Rick Staples responded to Greg's question about the "brake" light remaining
on.
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of
> RickStapls
> Sent: Sunday, April 18, 1999 4:36 PM
> To: gmcmotorhome
> Subject: Re: GMC: Rear brake and shock questions
> Greg,
>........If the light remains on (it's "supposed" to recenter itself,
> but don't bet the farm on it), disconnect the wire at the combination
> valve (on frame
> behind L-front wheel). If the light then goes out, the valve is stuck.
> Remove the switch from the side of the combination valve, and
> look into the
> hole. You can see the shuttle valve. (Don't worry about fluid
> leaking out,
> there should be none present at the switch. If there is, the
> valve is bad.)
> There should be a groove in the shuttle, which should be centered in the
> switch hole. If not, very carefully (avoid scratching the
> shuttle) try to
> work it back to that position with an ice pick or some such. If
> you can't do
> it, you can try the old trick of opening a brake bleeder in the
> circuit that.....
I would like to add to Rick Staples' excellent advice on the workings of the
"combination" valve regarding resetting the switch. When the valve is in
the "triggered" position, a part of it protrudes from the front of the
assembly. You can force it back to it's centered position by applying force
directly to this protrusion.
Scott Shean
78 Royale
Baton Rouge, LA
on.
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto
wner-gmcmotorhome]On Behalf Of> RickStapls
> Sent: Sunday, April 18, 1999 4:36 PM
> To: gmcmotorhome
> Subject: Re: GMC: Rear brake and shock questions
> Greg,
>........If the light remains on (it's "supposed" to recenter itself,
> but don't bet the farm on it), disconnect the wire at the combination
> valve (on frame
> behind L-front wheel). If the light then goes out, the valve is stuck.
> Remove the switch from the side of the combination valve, and
> look into the
> hole. You can see the shuttle valve. (Don't worry about fluid
> leaking out,
> there should be none present at the switch. If there is, the
> valve is bad.)
> There should be a groove in the shuttle, which should be centered in the
> switch hole. If not, very carefully (avoid scratching the
> shuttle) try to
> work it back to that position with an ice pick or some such. If
> you can't do
> it, you can try the old trick of opening a brake bleeder in the
> circuit that.....
I would like to add to Rick Staples' excellent advice on the workings of the
"combination" valve regarding resetting the switch. When the valve is in
the "triggered" position, a part of it protrudes from the front of the
assembly. You can force it back to it's centered position by applying force
directly to this protrusion.
Scott Shean
78 Royale
Baton Rouge, LA
