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Brake Servo ?

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C

cyaker

Senior Member
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Still in tear down and strip phase on my 73 TR6. Pulled the pedal box and brake servo and master cylinder along with clutch cylinder. I was thinking I would send the servo out for rebuild. But now I can see the seals and rear fork and wonder if it had been redone in the past. Seals look fresh, no signs of cracking; the fork still has golden anodized appearance. There were no operational issues with the brakes when parked about 15 years ago. It feels like I am getting some vacuum when pressing on the fork. Does anyone have methods I could use to check it? I will do a rebuild on the master cylinder and plan on replacing the clutch cylinder. The frame is complete and has all new brake piping and rebuilds at each wheel.
 
I hate to say this without knocking on wood but the TR6 brake servo seems to have a very, very long trouble free life. Also, if the servo acts up, it is not a major undertaking to replace. If you sue the DOT5 fluid, you don't have to be overly concerned about brake fluid running the new paint. The masters and slaves are a different story.
 
Vettedog: "TR6 brake servo seems to have a very, very long
trouble free life."

You mean there might be a component of the Crypt Car that DPO
Pedro has not buggered up and will cost me big bucks $$ to
replace?

Can this be true? I have had to replace everything brake
related EXCEPT the servo unit. Including the emergency
brake system 100%

regards,

d /bcforum/images/%%GRAEMLIN_URL%%/wall.gif
 
Tinster said:
Can this be true?
Click to expand...
I doubt it. If the MC has leaked DOT 3/4 into the booster, the booster doesn't last long.
 
Here is an article. Included is a method to test the servo. After all the work to rebuild a unit the author recommends sending it out.

Buckeye servo rebuild
 
My 250 had the original servo on it when I bought it, and after two years of regular driving, the diaphragm ripped. Rather than mucking around with it, I replaced it. Took about ten minutes, but I neglected to bench bleed the servo, so it took *days* to get air out of the system. However, I guess it lends credence to the idea that the brake servo lasts a long time. Mine had been on the car for 38 years.
 
Thanks for the input
I think the way it looks and feels, I will clean it up and move forward on to the master cylinder. I did have a fluid leak at the back of the cylinder, which peeled away the paint and created the only rust under in the engine bay. I have to confess I created additional work in that area when I lifted the body off there was one brake line I missed and pulled down that shelf like area below the cylinders. First I will strip the engine bay back to bare metal.
 
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