Starter won't spin

Fatjay · Apr 7, 2015

I think i baked the starter. Previous owner was using 12v battery on 6v starter on super 88, so I did the same. Ran out of fuel, filled up and went to start and after cranking a few seconds it just stopped. Battery terminals get real hot just sitting there.

I tried hooking my jumper up, set it to 6v 150a strait to the starter. Didn't seem to do anything though.

Starter is a 91-01-3658 6v A47. If it is baked, is there a 12v alternative anyone can give me the model number of?

duane o. · Apr 7, 2015

A starter doesn't care whether it's 6volt or 12 volt or positive or negative
ground normally.the charging system dictates what it uses. My Oliver 70 has 12
volt positive ground on a 6 volt starter. It might just have been time for it
to quit.

Fatjay · Apr 7, 2015

Took off the starter and it spun when I hit it with power. I think the motor is stuck... The flywheel is a bit chewed.

Tractor is full of coolant and oil and they both look relatively fresh. Where can I get a wrench on to try and turn. It's a super 88 motor, still not sure if it's a super 88 frame or a 77 frame. Haven't found serial numbers yet.

Married2Allis · Apr 7, 2015

The starter may have spun when you took it off, but that doesn't mean it can turnover the motor after it was cooked. I would concentrate on getting a good starter because you'll need it anyway. If you don't want to put out money for a new one (roughly $225 to $500 and up) and you have the time, you can rebuild the fried one with a kit. The starter may have had a ton of rust and crap that just broke loose when it overheated. Old ones like that also had cloth wiring insulation. Take it apart completely, blast it out with an air compressor and clean the armature and all electrical connections with abrasive and replace the brushes.

chucksoliver77 · Apr 7, 2015

Some times the starter can become locked with the flywheel, put it back on and try it again. Like RR said turn it with a big screw driver through the starter hole then put the starter back on and try again. my 77 used to do that all the time I just put it in 5th or 6th gear and rocked back and forth till it was free and it would start right up. new ring gear solved that problem Chuck

rrlund · Apr 7, 2015

You can probably put a long extension through the crank hole in the center grille strip and put an inch and a eighth socket on the nut on the front of the pulley. Or just use a big screwdriver or tire iron in the ring gear on the flywheel with the starter off.

Fatjay · Apr 7, 2015

Took the plugs out, put the starter on, and it spun like it never stopped. Put the plugs in and it fired up immediately.

J.Wondergem · Apr 7, 2015

Sounds like the starter drive jammed in the teeth.

oliver90owner · Apr 8, 2015

JW is likely spot on. Quite likely no problem with the starter motor but a worn starter ring gear or starter bendix. You might understand that the engine will invariably settle most
often on a compression stroke. 6 pot motors likely are less prone to stopping on the same cylinder as a 4 pot motor. Add in the reduced stopping points and often one or two
places on the ring gear are trashed by the bendix operation (again, not a pronlem wit pre-engaged starters, of course).

Sometimes can be dressed to last a few more years, sometimes flywheels can be turned round (lose timing marks) or a simple replacement of the bendix. Sometimes a problem
arises temporarily, such as in this instance, where terminals are making poor contact. It seems the starter was drawing current (easily checked out), particularly as the terminal
were getting hot. High resistance at terminals means less potential difference available accross the starter.

Yes JW is most likely spot on.

RAB

Starter won't spin

Fatjay

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duane o.

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Fatjay

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Married2Allis

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chucksoliver77

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rrlund

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Fatjay

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J.Wondergem

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oliver90owner

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