Paul=20
Thanks so much for your reply. I have an Auto Zone within view so I had
these items in hand within a few minutes of your email. The only thing that
was different was the Banjo Bolt. 313935 was too large in diameter for the
hose or the caliper but 313934 was correct. Of course they may have had
them mixed up in the inventory.
Now on to the next challenge, how to bring the knuckles and hubs into
tolerance for bearings. I understand they can be metallized but the prices
that the suppliers are getting for rebuilts are tough.
Thanks again
Bill Hubert
>Bill:
>
>Parts, from Autozone (price does not include tax), you'll need to change
>over to 80 mm caliper's on the front wheels are:
>
> 2 ea Banjo bolt, p/n 313935, $1.89
> 1 ea Caliper, left side, p/n 90185, $12.99 + core charge ($17.00)
> 1 ea right side, p/n 90184, price same as above
> 4 ea mounting bolt, p/n H5002, $3.39
> 1 ea Brake pad set, p/n 1534, $37.99 (these are Performance
>Friction carbon metallic pads)
> 1 ea Flexible hose, left side, p/n 77320, $24.99
> 1 ea right side, p/n 77421, price same as above
> 2 ea bracket clip, p/n H1457, $1.29
> 2 ea jam nut (don't have AutoZone number for
>this)
> 2 ea bolt and nut, ss, =BC x 1" (not an AutoZone item)
>
>If you still need it, I have the original caliper at home and can get a
>piston measurement after work tonight for you.
>
>One of the benefits of going with an 80 mm caliper is it applies, I'm told,
>approximately 1000 psi more braking force vs. original caliper. The
>difference is noticeable.
>
>Although there was some degree of controversy on this subject a number of
>months back, you may want to consider going to a larger master cylinder if
>making the switch to larger the calipers. If so, it's available from
>Autozone, p/n 10166, $53.43, and does require an ~ 0.010" longer brake rod
>(p/n GM 5469384)(between master cylinder and brake booster) as well as a
>modified mounting bracket. If you need further details on this
>modification, let me know.
>
> Paul Bartz
>
>From: William Hubert [mailto:whubert]
>Sent: Wednesday, May 19, 1999 7:21 AM
>Subject: Re: GMC: 80 mm Brake Calipers
>
>Thanks for the info. The modifications to fit larger 80 mm caliper pistons
>seem simple. The site gave a great description of WHAT to to do but BUT not
>a clue as to the actual part numbers or even from what vehicle application
>these parts came from I would appreciate any input from anyone who has done
>this operation as to its effectiveness. Was it worth the effort or is=
change
>for change sake.
>I do have a time line on this question as I am about to reassemble the
>brakes with new std calipers and hoses, but I can return them and get the
>other parts if that makes sense and I COULD FIND OUT WHICH PARTS TO GET.
>Bill,
>Common upgrade, go to
>
http://gmcmotorhome.com/commodore/front_brake/index.html and see how it is
>done. =20
>J.R. Wright
>I read about modifying an existing caliper assembly to allow it to be=
fitted
>to GMC.
>My questions
>1. What is application for this caliper or
>2. What is apart number and manufacturer for this caliper.
>3. What is application or part number for brake hose to work withis=
caliper?
>4. What is diameter of original caliper piston?
>Any help on these will be much appreciated.
>Bill Hubert
>
>
