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Hard brake pedal with limited actual braking! 1800 1970

posted by  Whale on  Thu Jan 6 21:31 CST 2022
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last visit: Fri Jun 14 19:52 CST 2013
[RELATED]

Yes, the problem occurred as soon as I completed bleeding the brakes and ended up with the half way down hard pedal. No, their isn't a vacuum leak or hissing with the engine running. After reading the manual it hints that it might be the Brake System Warning Valve is out of position and needs to be reset and system bled again. I'll give it try tomorrow.


Checking my shop manual gave me a clue as per this description: Brake System Warning Valve - The valve is centered by hydraulic pressure from the primary circuit on one side and the secondary circuit on the other. When a hydraulic imbalance exists, such as a leak in one of the calipers, the valve will move off-center. Sometimes, the valve will activate the brake warning light when the system is bled. When this happens, the valve has to be reset.
Valve Resetting - Disconnect the plug contact and screw out the warning switch so that the pistons inside the valve may return to their normal position. After doing this the system must be bled. Screw the warning switchback in and torque to 14ft lbs. Reconnect the plug contact.





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