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Matco Parking Brake

 
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davidsoutpost(at)comcast.
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PostPosted: Wed Nov 11, 2009 6:06 am    Post subject: Matco Parking Brake Reply with quote

For those that are using the Matco Parking Brake valve. If you are using the old style rectangular valve, they have been known to develop an internal leak that can allow fluid to go from one side to the other on occassion.  It is very slight, but was a source of trouble that took some time to track down on the Cozy MKIV I built with a friend. Every so often it would leak under pressure and it eventually drained a master in short order. Luckily my friend discovered he had no brakes during his run-up at a busy airport and was able to get help from one of the FBO's. After some research, we found that Matco's (Parker Valve) old design had issues they were aware of and redisigned the valve. It is now a modular style valve and is available from AS&S among other sources.  Maybe this will prevent someone from banging there head against the wall like we did. http://www.matcomfg.com/PARKINGBRAKEVALVEDUAL-idv-3579-8.html and http://www.aircraftspruce.com/catalog/lgpages/matcoPVPVs.php

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