|
|
|
|
| Author |
|
|
Registered
Join Date: Jul 2001
Location: Portland, Oregon USA
Posts: 1
|
frozen/locked brake calipers after rebuild
Dear Tech Board:
Thank you in advance if anyone can be of assistance with this question. I recently rebuilt the brakes on my 1972 911T. (Had rotors turned, new pads, new pistons in front calipers and seals in all four calipers.) All went as planned and without a problem (or so I thought). After the brakes were bled, the rear calipers were both locked on. By cracking the bleeders, pressure was released and the calipers released. I mistakenly assumed that it must be the master cylinder (which had not been touched as part of the other brake work). I rebuilt the master cylinder, and did not experience any problems (that I knew of). Upon reassembly of the master cylinder, it had no effect on the situaiton with the rear brakes. They appear to bleed normally, but simply stay locked on until bleeder is cracked a bit. (Fronts appear to work perfectly). Any thoughts on why the rear calipers are locking up would be appreciated. Thanks in advance for any insights offered. |
||
07-10-2001, 07:38 PM
|
|
|
Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
|
Don,
Most likely the deflection compenstor mechanism in the center of the underside of the rear pistons ... that fits over that pin/stud sticking in the center of each piston bore. Rust makes them stick, and I bet you didn't disassemble or clean them when you did the seals! An internal snap-ring holds a 'stack' of parts in place. Disassemble and clean, and your problems will probably be gone! ------------------ Warren Hall 1973 911S Targa |
||
|
07-10-2001, 07:59 PM
|
|
