| Poor Braking [message #98017] |
Tue, 31 August 2010 23:18  |
LEdmcconnell
Messages: 12
Registered: November 2004
Location: Bridgeton, MO
Karma: 0
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Junior Member |
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I have to really stand on the brakes to get the coach to stop. I thought the problem was the brake booster, but I checked it by starting the motor & pulling the check valve. It had vacuum. I replaced it & shut off the motor before removing the valve again. I heard air rushing into the booster. Does this mean the booster is OK? If not, what other test can I give? If the booster is alright, where else should I look?
Luther McConnell
'76 Birchaven
Bridgeton, MO
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| Re: Poor Braking [message #98047 is a reply to message #98017] |
Wed, 01 September 2010 10:04  |
Bob de Kruyff
Messages: 4260
Registered: January 2004
Location: Chandler, AZ
Karma: 1
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Senior Member |
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| LEdmcconnell wrote on Tue, 31 August 2010 22:18 |
I have to really stand on the brakes to get the coach to stop. I thought the problem was the brake booster, but I checked it by starting the motor & pulling the check valve. It had vacuum. I replaced it & shut off the motor before removing the valve again. I heard air rushing into the booster. Does this mean the booster is OK? If not, what other test can I give? If the booster is alright, where else should I look?
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Sounds like the booster is probably OK. I would check to make sure both front and back systems are working. Check the master cylinder fluid. Next I would adjust the rear brakes.
Bob de Kruyff
78 Eleganza
Chandler, AZ
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| Re: Poor Braking [message #98054 is a reply to message #98047] |
Wed, 01 September 2010 10:46 |
gbarrow2
Messages: 765
Registered: February 2004
Location: Lake Almanor, Ca./ Red Bl...
Karma: 3
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Senior Member |
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What Bob said. Especially about adjusting the rear.
The front working alone will not stop the coach. Properly adjusted, the rears will make a big difference.
Gene Barrow
Lake Almanor, Ca.
1976 Palm Beach
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| Re: [GMCnet] Poor Braking [message #98141 is a reply to message #98056] |
Wed, 01 September 2010 22:06 |
gmc gmc
Messages: 69
Registered: May 2009
Karma: 0
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humm ok maybe my rear brakes need adjusting. How do I do that?
I have not had time, and little scared to take back wheels off. Are
bearing hard to repack?
thanks
Mike Derr
Madison, WI
78 refurbished.
On Wed, Sep 1, 2010 at 12:19 PM, Dan Gregg <gregg_dan@hotmail.com> wrote:
>
>
> Luther, what Bob said. remember he fixed my braking problem back in the
> winter. It was no fun driving from Dallas to Az, through El Paso with no
> brakes. Bob replaced my MC and adjusted my rear brakes. I also put on the
> sensatized booster from Jim K. My brakes are very good again. The sens.
> booster does not make the brakes better but it makes them so you just touch
> the pedal, like a car, and the thing stops. Used to really have to apply
> force to the pedal.
> Dan
> still got an lp leak and hope yall can sniff it out in Du Quoin
> --
> Dan & Teri Gregg
>
> http://danandteri.blogspot.com/
>
>
>
>
> _______________________________________________
> GMCnet mailing list
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| Re: [GMCnet] Poor Braking [message #98162 is a reply to message #98141] |
Thu, 02 September 2010 04:26 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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| gmc gmc wrote on Wed, 01 September 2010 22:06 |
humm ok maybe my rear brakes need adjusting. How do I do that?
I have not had time, and little scared to take back wheels off. Are
bearing hard to repack?
thanks
Mike Derr
Madison, WI
78 refurbished.
On Wed, Sep 1, 2010 at 12:19 PM, Dan Gregg <gregg_dan@hotmail.com> wrote:
>
>
> Luther, what Bob said. remember he fixed my braking problem back in the
> winter. It was no fun driving from Dallas to Az, through El Paso with no
> brakes. Bob replaced my MC and adjusted my rear brakes. I also put on the
> sensatized booster from Jim K. My brakes are very good again. The sens.
> booster does not make the brakes better but it makes them so you just touch
> the pedal, like a car, and the thing stops. Used to really have to apply
> force to the pedal.
> Dan
> still got an lp leak and hope yall can sniff it out in Du Quoin
> --
> Dan & Teri Gregg
>
> http://danandteri.blogspot.com/
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Back brakes adjust just like any other drum brakes. You raise the wheel just enough to be able to spin it. Reach in the adjusting hole in the rear backing plate with a brake adjusting tool. Crank in the adjuster until you just hear or feel a very slight drag. Do all 4 and you are done. They are suppose to self adjust when you back up. How many times to you backup ? Probably not many.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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