| another brake question [message #371541] |
Sun, 26 November 2023 13:03  |
skip2
Messages: 544
Registered: September 2011
Location: Winter Haven,FL (center o...
Karma: 3
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Senior Member |
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After talking to Mr. Stone about his setup I started looking at my brass combination valve. When I got the coach 12 years ago the PO had made a fixture to hold down what I thought was the reset valve, on the front, all the time, anyone know what effect this will have. Also noticed that the valve hex body on the rear has what looks like a relief valve which is held in place with a star washer pressed in. I've read elsewhere that someone actually lost their rear brakes when this valve popped out, anyone know the function of this thing is. Any input or directions would be appreciated.
74 Canyon Lands, FiTech,
3.7 FD LSD, Manny Tranny,
Springfield Distributor,
2001 Chevy Tracker Ragtop Towd
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| Re: another brake question [message #371542 is a reply to message #371541] |
Mon, 27 November 2023 07:00  |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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The 'button' is held down during bleeding the brakes to keep the shuttle valve centered. Remove the fixture for normal use.
The OEM valve does not proportion in the Motorhome, it merely slows activation of the front discs until the rear shoes are extended to the drums. The car valves reduce pressure to the rear, this must be disabled to use a car valve in a Motorhome.
Search GMCMI archives for Dave Lenzi's article(s) on Motorhome brakes, he's the guru.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
[Updated on: Mon, 27 November 2023 07:02] Report message to a moderator |
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| Re: another brake question [message #371546 is a reply to message #371541] |
Wed, 29 November 2023 11:05 |
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wally
Messages: 643
Registered: August 2004
Location: Omaha Nebraska
Karma: 5
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skip2 wrote on Sun, 26 November 2023 13:03After talking to Mr. Stone about his setup I started looking at my brass combination valve. When I got the coach 12 years ago the PO had made a fixture to hold down what I thought was the reset valve, on the front, all the time, anyone know what effect this will have. Also noticed that the valve hex body on the rear has what looks like a relief valve which is held in place with a star washer pressed in. I've read elsewhere that someone actually lost their rear brakes when this valve popped out, anyone know the function of this thing is. Any input or directions would be appreciated.
Lenzi's article on combination valves starts on page 24 here
https://issuu.com/kimweeks04/docs/gmc_vintage_rving-2021_winter
https://issuu.com/kimweeks04/docs/gmc_vintage_rving-2021_winter
Wally Anderson
Omaha NE
75 Glenbrook
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