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Farmall & IHC Tractors Discussion Forum
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Mr. Mackay and Starter Drives

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Slowpoke

10-26-2003 01:43:53




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Speaking of starters, Hugh Mackay, I saw your post a day or two ago about two different starter drives. Today I tried to start my new IH240 just to see if it would run and if the clutch was truley unstuck. I put a good battery on it and it would not turn over; it was like the battery was dead. I found the trouble when I removed the starter and found the gear was in the drive position and I couldn't push it back with my fingers.
It doesn't look like any drive I've seen. Could it be the clutch type drive? If so, do you know if it's repairable by me, or non repairable, and a new one is necessary? Or maybe lack of lubrication?
The I&T manual doesn't cover starters.

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MN Charlie

10-26-2003 05:56:14




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 Re: Mr. Mackay and Starter Drives in reply to Slowpoke, 10-26-2003 01:43:53  
A simple way of identifing the different types of starter drives is the over-running clutch type drive uses a solenoid with a small shift lever to shift the drive into the ring gear. The Bendix drive uses the rotational force from the armature to screw the drive into the flywheel ring gear. The big advantage of the solenoid shifted drive is the gear is not spinning when it is shifted into the ring gear. Where as the Bindex drive is spinning as the gear is being engaged. With that much said there are two different types of Bendix drives. The old true Bendix uses a large coil spring that absorbs the shock and the newer style that most refer to as a clutch uses a compression spring that is encased in a case that looks like the overrunning clutch assembly. These drives are not cheap but they still are a lot cheaper than replacing the whole starter. My 2 cents MN Charlie

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Hugh MacKay

10-26-2003 03:06:20




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 Re: Mr. Mackay and Starter Drives in reply to Slowpoke, 10-26-2003 01:43:53  
Slowpoke: Starter drives for the most part are non-repairable. You may do some things like lubrication, grinding rough edges of teeth, etc. This may well work, but usually only for a short time. The clutch type and I'm not sure that is the proper term. It is the term the CaseIH partsman I deal with uses. In some respects this device resembles the clutch drive on a chain saw. That is not a perfect description but it does come to mind when viewing the two.

Having said this I believe this newer type drive should work better on the 12 volt conversions as they tend to hit quite hard. One must remember, those old bendix type were around for a lot of years also. As to longevity, probably hard to say just yet which is better. I do know that when a tractor is changed to the newer type, starter engagement is much smoother.

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Slowpoke

10-26-2003 22:51:58




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 Re: Re: Mr. Mackay and Starter Drives in reply to Hugh MacKay, 10-26-2003 03:06:20  
I took the starter apart today and it looks like it's been rebuilt with hardly any wear. The good old Bendix is there, but it sticks at full throw and the gear won't return on its own, even after lubing. I know it will return when the engine starts, but if the battery can't turn the engine, the gear will stay engaged with the flywheel.
I also found the wire that goes from the solenoid to the starter windings was overheated and trashed, probably because it's 12 ga stranded wire. If that was part of the rebuild, somebody screwed up.

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