410, 411, 412 servos

[Classic Bristol Car Parts Company]

Originally Posted by dwomby

and the saga drags on................................

I have now gone through a copy of the AM DB5 and DB6 parts manuals (I have the manuals, now all I need is one of their cars!).

As far as I can see, they had NO mechanism to reduce the force on the rear brakes. They use a dual master cylinder with one line to a servo for the front brakes and one to a servo for the rear. Same setup as my car now has. There is no 'balancing bar', 'compensating lever', 'brake pressure limiter' or 'proportioning valve' visible or mentioned in the parts lists.

So I thought they must have been relying purely on the lower servo boost to the rear brakes to reduce the chance of rear brake lockup in an emergency stop and I would do the same. Then I noticed they use the same part number for the front servo and the rear servo!!!!!

David

David

At Bristol cars the servos are the same but we used to modify the master cylinder and if you didn't do the modification the rear brakes would stick on