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Injection Pumps

U

UP Oliver

Member
Is it possible for an injection pump to leak through the front of a tractor only when the tractor is running?

I have an Oliver 1755 that was slowly leaking all the time last winter whether the tractor was running or not. It leaked along the outside of the tube that goes through the middle of the pump; can't remember the name of that tube. I wonder because I have another tractor I don't use much and the oil level seems to go up a little bit over the course of time. I realize there are other possibilities for that, but I wondered if it only leaks when I run it; if that is possible.

Thanks.
 
Bad injectors can cause fuel to get in the oil s well. They quit spraying a good pattern. They then just spray a stream of fuel into the cylinder. Most of it burns but some does not and goes around the piston rings and into the engine oil.

Had a Ford 4000 that would gain a quart in the oil between changes.
 
Some types of pumps have a rubber cup that seperates the diesel in the pump body from the timing gears. If those seals go bad, the diesel can and will trickle into the crankcase via the timimg gears.
 
That is the pump drive shaft. Has two seals on it. One to keep engine oil from getting into the diesel and one to keep diesel out of the oil. Very common place for a leak. As posted injectors can also leak.
 
If pilot tube was not epoxied in as Stanadyne recomends it can leak between tube OD and housing ID. Shaft seals wear grooves inside tube over time and may need replaced too.
 
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