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| Re: [GMCnet] Drum brakes [message #329024 is a reply to message #329021] |
Sat, 10 February 2018 10:48   |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma:
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Senior Member |
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Once one understands how the GM caliper with the paarking brake functions,
like Jim H tates, they work.
Many years ago people stated that they could not get them to work,
After asking several, I ran int Walt Halley that said they do IF you know
what to do. Well, I had to chase him around for a whole day till he finally
showed me why others could not mak it work.
It requires short stud on the pad which prevents the piston from rotating.
Without this the caliper will not adjust and the braking become very poor.
John Bush and Rick Flanagan worked on the parking caliper system for us and
John came up with a simple and inexpensive solution which works.
On Sat, Feb 10, 2018 at 8:26 AM, James Hupy wrote:
> Didn't want to get into the math, thought EVERYONE would get a visual image
> of stiletto heels on their back.
> Same amount of hydraulic pressure applied to a larger surface area,
> results in less pressure per square inch. Less friction between the drum
> and shoes. Does the increased shoe area at less pressure per square inch
> equal less shoe area at the same pressure? You discuss that one. I think
> that there is no advantage to more lining area at the same pressure. Wear
> rate? If there is less friction, linings might not wear as quickly.
> The whole deal with brakes is to convert kinetic energy into heat
> energy. Simply put, rotors and calipers simply do a much better job of
> that. Heat transfer to the airstream is better, too, so less chance of
> brake fade in heavy use. Like motor homes equipped with car brakes.
> I have installed Buick/Cadillac calipers with cable operated caliper
> pistons on GMC'S for parking brakes. They will work, properly installed and
> adjusted. And they meet D.O.T. regulations.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>
> On Feb 10, 2018 8:06 AM, "Emery Stora" wrote:
>
>> What was I supposed to learn? Wider is better for pain in a message. How
>> does this translate to “wider ain’t better” for brakes?
>>
>> Yes, you have less pounds/ sq inch with wide shoes but you have more sq
>> inches so the braking force is the same.
>>
>> You should get less wear on the shoes though. Probably not enough to
>> justify any additional cost.
>>
>> Emery Stora
>> 77 Kingsley
>> Frederick, CA
>>
>>> On Feb 10, 2018, at 8:51 AM, James Hupy wrote:
>>>
>>> Think about a masseur walking up and down your back, barefoot. Got
> that?
>>> Now think about the same person walking the same way, this time in
>> stiletto
>>> heels. Which would you prefer? Now, apply what you have learned from
>> this
>>> example to drum brake shoes. Wider ain't better.
>>> Jim Hupy
>>> Salem, Or
>>> 78 GMC ROYALE 403
>>>
>>>> On Feb 10, 2018 7:45 AM, "Wally Anderson"
>> wrote:
>>>>
>>>> palerider wrote on Fri, 09 February 2018 21:57
>>>> > I seem to remember a long time ago reading about re-placing the rear
>>>> brakes shoes with larger, wider shoes and drums. Using all stock GM
>> stuff.
>>>> > Maybe from truck, van etc. Anyone have that knowledge stored
> anywhere
>>>> in their gray matter? Thanks.....Tom
>>>>
>>>> Tom Hampton at Grandview has wide shoe setups
>>>> http://www.grandviewmotorhome.com/partsupgrades.html
>>>> http://www.grandviewmotorhome.com/partsupgrades.html
>>>> --
>>>> Wally Anderson
>>>> Omaha NE
>>>> 75 Glenbrook
>>>> Megasquirt III injection
>>>> Bob Stone hydroBOOOOST
>>>> Manny reaction arm system
>>>> Branscombe Kelsey Hayes park brake
>>>> http://wallyandsue.blogspot.com/
>>>>
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--
Jim Kanomata
Applied/GMC, Newark,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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