Seeking some advice,
I have a late D2 with factory direct electric start. Starter was working fine when I brought it in the shop last January to do steering clutches, brakes, and bevel shaft bearings.
As part of that teardown I removed the starter in order to access the equalizer spring bolt... gave the starter shaft a shot of fluid film where the gear slides and put it on the shelf.
Nine months later I install the starter on the tractor and and it won't spin the diesel engine over... it whirrs, it seems to engage, and you can see the engine fan try to move, but not spin over.
If I engage the compression release it will spin the engine over... disengage the compression release and no go.
So I take it to the local auto elecrtic shop who has worked on these starters before and does a lot of work on heavy equipment starters and generators... he bench tests it and says it"s working fine, must be a solenoid or wiring problem on the tractor.
I take it home and put it on the tractor and jump directly from the battery to the starter bypassing the solenoid, switch and wiring... no dice, doesn't work.
So next I remove the starter and put it on another tractor with the same results... I then take the starter from the 2nd tractor and put it on the original tractor it it starts just fine... which confirms that it original starter is at fault, and not any other kind of problem with the tractor.
Back to the auto electric shop where I explain my testing and results. He agrees to look into it further.
Two days later I pick it up... he had taken it apart, armature tests good, every thing else looked good, and he replaced the brushes since he was in there even though he said they looked fine. Bench tests good.
I take it home. put it on, same result as before... it whirrs, trys to turn the fan, but no go.
I'm stumped, as I'm sure is the auto electric guy.
If the starter is ok electrically, is there something in the drive end that could be causing slippage ???
Thanks for taking time to read this, and any help you can provide, Wayne