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Jul 02, 2012 6:40 pm
petemick Offline
Member
Registered since: Dec 19, 2010
Location: -


Subject: Starter motor brush holder
Anybody who has battled with very brittle mazak brush holders on V12 engines might like this steel copy we cut from a steel billet. Not cheap but pretty!

Thumbnails of attached images:

Filename: V12 Starter Brush Holder.jpg
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Image size: 448 x 336 Pixels

 

Jul 02, 2012 7:01 pm
h14 Offline
Member
Registered since: Nov 30, 2008
Location: Chalandray, France


Subject: Re: Starter motor brush holder
Nice job...only the V12 starter doesn't have a mazak brush holder. Just checked my spare, & as I thought, Herr Bosch wouldn't stoop so low as to use mazak in his machine. Now, if we're talking Mr Berkshire, now he made a fine mess of the wiper motors with this cr*p metal.
So, next question...what starter motor do you have fitted? The correct original is a Bosch axial starter. Incidentally the brush holder is made up of laminated steel rivetted together.
Laurence
 

Jul 03, 2012 5:29 pm
petemick Offline
Member
Registered since: Dec 19, 2010
Location: -


Subject: Re: Starter motor brush holder
Starter motor numbers from case BJG12/12 RS19 R Bosch A-G might be 6 . Looks like a Bosch motor to me
 

Jul 03, 2012 8:49 pm
h14 Offline
Member
Registered since: Nov 30, 2008
Location: Chalandray, France


Subject: Re: Starter motor brush holder
Hi,
Yes, certainly Bosch. Both my starters are BJH 18/12 RS42, which I understand is the factory equipment. My notes state that the "18" can be another number.
I'd say that yours could be the nearest viable replacement supplied by Bosch once stock ran out...but then I thought mazak fatigue was a pre-war thing. Intriguing. Obviously the important issue is that it starts your engine. Mine simply states "BOSCH" with their symbol; "R Bosch A-G" would indicate a different period of manufacture
I've found Bosch very helpful, although I gather they threw all remaining spares for these starters in the 1970s. They did email me detailed exploded diagrams and parts lists...if you like I can email copies on to you, pm me your email address if so.
A thought...Bosch could probably tell you what the original vehicle/s were fitting your starter...in which case it's just possible the relevant owners club could supply, or know sources of, spares should you need other parts. I'd certainly like to know where to get brushes from for mine!
Laurence
 

Jul 04, 2012 5:02 am
petemick Offline
Member
Registered since: Dec 19, 2010
Location: -


Subject: Re: Starter motor brush holder
Thank you for that , I would certainly appreciate any info you have, my E mail is petemick@fastmail.fm
Whilst surfing last night I found a BJG12/12 RS19 for sale in France. I await a reply.
 

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