| [GMCnet] New Question: Brake Problem [message #82175] |
Tue, 27 April 2010 20:01  |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
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Senior Member |
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Well, I got Money Pit home a couple of weeks ago with
known poor brakes. After I arranged a storage location
about 1.5 miles from the house, I started her up and
after about a hundred yards or less, the red brake
warning light came on and pedal went almost to the floor
when I applied the brakes. Still had SOME braking, but
a bit scary. hen the red light went out and brakes worked
about as well as they ever had (pretty poor) until I got
almost to the storage lot and the warning conditions again
appeared. Got the coach safely parked and went home again
after I started to breathe normally again.
I've been back and checked the master cylinder and it is
virtually full. I stronly suspect that there must be
air in the lines, but the brakes were supposedly bled
before I started my trip home to Oklahoma City from Texas.
I have no facilities or location to work on the coach
(gravel in storage lot) and haven't checked to see if
local Chevy/GMC car and truck dealer can or will work
on the brakes.
I'm many decades past the time when I did virtually all
my own vehicle repairs and will gratefully appreciate any
and all suggestions.
Cheers and thanks in advance.
* Mac Macdonald *
* Oklahoma City *
** "Money Pit" **
* '76 ex - P.B. *
p.s. I think Van Vanlandingham is supposed to be getting
his coach tomorrow. I haven't heard from him in a few days.
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| Re: [GMCnet] New Question: Brake Problem [message #82181 is a reply to message #82175] |
Tue, 27 April 2010 21:12  |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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The symptoms you describe could well be that you are leaking between
the front and rear chambers of the master cylinder.
I would guess that replacement of your master cylinder will solve your
problem.
Emery Stora
77 Kingsley
Santa Fe, NM
On Apr 27, 2010, at 7:01 PM, D C *Mac* Macdonald wrote:
>
> Well, I got Money Pit home a couple of weeks ago with
> known poor brakes. After I arranged a storage location
> about 1.5 miles from the house, I started her up and
> after about a hundred yards or less, the red brake
> warning light came on and pedal went almost to the floor
> when I applied the brakes. Still had SOME braking, but
> a bit scary. hen the red light went out and brakes worked
> about as well as they ever had (pretty poor) until I got
> almost to the storage lot and the warning conditions again
> appeared. Got the coach safely parked and went home again
> after I started to breathe normally again.
>
> I've been back and checked the master cylinder and it is
> virtually full. I stronly suspect that there must be
> air in the lines, but the brakes were supposedly bled
> before I started my trip home to Oklahoma City from Texas.
>
> I have no facilities or location to work on the coach
> (gravel in storage lot) and haven't checked to see if
> local Chevy/GMC car and truck dealer can or will work
> on the brakes.
>
> I'm many decades past the time when I did virtually all
> my own vehicle repairs and will gratefully appreciate any
> and all suggestions.
>
> Cheers and thanks in advance.
>
> * Mac Macdonald *
> * Oklahoma City *
> ** "Money Pit" **
> * '76 ex - P.B. *
>
> p.s. I think Van Vanlandingham is supposed to be getting
> his coach tomorrow. I haven't heard from him in a few days.
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Emery Stora
77 Kingsley
Santa Fe, NM
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| Re: [GMCnet] New Question: Brake Problem [message #82186 is a reply to message #82180] |
Tue, 27 April 2010 21:35 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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Raybestos MC39075, They can convert it.
On Tue, Apr 27, 2010 at 6:53 PM, D C *Mac* Macdonald <k2gkk@hotmail.com> wrote:
>
> How about an AutoZone part number for the master cylinder?
>
> I believe I could do THAT change.
>
>
> * Mac Macdonald *
> * Oklahoma City *
> ** "Money Pit" **
> * '76 ex - P.B. *
>
> p.s. Â Haven't installed the APC yet, Gene.
>
>
>
> ----------------------------------------
> Date: Tue, 27 Apr 2010 18:38:25 -0700
> From: mr.erfisher@gmail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] New Question: Brake Problem
>
> almost always a bad master cyl.
>
> almost any brake shop can change a master cyl.
>
> good luck
>
> gene
>
>
>
> ----  Excerpt of original message  ----
>
> I started her up and after about a hundred yards or less,
> the red brake warning light came on and pedal went almost
> to the floor when I applied the brakes.
>
> ----  End of origianl message excerpt  ----
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] New Question: Brake Problem [message #82275 is a reply to message #82180] |
Wed, 28 April 2010 12:39 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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Senior Member |
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| k2gkk wrote on Tue, 27 April 2010 20:53 |
How about an AutoZone part number for the master cylinder?
I believe I could do THAT change.
* Mac Macdonald *
|
Remember to bleed the MC before connection to the brake lines.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] New Question: Brake Problem [message #82282 is a reply to message #82180] |
Wed, 28 April 2010 13:05 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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Here was a recent post that might help
Hi Ron--a few thoughts. The unit we installed in Dan's coach was a Fenco
M1730 from Autozone. Although his brakes seem to work great, they also
worked great (before failure) with whatever was on there before. Dan may
want to pipe in whether they are as good now as originally. One issue with
recommending this for you is that you have 80mm front calipers which could
result in a volume problem for this M/C. But as you say for $16 (including
tax) it may be worth a try. Another thing to watch is the bleeding of the
unit. Dan, Jeff and I were surprised how much you have to bleed the M/C
itself. We had to do it on the coach which was fine, but it took a lot of
recirculating pushes of the pedal before we hooked up the lines. I have a
suspicion that some folks may have issues just because of inadequate
bleeding of the M/C itself.
--
Bob de Kruyff
On Tue, Apr 27, 2010 at 6:53 PM, D C *Mac* Macdonald <k2gkk@hotmail.com>wrote:
>
> How about an AutoZone part number for the master cylinder?
>
> I believe I could do THAT change.
>
>
> * Mac Macdonald *
> * Oklahoma City *
> ** "Money Pit" **
> * '76 ex - P.B. *
>
> p.s. Haven't installed the APC yet, Gene.
>
>
>
> ----------------------------------------
> Date: Tue, 27 Apr 2010 18:38:25 -0700
> From: mr.erfisher@gmail.com
> To: gmclist@temp.gmcnet.org
> Subject: Re: [GMCnet] New Question: Brake Problem
>
> almost always a bad master cyl.
>
> almost any brake shop can change a master cyl.
>
> good luck
>
> gene
>
>
>
> ---- Excerpt of original message ----
>
> I started her up and after about a hundred yards or less,
> the red brake warning light came on and pedal went almost
> to the floor when I applied the brakes.
>
> ---- End of origianl message excerpt ----
>
>
> --
> Gene Fisher -- 74-23,77PB/ore/ca
> “Give a man a fish; you have fed him for today --- give him a URL and
> -------
> http://gmcmotorhome.info/
> Alternator Protection Cable
> http://gmcmotorhome.info/APC.html
>
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
--
Gene Fisher -- 74-23,77PB/ore/ca
“Give a man a fish; you have fed him for today --- give him a URL and
-------
http://gmcmotorhome.info/
Alternator Protection Cable
http://gmcmotorhome.info/APC.html
_______________________________________________
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| Re: [GMCnet] New Question: Brake Problem [message #82285 is a reply to message #82279] |
Wed, 28 April 2010 13:19 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
|
Senior Member |
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On Apr 28, 2010, at 11:58 AM, D C *Mac* Macdonald wrote:
>
> Oh, yeah, Steve!
>
> If I do that well, I expect that any air bubbles
> in the line will be minimal after hooking back up
> and I can get to a place where I can bleed the
> lines. I need new shoes at the rear, also.
>
> Mac Macdonald
>
You should bench bleed it first. Grip it in a vice and fill it with
fluid. I usually comes with two plastic fittings and little plastic
tubes. Push in on the piston with a screwdriver or other rod and have
the two tubes fastened down so that they eject back into the top of
the master cylinders. Push the piston in and it will return out by
the spring inside. Do this until you get no more bubbles. Then use a
small ball peen hammer and tap the side of the cylinder while pushing
some more. You usually get a few more bubbles out that way.
Then install it.
Emery Stora
77 Kingsley
Santa Fe, NM
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