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#1
10-20-2010, 04:54 PM
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rebuilding a starter motor
I have a used starter motor that free spins at 9200 rpm (a good sign) but it is making an abnormal noise. Anyone ever take one apart and replace bearings/ brushes and grease it up? Links? pics? Source of parts?
I called a place that rebuilds starters and asked if they load test it after a rebuild. The answer was "no, there is no such thing since there are so many starters out there."
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked 
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#2
10-20-2010, 07:20 PM
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I did one about 10 years ago.
The most important thing is to clean it well. The brushes are replaceable. There is a wire retaining ring under a collar that stops the gear/over run clutch from going too far, it is a PITA to get off. The over run clutch can start to slip. I have pulled one to pieces & roughened the surfaces with emery. Dot use molly based grease on it as it will slip. The bearings are bronze bushes. The plate that the brushes are mounted on is a weakness, make sure it is clean & able to make good electrical contact with the alloy end cover or you will have trouble. The field & rotor windings insulation eventually breaks down & then there is little you can do for it. Hope that helps
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Grumpy Old Diesel Owners Club group I no longer question authority, I annoy authority. More effect, less effort....  1967 230-6 auto parts car. rust bucket. 1980 300D now parts car 800k miles 1984 300D 500k miles  1987 250td 160k miles English import  2001 jeep turbo diesel 130k miles  1998 jeep tdi ~ followed me home. Needs a turbo. 1968 Ford F750 truck. 6-354 diesel conversion. Other toys ~J.D.,Cat & GM ~ mainly earth moving
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#3
10-21-2010, 03:15 AM
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Wagner Alternator
http://www.wagneralt.com/
Family run business,nice guys,very knowledgeable. Reasonable Prices,Fast shipping. (800)345-5927 Starter and Alternator parts and supplies.
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'84 300SD sold 124.128
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#4
10-21-2010, 06:10 AM
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Quote:
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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.  [SIGPIC]..I also have a 427 Cobra replica with an aluminum chassis.
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#5
10-21-2010, 07:58 AM
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Quote:
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85 300D turbo pristine w 157k when purchased 161K now 83 300 D turbo 297K runs great. SOLD! 83 240D 4 spd manual- parted out then junked
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#6
10-22-2010, 02:36 PM
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You'll need the Bosch number off the starter
to order parts.
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'84 300SD sold 124.128
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#7
10-22-2010, 03:56 PM
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I brought the starter to a local rebuilder and he hooked power to it and spun it and said it sounded fine. I asked what they do to test after the rebuild and he said what he just did, by the sound of it free spinning. He said with 30 years experience he can do that. I also asked him if I should replace the brushes and grease the bearings and he said no, just run it.
I still would like to look at how long the brushes are and replace them if worn. Anyone have a procedure (with pics, ideally)? Compress ignite. Thanks for the bushing p/n's. I won't need it this time but it's good future reference when I do. Last edited by funola; 10-22-2010 at 04:18 PM.
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