H3 Starter
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=209516
Printed Date: 29 Dec 2025 at 12:14pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: H3 Starter
Posted By: Pgriswd
Subject: H3 Starter
Date Posted: 28 Dec 2025 at 5:59pm
I have a 1961 H3 and it has broken the nose off the starter twice. Does any know of a problem with this and what I can do about it?
Thanks
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Replies:
Posted By: DrAllis
Date Posted: 28 Dec 2025 at 6:03pm
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A bad/worn out ring gear on the flywheel, OR ignition timing set too far advanced, OR BOTH.
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Posted By: Pgriswd
Date Posted: 28 Dec 2025 at 6:30pm
Thanks dr Allis
Will check out both
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Posted By: Les Kerf
Date Posted: 29 Dec 2025 at 9:17am
The mechanical advance mechanism inside the distributor can cause the ignition to be too far advanced during starting if the advance mechanism is sticky due to corrosion and/or worn parts.
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Posted By: Coke-in-MN
Date Posted: 29 Dec 2025 at 9:34am
My 715-B TLB with Perkins engine has broken the nose cone of 3 starters over last 5 years . Seems starter drive was not moving forward far enough to fully engage ring gear -putting strain on outboard bushing in nosecone of starter .
Worn bushings in starter can also allow movement to misalign armature .
Just bought a import starter (NEW) for less than cost of rebuilding the Delco starter again.
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Posted By: Pgriswd
Date Posted: 29 Dec 2025 at 9:46am
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Thanks Les and Coke. I checked the ring gear DR Allis recommended and seems fine. I think I have a timing issue and will work on that next
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Posted By: DrAllis
Date Posted: 29 Dec 2025 at 10:44am
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Things that I take for granted and fail to express. When setting the ignition timing with a timing light, your goal is F-25 or FIRE or 25 degrees BTDC at full throttle. One should always idle down to 400 RPM (after getting timing set) to check the centrifugal advances operation. At very slow idle it should be at or very near TDC. This verifies that the advance is working correctly. Also, the ring gear might look just fine where you looked at it. Every engine stops in one of two places. So, there will be two places of wear, 180 degrees from each other. The rest of the ring gear can and will look very good, but may be very bad in these two suspect places. Don't be deceived until you roll in completely around and look at all of the ring gear.
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