| Wallace Hubs and 80 MM calipers [message #306955] |
Sun, 11 September 2016 14:10  |
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Hueland
Messages: 15
Registered: February 2004
Location: Oak Park, IL
Karma: 0
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Junior Member |
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I had an OEM Caliper seize on my coach about a year ago and am just now addressing it. Thanks to Ken Burton's assistance over the phone, I was able to get back rolling and make it home.
I'm looking to upgrade the calipers to 80 mm ones and beyond the little tab that needs to be ground down on the caliper, I can not get the new calipers to fit on my wallace hubs, and then thought perhaps wallace hubs are physically different. Do any of you more familiar with them know if they are a different hub all together? I guess it could be I have incompatable 80mm calipers, though when I bought them (yes a year ago) they cross referenced with known, adaptable calipers.
Thanks,
Rick
Rick Boultinghouse
Oak Park, IL
77 Kingsley
F 61869 D
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| Re: [GMCnet] Wallace Hubs and 80 MM calipers [message #306969 is a reply to message #306968] |
Sun, 11 September 2016 17:58  |
powerjon
Messages: 2446
Registered: January 2004
Karma: 5
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Senior Member |
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Whenever you add the 80 MM calipers to the front you must grind as Jim said on the housing to remove the cast “boss” left of center above the piston.
See this album on what is needed to make the calipers fit.
http://www.gmcmotorhome.com/commodore/front_brake/index.html
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
> On Sep 11, 2016, at 6:48 PM, Jim Kanomata wrote:
>
> You need to grind off the nodules on the 80 mm calipers. A standard
> procedure.
> Wallace hubs has no influence on the caliper.
>
> On Sun, Sep 11, 2016 at 3:36 PM, Rick Boultinghouse hboultinghouse@gmail.com> wrote:
>
>> These calipers must be different. I get to research this further, now.
>>
>> Thanks much!
>>
>> Rick
>> --
>> Rick Boultinghouse
>> Oak Park, IL
>> 77 Kingsley
>> F 61869 D
>>
>> _______________________________________________
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>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: [GMCnet] Wallace Hubs and 80 MM calipers [message #306975 is a reply to message #306973] |
Sun, 11 September 2016 18:33 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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We have not had problems with pads.
Sometime we trim the Knuckle to clear as well. The pads are all the same.
On Sun, Sep 11, 2016 at 4:28 PM, Rick Boultinghouse <
hboultinghouse@gmail.com> wrote:
> powerjon and Jim,
>
> I did grind down those little tabs. These calipers would not line up with
> the mounting holes in spite of that, without absolutely pushing the brake
> pads into the CV boot on the inside and the hub on the outside. The 80 mm
> calipers are supposed to use OEM compatible pads, correct?
>
> Rick
> --
> Rick Boultinghouse
> Oak Park, IL
> 77 Kingsley
> F 61869 D
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Jim Kanomata
Applied/GMC, Fremont,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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| Re: [GMCnet] Wallace Hubs and 80 MM calipers [message #306976 is a reply to message #306968] |
Sun, 11 September 2016 18:36 |
jimk
Messages: 6734
Registered: July 2006
Location: Belmont, CA
Karma: 9
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Senior Member |
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If you look closely, you'll find that the Knuckle might have excess webbing
that need to be ground down.
On Sun, Sep 11, 2016 at 4:33 PM, Jim Kanomata wrote:
> We have not had problems with pads.
> Sometime we trim the Knuckle to clear as well. The pads are all the same.
>
> On Sun, Sep 11, 2016 at 4:28 PM, Rick Boultinghouse hboultinghouse@gmail.com> wrote:
>
>> powerjon and Jim,
>>
>> I did grind down those little tabs. These calipers would not line up
>> with the mounting holes in spite of that, without absolutely pushing the
>> brake
>> pads into the CV boot on the inside and the hub on the outside. The 80
>> mm calipers are supposed to use OEM compatible pads, correct?
>>
>> Rick
>> --
>> Rick Boultinghouse
>> Oak Park, IL
>> 77 Kingsley
>> F 61869 D
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Fremont,CA
> jimk@appliedairfilters.com
> http://www.appliedgmc.com
> 1-800-752-7502
>
--
Jim Kanomata
Applied/GMC, Fremont,CA
jimk@appliedairfilters.com
http://www.appliedgmc.com
1-800-752-7502
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
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Jim Kanomata
Applied/GMC
jimk@appliedairfilters.com
www.appliedgmc.com
1-800-752-7502
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| Re: [GMCnet] Wallace Hubs and 80 MM calipers [message #306982 is a reply to message #306976] |
Sun, 11 September 2016 19:29 |
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Hueland
Messages: 15
Registered: February 2004
Location: Oak Park, IL
Karma: 0
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Junior Member |
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Thanks for the info, Jim. I'll look again to see what is causing my problem. I ran out of daylight and get to pick this back up next weekend.
Rick
Rick Boultinghouse
Oak Park, IL
77 Kingsley
F 61869 D
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