.

 

[kennyd]

Injection pump seal. I can't look it up now but you can try JDParts: Unsigned Landing Page

 

[Rara Avis]

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.

 

[DLTTrekkers]

and the thermoSTART

 

[lazy b farms]

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]

Any update?