Brake Job

[phil swanson]

Hello,

I am in the process of replacing the front wheel bearings in my 1973
Canyon Lands and while I am at it, I thought I'd replace the brake
linings, turn the rotors,etc. Does anyone know if the Performance
Friction Carbon Metallic Pads are available for the motor homes? It's
always been a good high performance pad on other applications. I'm not
at all worried about increase rotor wear, a small price to pay for super
stopping power.
Also, I was wondering which ball joint is the loaded joint, i.e.
upper or lower? I think I'll change these out and rebuild the final
drive axle assemblies while I am in there. I had one heck of a time
braking the 1 1/2 inch front axle nuts loose. It took a 3/4 " drive
socket and breaker bar with a five foot cheater bar and even then it
didn't want to come loose. I figure with all this effort, I might as
well do the works while I'm in there. The coach has just 79K miles on it
but like many others gh\has been sitting extensively. Thanks for any
information you could provide. Hopefully someone will talk to brakes and
front suspension at Vegas also.

Phil Swanson

 

[scott woodworth]

Phil,

The lower ball joints carry the load. I don't see any reason why
Performance
Friction Carbon Metallic Pads would cause accelerated brake rotor wear.
Part number 2154 is specified for the GMC. A set will cost you $43.56.
Why don't you visit their most excellent website and check it out for
yourself:

http://www.performancefriction.com/highway/Highway01.htm

- -Scott Woodworth

 

[patrick flowers]

>
> I am in the process of replacing the front wheel bearings in my
> 1973 Canyon Lands and while I am at it, I thought I'd replace the
> brake linings, turn the rotors,etc.

You might consider changing to the larger calipers(from '79-86 Chevy 3/4
ton truck). They take the #0524 pads from Performance Friction.
According to Jim Anstett, there is a small "boss" that must be ground
off the caliper, but otherwise it's a direct swap. Ray Curtis at Eaton
GMC sells the calipers already modified and the Performance pads. This
also requires changing the flexible hoses(not a bad idea anyway - they
have been known to collapse internally causing the caliper to drag),
also available from Ray.

This was not intended to be a commercial for Eaton GMC, but if you call
Ray (800-764-3673), he will send you a reprint of Jim Anstett's GMCMM
article about upgrading the brakes and a price list of all the required
parts.

Caveat - Any alterations to your brake system using parts not certified
as part of the system voids DOT certification. I'm neither encouraging
you to make these alterations nor certifying their safety or
effectiveness. I'm just letting you know that the information is "out
there".

Sorry for the legalese, but it's a strange society we live in these
days.

Patrick
- --
Patrick Flowers
Mailtoatri63

The GMC Motorhome Page
http://www.gmcmotorhome.com

 

[bartz paul]

Here are the part numbers I have for changing to larger front wheel
calipers:

80 mm caliper:

GM NAPA Wagner

Left side 18015385 42-2072 CR98955
Right side 18015386 42-2073 CR98954

Caliper mounting bolt:

5468228 F98435

Flexible hose:

Left side 9762801 36-952 F110424
Right side 9762802 36-957 F110425

If changing to a larger caliper, there is some additional hardware
needed (e. g. 1/4 " ss bolt and nut to secure the hoses, 1/2 " washer
for the upper ball joint (replaces the original flex hose mounting tab),
hose jam nut, crush washers and bolt to secure the hose to the caliper).

Having given the above info, a larger master cylinder (from the Chevy
P-30 chassis) and adjustable brake rod (goes in the chamber between the
master cylinder and the brake booster) (or a rod cut to length),
increased, I believe, 0.010 " greater than the original length, is
required.

Master cylinder (34 mm):

14009146 39-622 F103239

A master cylinder mounting bracket needs to be fabricated in addition.
Help on that requirement is available upon request.

Now, are you still interested???????

Paul Bartz




> -----Original Message-----
> From: Patrick Flowers [SMTPatri63]
> Sent: Tuesday, March 17, 1998 8:24 AM
> To: gmcmotorhome
> Subject: Re: GMC: Brake Job
>

>
> I am in the process of replacing the front wheel bearings in my 1973
> Canyon Lands and while I am at it, I thought I'd replace the brake
> linings, turn the rotors,etc.
>
> You might consider changing to the larger calipers (from '79-86 Chevy
> 3/4 ton truck). They take the #0524 pads from Performance Friction.
>
> According to Jim Anstett, there is a small "boss" that must be ground
> off the caliper, but otherwise it's a direct swap. Ray Curtis at
> Eaton GMC sells the calipers already modified and the Performance
> pads. This also requires changing the flexible hoses (not a bad idea
> anyway - they have been known to collapse internally causing the
> caliper to drag), also available from Ray.
>
> This was not intended to be a commercial for Eaton GMC, but if you
> call Ray (800-764-3673), he will send you a reprint of Jim Anstett's
> GMCMM article about upgrading the brakes and a price list of all the
> required parts.
>
> Caveat - Any alterations to your brake system using parts not
> certified as part of the system voids DOT certification. I'm neither
> encouraging you to make these alterations nor certifying their safety
> or effectiveness. I'm just letting you know that the information is
> "out there".
>
> Sorry for the legalese, but it's a strange society we live in these
> days.
>
> Patrick