AC 200 Oil dillution

Hey guys, I have a question: Earlier this year, I had to put a new injection pump on my 200 Allis. Since pump replacement, I have ran the tractor roughly 12 hours since repair, but have been gaining oil since the replacement (pump went right after I purchased the tractor from my grandpa with about 1830 hours on the clock, typical governor band failure).

At time of pump repair, the oil was diluted a bit (likely from governor band particles plugging the return per my pump rebuilder, causing it to build internal pressure), so I changed it. I've gained about 1" on the stick since the oil was changed.

I blew out the return lines then, so I have no reason to believe they are plugged currently. Tractor runs smoothly, no excess smoke, so I do not believe the dilution to be an injector issue (they were done roughly 25 hours before I purchased it.. One nozzle broke and grandpa had hem all reworked at that time. I don't know how/why it broke, but I recall him having to put a piston and liner in it, and was re-ringed at that time also.. In the last many years, the tractor only saw a few hours a year pulling seed wagons and the like, so it has been a little while).

I'm guessing I rolled one of the cup seals installing the pump, but looking for your opinions, as I'd think if I rolled a seal it would lose prime sitting, wouldn't it?

Thanks in advance, and sorry for my long post.. figured more details are better.

Brad

It won't loose prime as the other front seal is holding. I'll bet the rear seal is folded over if fuel is in the oil. If NOT fuel may be hydraulic oil from the pump seal. The trick to know the injection pump rear seal is in the pilot tube correctly, pump will slid on easily. Seal is folded over if pump pushes hard to get in place..

Tough to lose prime, as most, if not all of the fuel in the tank is above the pump. I agree, a seal is rolled over.

Thanks guys,

Pulled the pump and sure enough, one of the seals had rolled/torn. It did some damage to the brass sleeve in the pump, but per my local diesel repair place, they told me to try to clean it up with some emory cloth and hope for the best.. I used some coarse stuff first, then some finer, and finished with 1200 grit.. could still feel a small groove, but really need the tractor to pull my baler, so I put it back together with my fingers crossed.

Ran it a few hours before work and the oil don't appear to be growing so far, so hopefully it'll get me through baling straw, then if the tractor is down a few days to get the sleeve replaced it's no big deal (shy of the cost to repair a pump with somewhere in the 10-20 hour range because I most likely got in a hurry the first time, but hey, I do it nice cause I do it twice..)

Brad