| stuck brake shoe? Likely cause wheel cyl? [message #169115] |
Thu, 10 May 2012 07:20  |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
Karma: 0
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The left rear wheel on the Revcon froze up several times. It would drag through the grass but become unstuck once it hit pavement.
I pulled it apart to find fairly thick brake shoes and a badly scored brake drum.
It was both shoes- not the parking brake.
What's the most likely cause? Wheel cylinder?
thanks
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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| Re: stuck brake shoe? Likely cause wheel cyl? [message #169118 is a reply to message #169115] |
Thu, 10 May 2012 07:51  |
shawnee
Messages: 422
Registered: February 2004
Location: NC
Karma: 0
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| hertfordnc wrote on Thu, 10 May 2012 08:20 |
The left rear wheel on the Revcon froze up several times. It would drag through the grass but become unstuck once it hit pavement.
I pulled it apart to find fairly thick brake shoes and a badly scored brake drum.
It was both shoes- not the parking brake.
What's the most likely cause? Wheel cylinder?
thanks
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This is definitely something to be concerned about. We had a coach at Bean Station that the left rear disc brake failed and overheated. The rotor was reduced to junk that you could peal apart like a news paper. The rotor was so hot the tire blew out from the heat after they pulled off the road. Fortunately he had a spare tire and could block off the brake line with a connector and plug. I have seen a lot of hot metal but never where the metal would crumble when you picked it up. Might be that a connector and plug would be a good thing to have, just in case. He was fortunate to have some one following and let him know about the problem.
Gene Dotson
74 Canyonlands
www.bdub.net/Motorhome_Enhancements New Windows and Aluminum Radiators
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| Re: [GMCnet] stuck brake shoe? Likely cause wheel cyl? [message #169123 is a reply to message #169116] |
Thu, 10 May 2012 09:11 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Dave,
I reckon Emery's spot on.
Since (probably) none of us is familiar with the way the rear brakes on a
Revcon work I would suggest removing the other three drums and checking
everything out.
Also I would replace all the rubber lines to the front and rear brakes.
Regards,
Rob M.
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Emery Stora
Sent: Thursday, May 10, 2012 10:33 PM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] stuck brake shoe? Likely cause wheel cyl?
Or perhaps a collapsed break hose which might be acting as a check valve
keeping pressure on the wheel cylinder.
Emery Stora
On May 10, 2012, at 6:20 AM, dave silva <admin@oldrv.net> wrote:
>
>
> The left rear wheel on the Revcon froze up several times. It would drag
through the grass but become unstuck once it hit pavement.
>
> I pulled it apart to find fairly thick brake shoes and a badly scored
brake drum.
>
> It was both shoes- not the parking brake.
>
> What's the most likely cause? Wheel cylinder?
>
> thanks
>
> --
> Dave & Ellen Silva
>
> 1972 Revcon Olds 455, toro drive train. All Stock
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
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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] stuck brake shoe? Likely cause wheel cyl? [message #169128 is a reply to message #169123] |
Thu, 10 May 2012 11:59 |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
Karma: 0
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| Robert Mueller wrote on Thu, 10 May 2012 09:11 |
Dave,
I reckon Emery's spot on.
Since (probably) none of us is familiar with the way the rear brakes on a
Revcon work I would suggest removing the other three drums and checking
everything out.
Rob M.
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Near as I can tell, both sytems are pretty much the same. But i only have two wheels in back.
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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| Re: [GMCnet] stuck brake shoe? Likely cause wheel cyl? [message #169132 is a reply to message #169128] |
Thu, 10 May 2012 12:23 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Both shoes are used with the emergency brake, so do not over look the possibility of an e-brake problem.
It is also common for a rust film to form on both rotors and drums when parked. It the e-brake is engaged the shoes (or pads) will sometimes stick.
I'm not discounting the brake hose as your problem. I'm just suggesting another possibility.
Ken B.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: stuck brake shoe? Likely cause wheel cyl? [message #169133 is a reply to message #169115] |
Thu, 10 May 2012 12:32 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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A leaking cyl CAN cause that as well. Ask me how I know. The brake fluid keeps the brake waste material from going away as dust and makes a cement like compound that packs up on the friction material and as a glaze coating on the drum. Two things cannot occupy the same space at same time and it acts like way over adjusted rear shoes. Happend most recently on G body Regal and just touching the brakes would cause the right rear to lock as it was almost ready to without the brakes on. Walking by the rear wheel after a short low speed test drive in the neighborhood, the heat coming off the drum was like standing next to a radiator, so high speed driving would have resulted in melt down. Glad I cought it. Drag is... on those cars the backing plates are not pre knocked out for the deadjuster tool so you have to hammer them out first to deadjsut and get the drum off.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: [GMCnet] stuck brake shoe? Likely cause wheel cyl? [message #169144 is a reply to message #169134] |
Thu, 10 May 2012 13:28 |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
Karma: 0
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| WD0AFQ wrote on Thu, 10 May 2012 12:33 |
Dave's problem is two fold. He has not paid close attention to our discussions on brake hoses. AND, he does not drive his coach, just looks at it.
Dan
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THere is WAY too much truth in that statement. And it's not likely to change much. We are heading to Ethiopia this summer for our second adoption. So no money and no time for the foreseeable future. But sooner or later this will be a fine vehicle to show to little boys (and the bride) this wonderful country.
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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| Re: [GMCnet] stuck brake shoe? Likely cause wheel cyl? [message #169150 is a reply to message #169149] |
Thu, 10 May 2012 14:38 |
hertfordnc
Messages: 1164
Registered: September 2009
Location: East NC
Karma: 0
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Senior Member |
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Too Late. We brought the first one home three years ago.
We need to get him a brother or he will run us ragged.
You're younger than me? 1960 ?
Dave & Ellen Silva
Hertford, NC
76 Birchaven, 1-ton and other stuff
Currently planning the Great american Road Trip Summer 2021
It's gonna take a lot of Adderall to get this thing right.
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