after brake accumulator change.........HELP
- Thread starter Anthony K
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Turbo Brian
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- May 24, 2001
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the PM pump shouldnt run more than about 10-15 SECONDS and at most about 20-30 SECONDS if you've pumped the brakes alot while the car was off. if you're pump is running more than that, something isnt right. you're going to burn up the pump motor if its running as long as you say.
Turbo Brian
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- May 24, 2001
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- 574
If the pump is continuously running, you probably have a bad pressure switch. There are only three main components, the motor, the accumulator, and the pressure switch. The motor obviously works, it is running. The accumulator was changed for a known good one. The only thing left, is the pressure switch. When these fail, there is nothing to turn the pump off.
rodman99999
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- Mar 25, 2004
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The motor runs a vane type pump that builts the pressure the accumulator sees. If your vanes are worn: no pressure/slow build. Also a possibility. 
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Turbo Brian said:
Additionally, there may be some dirt lodged between the main body and check valve. Remove the feed hose from the main body and use a cleaner to clear it out. You may need a puller to remove the check valve washer. Pay particular attention to the assembly. As posted in your other brake thread, you need to make sure the feed port (floor of the PM reservoir) is covered in brake fluid when the motor is running. The PM system may need to be bled. Shut he ignition off and loosen the hose (at the master cylinder body), until fluid flows. It is the only hose with a metal tube going over the master cylinder. DO NOT COMPLETELY REMOVE THE HOSE!!!!! THERE IS OVER 700PSI OF HYDRAULIC PRESSURE ON THAT HOSE!!!! Fluid will go everywhere and so will the hose.
