Replacing brake master cylinder on a 72 240z

[dogma420]

Help, if possible!

I have never replaced a master cylinder before....done all the other items on the brakes many times before....

Can anybody explain the procedure? I just bought a new m.c. from MSA.

Thanks,

Dog

[PROSTARR Z]

I guess I will tell you the most common method. First you must use a procedure refered to as "bench bleeding" This is used to purge all the air out of the master. The new master should have come with a kit to plug off the ports. If so, then use the plugs in the ports, fill the master about half full with clean Dot 3 or 4 brake fluid. using a phillips head screwdriver or a rod of some sort, pump the back of the master using slow strokes, make sure it remains level through the whole procedure. You should see air bubbles rising up, continue to pump until there is no more air. At this time it will be ready to install on the car. I am sure you know how to do this part so I wont get into it except to say be carefull with the threads on the lines, it is very easy to cross thread them!!! Once installed, you will need to bleed the whole system, you will need a buddy for this, have them pump up the pedal, then open the bleeder and repeat making sure that the pedal is NOT released until the bleeder is closed. Repeat until there is no air and then move on to the next wheel. Start with the RR, Then LR, Followed by the RF and last the LF. That should be it!!! Make sure to have plenty of Dot 3 or 4 on hand and remember not to put anything but dot 3 or 4 in the brake system!!! I hope this helps!!! KT

[justaZcarguy]

uh, ditto.

And Merry Xmas.

[dogma420]

Thanks a lot.

--Dog

[ZmeFly]

Prostarr nice

[PROSTARR Z]

Anything to help a fellow Z lover!!!! KT