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[GMCnet] Brake Bleeding with Air Brake Compressor attached to brake proportioning valve (?) [message #366633] Thu, 09 September 2021 09:41 Go to next message
Mark Kasiewicz is currently offline  Mark Kasiewicz   United States
Messages: 14
Registered: June 2014
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Junior Member
Hi y'all
My ignorance is speaking volumes here , but my 77 Kingsley seems to have a
Ride Rite compressor hooked up to the brake proportioning valve. I assume
this is for some kind of air brake system for towing, though the only Ride
Rite info I can find is for Firestone Air bags. I have the original air bag
compressor in the closet area)
My brakes are soft and I am wondering if replacing the brake fluid and
bleeding the brakes is something I can do on my own, (especially with the
extra compressor hookup) or should I go to a professional ?
Any recommendations for a place near Eau Claire, WI that could do the job
reliably for me ?

Thanks !
Mark Kasiewicz
'77 Kingsley
Gus da Bus
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Re: [GMCnet] Brake Bleeding with Air Brake Compressor attached to brake proportioning valve (?) [message #366751 is a reply to message #366633] Sun, 12 September 2021 21:52 Go to previous messageGo to next message
mantaman is currently offline  mantaman   United States
Messages: 10
Registered: October 2016
Location: Eau Claire, WI
Karma: 0
Junior Member
Rick's Auto Care center behind the Napa Store on the west side of EC( Next to Bowlwinkles) used to do the work on Gus when Roy owned it.

1975 eleganza, 3 stainless steel fuel tanks holds 90 gal., Thorley headers and 3" SS exhaust pipe, 6 Wheel disc brakes, Quad airbag system
Re: [GMCnet] Brake Bleeding with Air Brake Compressor attached to brake proportioning valve (?) [message #366755 is a reply to message #366633] Mon, 13 September 2021 09:00 Go to previous messageGo to next message
Matt Colie is currently offline  Matt Colie   United States
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
Senior Member
Mark Kasiewicz wrote on Thu, 09 September 2021 10:41
Hi y'all
My ignorance is speaking volumes here , but my 77 Kingsley seems to have a Ride Rite compressor hooked up to the brake proportioning valve. I assume this is for some kind of air brake system for towing, though the only Ride Rite info I can find is for Firestone Air bags. I have the original air bag compressor in the closet area)
My brakes are soft and I am wondering if replacing the brake fluid and bleeding the brakes is something I can do on my own, (especially with the extra compressor hookup) or should I go to a professional ?
Any recommendations for a place near Eau Claire, WI that could do the job reliably for me ?

Thanks !
Mark Kasiewicz
'77 Kingsley
Gus da Bus
Mark,

The compressor somehow attached to the combination valve really can't have anything to do with the coach brakes. It would be interesting to know what it is for, but that is about as far as this can go.

If the brakes are soft, bleeding might help, but are they really soft or is the peddle low? If the peddle is low, they might just need adjusting. If nobody has messed up the rear brakes, try backing up and stopping hard a few times. The automatic adjusters should work.

Matt Colie


Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
Re: [GMCnet] Brake Bleeding with Air Brake Compressor attached to brake proportioning valve (?) [message #366757 is a reply to message #366633] Mon, 13 September 2021 10:36 Go to previous message
Tilerpep is currently offline  Tilerpep   United States
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
Senior Member
I am curious if the air and brake systems are connected, and if so how and why. A few pics might help us help you sort it.

My brake and air lines all go along that frame under the driver seat and I am conjecturing they just look hooked together.


1975 Glenbrook, 1978 Royale rear bath Raleigh, NC
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