M1078 starter rebuild help

[sargentwolf]

My starter decided to stop working. Checked everything out, had a bad battery, still wont start. Took the starter apart and it's toasted. Shaft is warped and there's arcing damage plus rust inside on EVERYTHING. I also snapped off a cover bolt when putting it back together...that's how I found out the shaft is warped....I knew things had been going too well lately.

I'm hunting for a new starter, but going to give it one last hurrah before using this for a boat anchor.

Anyone have any exploded diagrams or the like on the starter? I've tried contacting a few factory authorized part shops but they can't even find the model in their systems. There's a motor repair place that will take a crack at repairing the damaged bits and a new shaft but need more info on assembly/tolerances....I didn't take pics of the disassemble process like an idiot.

Or does anyone have a spare, known good starter they would be willing to sell? Need to have this truck up and running ASAP as its being used for a recruiting event soon.

 

[Suprman]

I have a good used one. I dont know of anyone who rebuilds them. Its considered a Cat part so no cheap replacements around. There are a bunch of cross refs to it though. When I get to work I can look up the numbers.
Will

 

[Rebuilder]

My starter decided to stop working. Checked everything out, had a bad battery, still wont start. Took the starter apart and it's toasted. Shaft is warped and there's arcing damage plus rust inside on EVERYTHING. I also snapped off a cover bolt when putting it back together...that's how I found out the shaft is warped....I knew things had been going too well lately.

I'm hunting for a new starter, but going to give it one last hurrah before using this for a boat anchor.

Anyone have any exploded diagrams or the like on the starter? I've tried contacting a few factory authorized part shops but they can't even find the model in their systems. There's a motor repair place that will take a crack at repairing the damaged bits and a new shaft but need more info on assembly/tolerances....I didn't take pics of the disassemble process like an idiot.

Or does anyone have a spare, known good starter they would be willing to sell? Need to have this truck up and running ASAP as its being used for a recruiting event soon.

What were the symptoms of it going bad? Did it just stop working or were there bad noises involved? Mine clunks 3-4 times before it starts the truck and I'm not sure if it's the starter or something upstream.

 

[Suprman]

There are contacts when the solenoid throws out the bendix that get pitted and burnt out over time. The solenoid contact closest to the block is the positive. Get a clip lead on there jump it to 24v see if its the starter.

 

[sargentwolf]

IronPlanet reported it had intermittent starting issues. It would make a loud grinding noise as well as a whirring noise and would then have to spin down before I could try starting it again. It would usually finally engage correctly on the second or third try and the engine would run just fine.

 

[Suprman]

Could be a bad starter or chipped flywheel

 

[sargentwolf]

So ended up finding a starter locally, got to love truck shops that are staffed by packrats! I think the guy had enough truck parts to build an Auto-bot....

Installing it this weekend when I have help.

And the amount of arcing damage inside the starter makes me very no in reusing this thing. Very certain the starter is bad, I didnt see any teeth chunks inside the bendix housing or on the flywheel (friend brought his cellphone snake camera, 20 bucks on fleabay!)

 

[Overdrive]

Sweet that you found a local starter replacement!