Master Cylinder and Servo

[Rich]

I've recently taken my master cylinder off by separating it from the servo there is a small amount of brake fluid inside the servo. Is this normal? Before I drained the system it seemed to hold fluid and the brakes (that hadn't seized) operated as you would expect when the pedal was depressed.

Rich

[manifold]

They do weep a tad now and again. Depends how long its been off road I suppose. If the bore gets corroded due to standing this will obviously impact on the seals.

I wouldnt be chancing anything with brakes. The most important parts on the car in my mind, followed closely by a well anchored suspension system.

[Rich]

They do weep a tad now and again. Depends how long its been off road I suppose. If the bore gets corroded due to standing this will obviously impact on the seals.

I wouldnt be chancing anything with brakes. The most important parts on the car in my mind, followed closely by a well anchored suspension system.

Indeed, I've been looking around for a seal kit and they seem to be thin on the ground, the cylinder isn't the easiest to strip either.

Rich

[Hans Efde]

Every now and then there are seal kits on Ebay. I bought one for my master cylinder, but found out it was for another brand. There seem to be 2 types of master cylinders around that look almost identical (AP/Lockheed and BF Goodrich?). In the end I just cleaned and polished mine and reassembled it again. Although there are complete new master cylinders for sale on Ebay as well. Just take care you check which one you have, with or without the pressure regulator for the rear brakes.

But I still had poor brakes, cause was the servo also contaminated with some sort of moisture. Not sure it was brake fluid, could be something coming from the inlet manifold. There was another mention on this forum about poor braking caused by the servo. Apparently there can be play between the incoming and outgoing rod from the servo, so you end up with a large dead stroke.

In the end I removed the servo and connected the master cylinder directly to the brake pedal via an adjustable rod. Much better now. A servo connected to a turbo pressurized intake manifold doesn't work anyway!