Drum Brake Shoe Adjuster Cam - Alfa Romeo Bulletin Board & Forums
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post #1 of 6 (permalink) Old 10-17-2018, 09:10 PM Thread Starter
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Drum Brake Shoe Adjuster Cam

How is the the Drum Brake Adjuster Cam assembly removed from the backing plate?
Is it swaged or threaded?
I have everything else removed but this item is just rotating and i don't want to damage anything.
Converting my 57 Spider from front discs back to original 2-shoe drum brakes.
Ulf
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post #2 of 6 (permalink) Old 10-18-2018, 04:06 AM
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Hi Ulf and all,

They look rivetted (clinched).
If there isn't any damage, personally I wouldn't take it apart and give it just a good cleaning by brush. Finding a new pin would be difficult, it would take at least more time than the 10 minutes cleaning.
You could say to reweld it together after having dismanteled it using a grinder but before you do that be sure that the special bushing behind the cam is not made from aluminium and would be damaged by the heat of welding the cam on the pin.
Perhaps someone else knows more about it?
Hope this helps,

Thierry
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post #3 of 6 (permalink) Old 10-18-2018, 07:06 AM
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I agree with Thierry,if they're not worn smooth,dress the notches with a file. If you need new ones and have access to a mig welder,grind the original cams off(easy).New cams are available from Alfastop(have round holes),just be careful welding because the spacers behind the cams are aluminum,or at least not magnetic. I've used the MoProd kit(ebay once in a while) with success,but Rovafarm offers the same set for much less.I have no experience with those.https://www.rovahfarm.com/seriesbrakespage2.htm
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post #4 of 6 (permalink) Old 10-18-2018, 09:40 AM
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Agreed.. the notches don't provide any locking feature . They are just there to give you a feel of how much you have turned them. They don't back off.
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post #5 of 6 (permalink) Old 10-20-2018, 01:01 PM Thread Starter
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Thanks for the info. I will just clean the notches with a file.
Will leave the adjuster assembly mounted when having the Backing Plate powder coated.
Ulf

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post #6 of 6 (permalink) Old 10-20-2018, 01:24 PM
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Quote:
Originally Posted by ubach View Post
Thanks for the info. I will just clean the notches with a file.
Will leave the adjuster assembly mounted when having the Backing Plate powder coated.
Ulf
DO NOT powder coat.. REPEAT DO NOT POWDER COAT !!! There are more brake failures in driveways from powder coating than anything else.. Failure mode is LOCKED brakes... The rear cylinders must slide back and forth when changing from going forward to backward and vice versa. Exuberance is going to cause you a lot of anxiety. Powder coating builds up a thickness where the cylinder is supposed to slide. The cylinder will not slide and your brakes will lock..UNCLE! You can use spray gun on them lightly but no PC. Powder coating is for things like springs .. not everything that is painted on a car.
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