D82u pony motor problems.

Good evening all,

I recently pulled my pony motor off the cat to replace the clutch discs one was gone and the other was dead. It was fairly straightforward the only real problem I had is I couldn’t get the cap screws that held the transmission in so I split at clutch and transmission. After that I replaced the clutch discs cleaned everything up and with fresh gaskets I put it all back together. Refilled the oil and thought I was good to go. She started like normal first pull of the handle all was normal ran for about 3-5 mins and then went to engage the clutch it was slipping and not fully engaging so I shut it down as I didn’t want to have a massive wreck I was getting some smoke out of the clutch inspection/adjustment hole. I also had some smoke coming from the inspection plate for the valves which was new. Nothing besides the exhaust was hot though. I let it set till this morning and then went back to try it again made the adjustment to the clutch and that’s when I realized I couldn’t budge the pony with the hand crank. I then proceeded to bar it over on the flywheel and got it to turn you can use the handle to get it to rotate now but it still really difficult like your not going to spin it to start. I did verify clutch engagement when it’s out the main engine fan doesn’t turn over when engaged it turns over. The only other thing I found was that hand crank housing was low on oil and obviously the pinion is engaged on the cat. I’m stumped because other then the clutch she ran like a champ before this. Sorry for the long post thanks

Probably, I am not awake this morning yet. So help me sort this out a bit. Which clutch is slipping, pony motor benedicts?, or master clutch?

You got the pony to turn with a bar? Or the diesel engine?

My go to thought is the benedicts is engaged and you're trying to turn the diesel as well as pony. But your answers to my questions could mean I am not looking in the right places.

Pony clutch needed replaced I did that and now the pony is hard to turn over after initial start that was normal re adjusted clutch now lots of resistance to spinning over the pony motor it’s super stiff. I even backed the clutch all the way off it doesn’t seem to make a difference.

You have managed to engage the starter pinion so now you are attempting to crank both pony and main engine.

To release the pinion you need to get access to the pinion latches. How to get access depends on the tractor s/n. Early unit access is by removing the engagement lever housing, later units by removing the upper clutch cover. Latest units my require removal of the whole pony motor assembly.

When you have access to the latches you need to bump the adjustment screw end of one of the geared together latches to get them to release.

Old magnet would there still be resistance even if the pony motor clutch is not engaged?

No, not normally.

I’m afraid after cleaning the years of gunk out of the pony maybe something got lodged in oil passage or something and now I need to do a tear down.

Just a silly thought,

the new pony clutch plate would be thicker than the old worn one and will set in the pony flywheel splines in a different spot. If the old plate wore grooves in the flywheel splines and/or old hardened clutch plate dust is still in said splines the new plate could be jammed in the splines--cannot slide freely-- so it could cause drag by being partly engaged and so not to spin freely.

Maybe it is possible that the spigot bearing rollers have dislodged in the pony flywheel/crankshaft end and are being crushed against the end of the pony pinion drive shaft, thus causing excessive end load on the pony crank thrust bearing and the end of the pony pinion drive shaft--end result is like the clutch is part engaged and the pony hard to turn with said drag trying to drive the pinion drive shaft and the main engine. The pinion shaft will seem to be driven by virtue of said jammed parts.

Cheers,

Eddie B.

I’m Hopeful it’s something simple going to pull It back off this weekend after I maneuver it closer to The shop.

Are you sure the key is in the pressure plate hub?