View Full Version : master cylinder push rod

03-04-2007, 01:50 PM
What does adjusting the master cylinder push rod on a '52 do ?? What is the effect on the master cyl., the brake pedal ??. I have an all new brake system. I have bled it every which direction but up. In the beginning I did hear air escape. I can have someone pump the pedal up and hold and bleed several times at the farthest point and from the other corners but we never get a pedal that will hold. Then, we can pump the pedal up and let off for 5 seconds and the pedal will then go all the way to the floor. If we keep pressure on the pedal it will not go to the floor. Can you solve this mystery ?? What is the fix ??......Brad

Dick Steinkamp
03-04-2007, 02:45 PM
It sounds to me like the fix is to adjust the brakes.

You are able to take the "slack" out of the brakes by pumping the pedal, but when you release it, they retract (quite a ways it sounds like) and you have to start over with the pumping.

Do adjust the master cylinder push rod to insure the master cylinder piston is retracting completely and that there is not too much "slop" before the push rod comes up against the piston. Your manual will tell you the clearance, but just enough to "feel" usual works.


03-04-2007, 03:21 PM
to clarify what Dick said... I think he's telling you to start by adjusting each individual wheel's brakes per the shop manual. then adjust the master cylinder pushrod, if necessary.

that's where I'd start, anyway.

good luck


55 Commander Starlight

03-04-2007, 03:51 PM
Thanks, I'll try that. Dick your Hawk does look edible-beautiful.........Brad

Dick Steinkamp
03-04-2007, 04:16 PM
quote:Originally posted by bradnree

Thanks, I'll try that. Dick your Hawk does look edible-beautiful.........Brad

Thanks Brad. We started color sanding it. It seems entirely counter intuitive to sand on that shiny paint and make it dull :(. Good luck with your brakes!


03-04-2007, 05:29 PM
If your 52 is equiped with a hill holder you must bleed that also.