Parking break?

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Parking break?

Home > Discussion Forum > Mechanic's Corner - Brakes

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Parking break? by Art

Greetings all! I have a gmc pd 4907 that is dumping the air out of the system when the parking break is applied. We have just had a bunch of valves replaced, but can't keep the system charged with the application of the parking break. If I hold the service break, the system will charge and at about 100 PSI, the exhausting stops, and everything works as normal. anybody out there had a similar problem or know of a solution?

thanks a million!

Art

All Messages in Thread		Author	Date
	Parking break?	Art	5-24-06