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8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc

410, 411, 412 servos

 
 
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Old 23-04-21, 07:09 PM
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Join Date: Apr 2021
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The 410 has a balance bar to mechanically adjust the proportion of effort applied to each master cylinder. I assume this will be the case with your system.

If you have a 4.25:1 servo for the rear brakes it will need less pressure, so more can be applied to the front. As the manufacturer fitted with 2 x 4.5:1 and that gave a very good feel, I will replace with as near to original as I can.

Once you have one servo removed it shouldn't be too much of a chore to do the second at the same time.
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