Author Topic: Rear brake assembly  (Read 2914 times)

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Offline JonathanJoy

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Rear brake assembly
« on: 04 Nov 2011 at 15:15 »
Hi I've recently brought a 37 250 Aero. There was no rear brake assembly but it did come with the following plate.  Question is it the right part ? If so what else do I need.  I've noticed some machines appear to have an aluminium plate. I've an exploded diagram of the assembly so I definitly need the brake drum to go with it, any help would be much appreciated.

Kind Regards Jonathan



« Last Edit: 08 Nov 2011 at 01:19 by Dave »

Offline Doug

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Re: Rear brake assembly
« Reply #1 on: 04 Nov 2011 at 22:28 »
Johnathan,

Not a Douglas baking plate. From 1926 to 1938, Douglas predominately used a eight inch diameter expanding single band brake. Sometimes servo assist, sometimes not. The brake bands are near all identical except for the direction of operation being CW or CCW depending on the situation. There is some small variation in the cast aluminum backing plate and the length and stoutness of the operating arm, as the years went on.

A quick search of 'band brakes' turns up the following posts:

Article on the servo band brake.
https://www.douglasmotorcycles.net/index.php?topic=338.msg969#msg969

Relining 350EW brakes.
https://www.douglasmotorcycles.net/index.php?topic=2287.msg8267#msg8267

General comments.
https://www.douglasmotorcycles.net/index.php?topic=889.msg2907#msg2907
https://www.douglasmotorcycles.net/index.php?topic=1927.msg7072#msg7072

Brake arm and shaft.
https://www.douglasmotorcycles.net/index.php?topic=2440.msg8823#msg8823
https://www.douglasmotorcycles.net/index.php?topic=3431.msg12530#msg12530


-Doug



[update links to https. 22Aug19  -Doug]
« Last Edit: 22 Aug 2019 at 17:13 by Doug »

Offline JonathanJoy

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Re: Rear brake assembly
« Reply #2 on: 05 Nov 2011 at 07:58 »
Thanks Doug,
I'll post a message on the parts wanted forum
Kind Regards Jonathan

Offline podge

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Re: Rear brake assembly
« Reply #3 on: 17 Nov 2011 at 10:45 »
Hi Johnathan

Did you get my spares list?

Regards

Paul