Home » Public Forums » GMCnet » rear brake ?
| rear brake ? [message #175539] |
Wed, 04 July 2012 18:21  |
chasingsummer
Messages: 434
Registered: May 2011
Location: asheboro, nc
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i am looking for a pic of my rear brakes, my parts book looks close, but not the same
between taking apart, then going to find a wheel cylinder, then putting back together it just not look proper, and no i would prefer not to put together wrong so as to raise different wheel then take it apart, then back to this one,
spring across top i think is way too tight, and the mech that i think is meant to adjust pad pressure does not seem to look correct either,
thanks bgk
brian
asheboro, nc
75 eleganza, 74 build
119k miles and counting,
DOG HOUSE
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| Re: rear brake ? [message #175542 is a reply to message #175539] |
Wed, 04 July 2012 18:38  |
C Boyd
Messages: 2629
Registered: April 2006
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Sir: does this help??
http://www.gmcmhphotos.com/photos/crestmont/p36371-new-carbon-metallic-br.html
| chasingsummer wrote on Wed, 04 July 2012 19:21 |
i am looking for a pic of my rear brakes, my parts book looks close, but not the same
between taking apart, then going to find a wheel cylinder, then putting back together it just not look proper, and no i would prefer not to put together wrong so as to raise different wheel then take it apart, then back to this one,
spring across top i think is way too tight, and the mech that i think is meant to adjust pad pressure does not seem to look correct either,
thanks bgk
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C. Boyd
76 Crestmont
East Tennessee
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| Re: rear brake ? [message #175543 is a reply to message #175539] |
Wed, 04 July 2012 19:00 |
winter
Messages: 247
Registered: September 2007
Location: MPLS MN
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make sure the small pad is the self engaging one.
I found my pads were installed wrong on one side the first time i pulled mine apart.
"I edited this comment so that it gives the correct info."
[Updated on: Thu, 05 July 2012 09:41] Report message to a moderator |
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| Re: [GMCnet] rear brake ? [message #175547 is a reply to message #175543] |
Wed, 04 July 2012 19:25 |
emerystora
Messages: 4442
Registered: January 2004
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On Jul 4, 2012, at 6:00 PM, jerrod winter wrote:
>
>
> make sure the big pad is the self engaging one.
>
> I found my pads were installed wrong on one side the first time i pulled mine apart.
Well, actually, the one that self engages is called the primary shoe and is the smaller pad. This always faces forward.
We may talking about the same thing but here is something that I had posted back in 2001 that gives a good summary:
>> <<<<<I have an old reference book that was printed in 1969. "Stokel Auto Mechanics Fundamentals". I have used it often over the years and it is a super reference book that goes into a lot of detail. The section on brakes alone is over 40 pages long on 8-1/2 x 11" pages with lots of drawings.
>>
>> For the drum brakes, it describes the ones used on the GMC as "Servo - Self-energizing Brakes". It says:
>>
>> "Servo and self-energizing action is produced by the hooking the heel of the primary shoe to the toe of the secondary shoe. When the wheel cylinder forces the top ends of the shoes out against the drum, the forward shoe will tend to stick to the revolving brake drum and be carried around with it. As the primary shoe attempts to revolve, it will jam the secondary shoe against the single anchor pin. This stops both shoes and produces a binding effect that actually helps the brakes shoes apply themselves. This servo and self-energizing action reduces the amount of pedal pressure necessary."
>>
>> It goes on to show the forces that are produced by this action.
>>
>> It also says: "The primary shoe on self-energizing brakes generally has a smaller amount of lining. The primary lining is usually also of a different composition. The secondary shoe does more of the braking, and less is needed on the primary shoe."
>>
>> "The secondary shoe always faces the rear of the vehicle".
>>
>> "If the shoes are accidentally reversed, there will be adverse wear, more pedal pressure required and poor braking.">>>>>
>>
>> So, if any of you are doing your own brake work, remember "Big pad to Back".
Emery Stora
77 Kingsley
Frederick, CO
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| Re: [GMCnet] rear brake ? [message #175548 is a reply to message #175547] |
Wed, 04 July 2012 19:38 |
Mr ERFisher
Messages: 7117
Registered: August 2005
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here is a picture
http://www.gmcmhphotos.com/photos/disk-brakes/p3465.html
gene
On Wed, Jul 4, 2012 at 5:25 PM, Emery Stora <emerystora@mac.com> wrote:
>
> On Jul 4, 2012, at 6:00 PM, jerrod winter wrote:
>
> >
> >
> > make sure the big pad is the self engaging one.
> >
> > I found my pads were installed wrong on one side the first time i pulled
> mine apart.
>
> Well, actually, the one that self engages is called the primary shoe and
> is the smaller pad. This always faces forward.
> We may talking about the same thing but here is something that I had
> posted back in 2001 that gives a good summary:
>
>
> >> <<<<<I have an old reference book that was printed in 1969. "Stokel
> Auto Mechanics Fundamentals". I have used it often over the years and it
> is a super reference book that goes into a lot of detail. The section on
> brakes alone is over 40 pages long on 8-1/2 x 11" pages with lots of
> drawings.
> >>
> >> For the drum brakes, it describes the ones used on the GMC as "Servo -
> Self-energizing Brakes". It says:
> >>
> >> "Servo and self-energizing action is produced by the hooking the heel
> of the primary shoe to the toe of the secondary shoe. When the wheel
> cylinder forces the top ends of the shoes out against the drum, the forward
> shoe will tend to stick to the revolving brake drum and be carried around
> with it. As the primary shoe attempts to revolve, it will jam the
> secondary shoe against the single anchor pin. This stops both shoes and
> produces a binding effect that actually helps the brakes shoes apply
> themselves. This servo and self-energizing action reduces the amount of
> pedal pressure necessary."
> >>
> >> It goes on to show the forces that are produced by this action.
> >>
> >> It also says: "The primary shoe on self-energizing brakes generally has
> a smaller amount of lining. The primary lining is usually also of a
> different composition. The secondary shoe does more of the braking, and
> less is needed on the primary shoe."
> >>
> >> "The secondary shoe always faces the rear of the vehicle".
> >>
> >> "If the shoes are accidentally reversed, there will be adverse wear,
> more pedal pressure required and poor braking.">>>>>
> >>
> >> So, if any of you are doing your own brake work, remember "Big pad to
> Back".
>
>
> Emery Stora
> 77 Kingsley
> Frederick, CO
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List 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] rear brake ? [message #175552 is a reply to message #175548] |
Wed, 04 July 2012 20:09 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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You should put a caption on that picture saying that it is on the passenger side.
Emery Stora
On Jul 4, 2012, at 6:38 PM, gene Fisher <mr.erfisher@gmail.com> wrote:
> here is a picture
> http://www.gmcmhphotos.com/photos/disk-brakes/p3465.html
>
> gene
>
>
> On Wed, Jul 4, 2012 at 5:25 PM, Emery Stora <emerystora@mac.com> wrote:
>
>>
>> On Jul 4, 2012, at 6:00 PM, jerrod winter wrote:
>>
>>>
>>>
>>> make sure the big pad is the self engaging one.
>>>
>>> I found my pads were installed wrong on one side the first time i pulled
>> mine apart.
>>
>> Well, actually, the one that self engages is called the primary shoe and
>> is the smaller pad. This always faces forward.
>> We may talking about the same thing but here is something that I had
>> posted back in 2001 that gives a good summary:
>>
>>
>>>> <<<<<I have an old reference book that was printed in 1969. "Stokel
>> Auto Mechanics Fundamentals". I have used it often over the years and it
>> is a super reference book that goes into a lot of detail. The section on
>> brakes alone is over 40 pages long on 8-1/2 x 11" pages with lots of
>> drawings.
>>>>
>>>> For the drum brakes, it describes the ones used on the GMC as "Servo -
>> Self-energizing Brakes". It says:
>>>>
>>>> "Servo and self-energizing action is produced by the hooking the heel
>> of the primary shoe to the toe of the secondary shoe. When the wheel
>> cylinder forces the top ends of the shoes out against the drum, the forward
>> shoe will tend to stick to the revolving brake drum and be carried around
>> with it. As the primary shoe attempts to revolve, it will jam the
>> secondary shoe against the single anchor pin. This stops both shoes and
>> produces a binding effect that actually helps the brakes shoes apply
>> themselves. This servo and self-energizing action reduces the amount of
>> pedal pressure necessary."
>>>>
>>>> It goes on to show the forces that are produced by this action.
>>>>
>>>> It also says: "The primary shoe on self-energizing brakes generally has
>> a smaller amount of lining. The primary lining is usually also of a
>> different composition. The secondary shoe does more of the braking, and
>> less is needed on the primary shoe."
>>>>
>>>> "The secondary shoe always faces the rear of the vehicle".
>>>>
>>>> "If the shoes are accidentally reversed, there will be adverse wear,
>> more pedal pressure required and poor braking.">>>>>
>>>>
>>>> So, if any of you are doing your own brake work, remember "Big pad to
>> Back".
>>
>>
>> Emery Stora
>> 77 Kingsley
>> Frederick, CO
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List 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
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] rear brake ? [message #175553 is a reply to message #175552] |
Wed, 04 July 2012 20:11 |
Mr ERFisher
Messages: 7117
Registered: August 2005
Karma: 2
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Senior Member |
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done
gene
On Wed, Jul 4, 2012 at 6:09 PM, Emery Stora <emerystora@mac.com> wrote:
> You should put a caption on that picture saying that it is on the
> passenger side.
>
>
>
> Emery Stora
>
> On Jul 4, 2012, at 6:38 PM, gene Fisher <mr.erfisher@gmail.com> wrote:
>
> > here is a picture
> > http://www.gmcmhphotos.com/photos/disk-brakes/p3465.html
> >
> > gene
> >
> >
> > On Wed, Jul 4, 2012 at 5:25 PM, Emery Stora <emerystora@mac.com> wrote:
> >
> >>
> >> On Jul 4, 2012, at 6:00 PM, jerrod winter wrote:
> >>
> >>>
> >>>
> >>> make sure the big pad is the self engaging one.
> >>>
> >>> I found my pads were installed wrong on one side the first time i
> pulled
> >> mine apart.
> >>
> >> Well, actually, the one that self engages is called the primary shoe and
> >> is the smaller pad. This always faces forward.
> >> We may talking about the same thing but here is something that I had
> >> posted back in 2001 that gives a good summary:
> >>
> >>
> >>>> <<<<<I have an old reference book that was printed in 1969. "Stokel
> >> Auto Mechanics Fundamentals". I have used it often over the years and
> it
> >> is a super reference book that goes into a lot of detail. The section
> on
> >> brakes alone is over 40 pages long on 8-1/2 x 11" pages with lots of
> >> drawings.
> >>>>
> >>>> For the drum brakes, it describes the ones used on the GMC as "Servo -
> >> Self-energizing Brakes". It says:
> >>>>
> >>>> "Servo and self-energizing action is produced by the hooking the heel
> >> of the primary shoe to the toe of the secondary shoe. When the wheel
> >> cylinder forces the top ends of the shoes out against the drum, the
> forward
> >> shoe will tend to stick to the revolving brake drum and be carried
> around
> >> with it. As the primary shoe attempts to revolve, it will jam the
> >> secondary shoe against the single anchor pin. This stops both shoes and
> >> produces a binding effect that actually helps the brakes shoes apply
> >> themselves. This servo and self-energizing action reduces the amount of
> >> pedal pressure necessary."
> >>>>
> >>>> It goes on to show the forces that are produced by this action.
> >>>>
> >>>> It also says: "The primary shoe on self-energizing brakes generally
> has
> >> a smaller amount of lining. The primary lining is usually also of a
> >> different composition. The secondary shoe does more of the braking, and
> >> less is needed on the primary shoe."
> >>>>
> >>>> "The secondary shoe always faces the rear of the vehicle".
> >>>>
> >>>> "If the shoes are accidentally reversed, there will be adverse wear,
> >> more pedal pressure required and poor braking.">>>>>
> >>>>
> >>>> So, if any of you are doing your own brake work, remember "Big pad to
> >> Back".
> >>
> >>
> >> Emery Stora
> >> 77 Kingsley
> >> Frederick, CO
> >> _______________________________________________
> >> GMCnet mailing list
> >> Unsubscribe or Change List 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
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List 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] rear brake ? [message #175554 is a reply to message #175552] |
Wed, 04 July 2012 20:21 |
midlf
Messages: 2212
Registered: July 2007
Location: SE Wisc. (Palmyra)
Karma: 1
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| emerystora wrote on Wed, 04 July 2012 20:09 |
You should put a caption on that picture saying that it is on the passenger side.
Emery Stora
|
The trick in looking at GMCMH rear drum brake pics to determine the side shown is to look for the Park Brake cable. It is always to the front.
Steve Southworth
1974 Glacier TZE064V100150 (for workin on)
1975 Transmode TZE365V100394 (parts & spares)
Palmyra WI
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| Re: [GMCnet] rear brake ? [message #175555 is a reply to message #175552] |
Wed, 04 July 2012 20:32 |
chasingsummer
Messages: 434
Registered: May 2011
Location: asheboro, nc
Karma: 0
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thanks for the pics,
neither one of my pads where larger or smaller than the other??
plenty of pad, i think my main issue was either wheel clyinder or maybe e brake cable hanging,
i did not replace pads, but wheel cylinder, which required all brake stuff to come off.
i am starting to think my small spring of the two on top might be stretched,one to rear side . ,
my wheel in question was drivers rear, which put emergy brake piece and adjusting piece both on rear half .
how much smaller should the forward side pad be compared to the rear one?
thanks bgk
brian
asheboro, nc
75 eleganza, 74 build
119k miles and counting,
DOG HOUSE
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| Re: [GMCnet] rear brake ? [message #175556 is a reply to message #175555] |
Wed, 04 July 2012 20:38 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Make sure that you don't have the two longer ones on one wheel and two shorter ones on another wheel.
The shorter material is usually about 1 or 2 inches shorter.
It's not just the length of the material, the composition of the primary shoe is different from the secondary.
Emery Stora
77 Kingsley
Frederick, CO
Emery
On Jul 4, 2012, at 7:32 PM, brian <chasingsummer@triad.rr.com> wrote:
>
>
> thanks for the pics,
> neither one of my pads where larger or smaller than the other??
> plenty of pad, i think my main issue was either wheel clyinder or maybe e brake cable hanging,
> i did not replace pads, but wheel cylinder, which required all brake stuff to come off.
> i am starting to think my small spring of the two on top might be stretched,one to rear side . ,
> my wheel in question was drivers rear, which put emergy brake piece and adjusting piece both on rear half .
> how much smaller should the forward side pad be compared to the rear one?
> thanks bgk
> --
> brian
> asheboro, nc
> 75 eleganza 2 74 build
> 118k miles and counting,
> DOG HOUSE
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: [GMCnet] rear brake ? [message #175557 is a reply to message #175552] |
Wed, 04 July 2012 20:53 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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[quote title=emerystora wrote on Wed, 04 July 2012 18:09]You should put a caption on that picture saying that it is on the passenger side.
Emery
I believe you ment to say the left or drivers side.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] rear brake ? [message #175613 is a reply to message #175563] |
Thu, 05 July 2012 10:21 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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[quote title=emerystora wrote on Wed, 04 July 2012 19:24]No, Roy. I meant the passenger side.
Here is the picture that Gene posted:
http://www.gmcmhphotos.com/photos/disk-brakes/p3465.html
The shoe with the shorter material is on the right (front) and the parking brake cable looks to be on the right as well.
Both of these tell me that the picture is taken of the passenger side.
Emery Stora
On Jul 4, 2012, at 7:53 PM, roy@gmcnet.org wrote:
>
>
> | emerystora wrote on Wed, 04 July 2012 18:09 |
You should put a caption on that picture saying that it is on the passenger side.
>
>
>
> Emery
>
> I believe you meant to say the left or drivers side.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
> _______________________________________________
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Yep I figured it out I was thinking you were talking about the first photo that Mr Boyd posted as it is the other side. Gene's photo is certainly the passenger side. As you stated pictures of the brake assembly should also say which side it is. Some shop manuals are a cause for head scratching trying to decide which side you are looking at. While most identify it.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] rear brake ? [message #175615 is a reply to message #175613] |
Thu, 05 July 2012 10:27 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Gene has already made the change to the caption on his site and it is now labeled "passenger side".
Emery Stora
On Jul 5, 2012, at 9:21 AM, roy@gmcnet.org wrote:
>
>
> [quote title=emerystora wrote on Wed, 04 July 2012 19:24]No, Roy. I meant the passenger side.
>
> Here is the picture that Gene posted:
>
> http://www.gmcmhphotos.com/photos/disk-brakes/p3465.html
>
> The shoe with the shorter material is on the right (front) and the parking brake cable looks to be on the right as well.
> Both of these tell me that the picture is taken of the passenger side.
>
> Emery Stora
>
> On Jul 4, 2012, at 7:53 PM, mailto:roy@gmcnet.org wrote:
>
>>
>>
>> emerystora wrote on Wed, 04 July 2012 18:09
>> You should put a caption on that picture saying that it is on the passenger side.
>>>
>>>
>>>
>>> Emery
>>>
>>> I believe you meant to say the left or drivers side.
>>> --
>>> Roy Keen
>>> Minden,NV
>>> 76 X Glenbrook
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>
> Yep I figured it out I was thinking you were talking about the first photo that Mr Boyd posted as it is the other side. Gene's photo is certainly the passenger side. As you stated pictures of the brake assembly should also say which side it is. Some shop manuals are a cause for head scratching trying to decide which side you are looking at. While most identify it.
> --
> Roy Keen
> Minden,NV
> 76 X Glenbrook
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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