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| rear brakes [message #297233] |
Sat, 12 March 2016 22:48  |
Harry
Messages: 1888
Registered: October 2007
Location: Victoria, BC CANADA
Karma: 3
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Senior Member |
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I'm putting the rear brakes back together but do not have a real clear picture of how they go.
Can someone lead me to a photo of these?
It's a 1973 model.
Thank you.
DJ
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| Re: [GMCnet] rear brakes [message #297237 is a reply to message #297233] |
Sat, 12 March 2016 23:13  |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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David,
Do you have access to Rob's excellent reproductions of the 75-76
Maintenance Manual? If so, page 5-19, Fig 11 is an excellent illustrated
parts breakdown. Page 5-24, Fig 29 is an excellent photo of the brake
assembly.
I don't think there are any significant differences from the '73.
If you don't have them, I'll send them to you off-line.
Ken H.
On Sat, Mar 12, 2016 at 11:48 PM, David H. Jarvis wrote:
> I'm putting the rear brakes back together but do not have a real clear
> picture of how they go.
> Can someone lead me to a photo of these?
> It's a 1973 model.
> Thank you.
> DJ
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] rear brakes [message #297238 is a reply to message #297237] |
Sat, 12 March 2016 23:29 |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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Here is a good picture of the rear drum brakes.
http://www.gmcmhphotos.com/photos/disk-brakes/p3465.html
J.R. Wright
GMC GreatLaker
Newsletter Editor/Publisher
Tech Editor
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan
> On Mar 12, 2016, at 10:13 PM, Ken Henderson wrote:
>
> David,
>
> Do you have access to Rob's excellent reproductions of the 75-76
> Maintenance Manual? If so, page 5-19, Fig 11 is an excellent illustrated
> parts breakdown. Page 5-24, Fig 29 is an excellent photo of the brake
> assembly.
>
> I don't think there are any significant differences from the '73.
>
> If you don't have them, I'll send them to you off-line.
>
> Ken H.
>
>
> On Sat, Mar 12, 2016 at 11:48 PM, David H. Jarvis wrote:
>
>> I'm putting the rear brakes back together but do not have a real clear
>> picture of how they go.
>> Can someone lead me to a photo of these?
>> It's a 1973 model.
>> Thank you.
>> DJ
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] rear brakes [message #297240 is a reply to message #297237] |
Sun, 13 March 2016 00:19 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Ken,
The manuals were mine but Peer Schmidt did the scanning.
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: Ken Henderson
David,
Do you have access to Rob's excellent reproductions of the 75-76
Maintenance Manual? If so, page 5-19, Fig 11 is an excellent illustrated
parts breakdown. Page 5-24, Fig 29 is an excellent photo of the brake
assembly.
I don't think there are any significant differences from the '73.
If you don't have them, I'll send them to you off-line.
Ken H.
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] rear brakes [message #297263 is a reply to message #297238] |
Sun, 13 March 2016 11:34 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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Senior Member |
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Good picture, John.
As it says, it is the passenger side. The driver’s side would be reversed.
For those doing their own work. 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.
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
> On Mar 12, 2016, at 10:29 PM, John Wright wrote:
>
> Here is a good picture of the rear drum brakes.
>
> http://www.gmcmhphotos.com/photos/disk-brakes/p3465.html
>
> J.R. Wright
> GMC GreatLaker
> Newsletter Editor/Publisher
> Tech Editor
> 78 Buskirk 30' Stretch
> 75 Avion Under Reconstruction
> Michigan
>
>> On Mar 12, 2016, at 10:13 PM, Ken Henderson wrote:
>>
>> David,
>>
>> Do you have access to Rob's excellent reproductions of the 75-76
>> Maintenance Manual? If so, page 5-19, Fig 11 is an excellent illustrated
>> parts breakdown. Page 5-24, Fig 29 is an excellent photo of the brake
>> assembly.
>>
>> I don't think there are any significant differences from the '73.
>>
>> If you don't have them, I'll send them to you off-line.
>>
>> Ken H.
>>
>>
>> On Sat, Mar 12, 2016 at 11:48 PM, David H. Jarvis wrote:
>>
>>> I'm putting the rear brakes back together but do not have a real clear
>>> picture of how they go.
>>> Can someone lead me to a photo of these?
>>> It's a 1973 model.
>>> Thank you.
>>> DJ
>>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] rear brakes [message #297277 is a reply to message #297267] |
Sun, 13 March 2016 17:54 |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Senior Member |
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Jim's suggestion to photograph before disassembly is a lifesaver. Helps me figure out where everything started out and gets it back where it belongs. P.O. Did strange stuff, and I seem to send an inordinate amount of time trying to see where he went with his improvements.
Tom, MS II
See you in Dothan - 23 days and counting down.
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: [GMCnet] rear brakes [message #297279 is a reply to message #297262] |
Sun, 13 March 2016 18:07 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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Senior Member |
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This is the sort help I always expect to see here, and Emery's long shoe to the rear is something I was taught years ago. Even with 50(+/-) years doing drum breaks, those self adjusters are still confound me. Last spring when I got them all bollixed up. I found the picture that I had taken (I take a lot), but it was for the wrong side, so was the picture in the manual. So, I grabed it up with my picture fixer and printed the mirror of it. Then I went back out to finish the job.
Matt
James Hupy wrote on Sun, 13 March 2016 12:28David, what you might find helpful upon reassembly of complex mechanisms like brakes is a series of pictures taken with your cell phone before you take them apart. This will help you to remember how they were assembled, not necessarily the way that they should have been assembled. On 40 year old stuff, others have been there before you.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Mar 13, 2016 9:21 AM, "David H. Jarvis" wrote:
> powwerjon, Thank you. That is all I need.
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
[Updated on: Sun, 13 March 2016 18:08] Report message to a moderator |
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| Re: [GMCnet] rear brakes [message #297285 is a reply to message #297277] |
Sun, 13 March 2016 19:08 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Tom,
I don't have to do that as I am blessed with a pornographic memory! :-)
Regards,
Rob M.
The Pedantic Mechanic
-----Original Message-----
From: Thomas Phipps
Jim's suggestion to photograph before disassembly is a lifesaver. Helps me figure out where everything started out and gets it back
where it belongs.
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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