2500a backhoe fuel and oil , out of blowby pie

OK It was getting dark when I noticed it, but when I moved the backhoe, while unloading a trailer, I saw a stream of black on teh ground, further examination shows it is coming from the blowby pipe under accelerating power,,

looks like diluted oil , smells like a fuel oil mix,,

what have I done??

is it time for a new injector pump? maybe the fuel leaking through to the oil,, It also stalled and wouldnt start again, almost sounds like its out of fuel,, probably all in teh oil,but it was too dark to check fuel level,

,, help,, hoping for not too costly fix,, but either way it needs to get fixed, I am getting ready to do a few jobs, always something, thansk pat
 
I'd guess 2 items that can cause this--if it has a fuel pump, it can have a leaking diaphragm letting fuel get into the crankcase. If it has an electric pump, this should be over-looked. #2 cause is probably the front seal in the injector pump going out & letting fuel in the crankcase. Either way, turn the fuel off when not being used.
Drain the crankcase & see what's going on in there. Probably clear full of fuel/ oil mix.
 
Hi, I believe the 2500A has the German D-239 Diesel engine same as agricultural model 574.
If it is a D-239 engine then it has a Bosch injection pump and the usuall problem is the front lip seal on the injection pump drive shaft. Possible part number is:
3078355R2 SEAL OIL SEAL, drive shaft.
If you decide to replace the seal yourself, get a service manual, clean everything around the injection pump, precisely mark the location of the injection pump on the mounting plate on timing gear cover. DO NOT LOOSEN the cap screws on the timing drive gear. The pump drive shaft is held by the large nut on the drive shaft.
DO NOT TURN the pump drive shaft, if you turn it, turn it two revolutions or pump will be 180 degrees out of time when it is reinstalled.

Hope this helps
JimB
 

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