Home » Public Forums » GMCnet » Stock front brake Calipers (part # please)
| Stock front brake Calipers [message #276627] |
Fri, 24 April 2015 10:21  |
Tony Cook
Messages: 121
Registered: August 2014
Location: Torrance CA
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Does anyone know the part #'s for the right and left stock Calipers the one's on bdub site don't really work when i run them. Or do i ask for 70's Toronado Calipers at parts counter and those are the same ? I am replacing all of my brakes parts from springs to hard lines and everything in between was going to do the 80 mm upgrade but i dont want to change the MC since it is brand new .Thanks Tony
Tony Cook
77' Kingsley ' SuperSession 77 '
Torrance Beach,CA
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| Re: Stock front brake Calipers [message #276632 is a reply to message #276627] |
Fri, 24 April 2015 11:12  |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
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There is no need to change the MC to go to 80 mm. calipers.
I have had 80 mm calipers on a standard MC for about 10 years.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: Stock front brake Calipers [message #276633 is a reply to message #276627] |
Fri, 24 April 2015 11:38 |
Tony Cook
Messages: 121
Registered: August 2014
Location: Torrance CA
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Thats good to hear Ken well now maybe wanting to change gears a bit and go with the 80mm upgrade. As far as installing the 80 mm calipers obviously need new banjo style hoses but are these pretty much plugnplay I read maybe a little grinding of the casting and bending of the hose end ? Also are the pads the same for stock and or 80mm. Thanks
Tony Cook
77' Kingsley ' SuperSession 77 '
Torrance Beach,CA
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| Re: Stock front brake Calipers [message #276635 is a reply to message #276633] |
Fri, 24 April 2015 12:05 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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Tony Cook wrote on Fri, 24 April 2015 09:38Thats good to hear Ken well now maybe wanting to change gears a bit and go with the 80mm upgrade. As far as installing the 80 mm calipers obviously need new banjo style hoses but are these pretty much plugnplay I read maybe a little grinding of the casting and bending of the hose end ? Also are the pads the same for stock and or 80mm. Thanks
Same pads. I liked the carbon friction caprice ( police ) pads as they were a little bigger but I think they were discontinued last year. The standard ones are still available from carbon friction however. The 80mm calipers were a worthwhile improvement in my opinion also.
Roy Keen
Minden,NV
76 X Glenbrook
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| Re: [GMCnet] Stock front brake Calipers [message #276661 is a reply to message #276633] |
Fri, 24 April 2015 20:36 |
powerjon
Messages: 2446
Registered: January 2004
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Tony,
You can use the stock master cylinder if all you are doing is upgrading to the 80MM in the front. As for doing the conversion see here:
http://www.gmcmotorhome.com/commodore/front_brake/index.html
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
> On Apr 24, 2015, at 12:38 PM, Tony Cook wrote:
>
> Thats good to hear Ken well now maybe wanting to change gears a bit and go with the 80mm upgrade. As far as installing the 80 mm calipers obviously
> need new banjo style hoses but are these pretty much plugnplay I read maybe a little grinding of the casting and bending of the hose end ? Also are
> the pads the same for stock and or 80mm. Thanks
> --
> Tony Cook
> 77' Kingsley ' SuperSession 77 '
> Torrance Beach,CA
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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] Stock front brake Calipers [message #276698 is a reply to message #276696] |
Sat, 25 April 2015 10:27 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
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Also be sure that the caliper can move through its full range of motion
after the pads are nearly gone.
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc.
www.gmcwipersetc.com
On Sat, Apr 25, 2015 at 10:50 AM, Daniel DeLuca wrote:
> Tony,
>
> I put the 80mm calipers on my 78. It was very straight forward. I did have
> trouble getting the passenger side to fit. I needed to grind the knuckle
> slightly due to interference. This was in addition to grinding the casting
> mark off of the caliper. So if you are having trouble it is something to
> take a look at.
>
> Dan
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: Stock front brake Calipers [message #276717 is a reply to message #276627] |
Sat, 25 April 2015 20:54 |
Tony Cook
Messages: 121
Registered: August 2014
Location: Torrance CA
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Good info ! Also do you guys know the socket size for the castle nut on the front hub gonna pull the rotors off and clean em up but looks like my biggest socket is 1 1/4 and thats too small they are a little crusty !
Tony Cook
77' Kingsley ' SuperSession 77 '
Torrance Beach,CA
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| Re: Stock front brake Calipers [message #276718 is a reply to message #276717] |
Sat, 25 April 2015 20:59 |
C Boyd
Messages: 2629
Registered: April 2006
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1 1/2".
Tony Cook wrote on Sat, 25 April 2015 21:54Good info ! Also do you guys know the socket size for the castle nut on the front hub gonna pull the rotors off and clean em up but looks like my biggest socket is 1 1/4 and thats too small they are a little crusty !
C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] Stock front brake Calipers [message #276723 is a reply to message #276719] |
Sat, 25 April 2015 21:28 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
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Tony,
I don't want to be alarmist, but think carefully, and engage in discussions
here, before you go arbitrarily removing the rotors. As Rob said, you must
remove the hub in order to remove a rotor. The chances are that the hub
will not come out of the bearing but the bearing will come with the hub out
of the knuckle. That MAY be a good thing because it may reveal a loose
bearing in an egg-shaped knuckle, alerting you to a problem. BUT, if you
PULL the bearing from a good knuckle, you may be doing more harm than good:
The bearing should be a slight interference fit in the knuckle -- it never
will be again after it's removed.
If the bearings are original or it's documented that they have been
greased, there's no grease escaping, and there's no obvious play in them
when the tire is "rocked" firmly top-to-bottom, I'd leave them alone.
If you do remove the bearings, they should be carefully examined and
greased. I'd advise installing zerk fittings for future greasings -- as
much to avoid pulling them out of the knuckle again as anything.
By the way, don't try to use a 1/2" drive 1-1/2" socket to remove that axle
nut -- you'll probably break the drive. Go ahead and acquire a 3/4" drive
socket and handle because that 280+ ft-lb + years of rust will probably
require it -- plus a long "helper handle".
Done it too many times -- glad my 1-Ton won't ever require it. :-)
Ken H.
Americus, GA
'76 X-Birchaven w/Cad500/Howell EFI & EBL,
Manny Brakes & 1-Ton, etc., etc.
www.gmcwipersetc.com
On Sat, Apr 25, 2015 at 10:09 PM, Tony Cook wrote:
> Thank you
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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| Re: [GMCnet] Stock front brake Calipers [message #276725 is a reply to message #276717] |
Sat, 25 April 2015 22:28 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Tony, if your rotors still turn true, and are not excessively scored from
running on the backing instead of the linings, just remove the calipers,
refresh the linings, use some 160 grit abrasive cloth and scuff sand the
surfaces of the rotor, (both sides) and run it. Never pull the hubs and
knuckles unless there is a very good reason to do so. When the day arrives,
pull it all out, install a 1 ton front end, and drive the snot out of it.
Jim Hupy
Salem, Or
78 GMC ROYALE 403
On Apr 25, 2015 6:54 PM, "Tony Cook" wrote:
> Good info ! Also do you guys know the socket size for the castle nut on
> the front hub gonna pull the rotors off and clean em up but looks like my
> biggest socket is 1 1/4 and thats too small they are a little crusty !
> --
> Tony Cook
> 77' Kingsley ' SuperSession 77 '
> Torrance Beach,CA
> _______________________________________________
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| Re: [GMCnet] Stock front brake Calipers [message #276735 is a reply to message #276723] |
Sun, 26 April 2015 08:34 |
rjw
Messages: 697
Registered: September 2005
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Ken Henderson wrote on Sat, 25 April 2015 22:28Tony,
By the way, don't try to use a 1/2" drive 1-1/2" socket to remove that axle
nut -- you'll probably break the drive. Go ahead and acquire a 3/4" drive
socket and handle because that 280+ ft-lb + years of rust will probably
require it -- plus a long "helper handle".
Ken,
Good advice. Even 3/4" drive hardware (if it is Chinese) may not be up to the task. I once broke a short 3/4" extension trying to get an axle nut off.
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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| Re: Stock front brake Calipers [message #276736 is a reply to message #276692] |
Sun, 26 April 2015 08:40 |
rjw
Messages: 697
Registered: September 2005
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Tony Cook wrote on Sat, 25 April 2015 10:08Thanks guys 80mm upgrade parts have been ordered
Wondering where you can buy good 80MM calipers?
According to our GMC brake expert (Dave Lenzi) there are no good sources for 80MM calipers anymore. They are mostly all junk. You better check out the calipers you purchased carefully before modifying and installing them
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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| Re: [GMCnet] Stock front brake Calipers [message #276738 is a reply to message #276735] |
Sun, 26 April 2015 08:48 |
rjw
Messages: 697
Registered: September 2005
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rjw wrote on Sun, 26 April 2015 09:34Ken Henderson wrote on Sat, 25 April 2015 22:28Tony,
By the way, don't try to use a 1/2" drive 1-1/2" socket to remove that axle
nut -- you'll probably break the drive. Go ahead and acquire a 3/4" drive
socket and handle because that 280+ ft-lb + years of rust will probably
require it -- plus a long "helper handle".
Ken,
Good advice. Even 3/4" drive hardware (if it is Chinese) may not be up to the task. I once broke a short 3/4" extension trying to get an axle nut off.
I also broke a 3/4" Chinese ratchet during an axle nut removal attempt. After that, I bent a 3/4" Chinese breaker bar, but I finally did get the nut off.
Richard
76 Palm Beach
SE Michigan
www.PalmBeachGMC.com
Roller Cam 455, TBI+EBL, 3.42 FD, 4 Bag, Macerator, Lenzi (brakes, vacuum system, front end stuff), Manny Tranny, vacuum step, Tankless + OEM water heaters.
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| Re: [GMCnet] Stock front brake Calipers [message #276739 is a reply to message #276738] |
Sun, 26 April 2015 09:07 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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Remember guys, lefty loosey, right tighty. (Grin)
Jim Hupy
Salem, Or.
On Apr 26, 2015 6:48 AM, "RJW" wrote:
> rjw wrote on Sun, 26 April 2015 09:34
>> Ken Henderson wrote on Sat, 25 April 2015 22:28
>>> Tony,
>>> By the way, don't try to use a 1/2" drive 1-1/2" socket to remove that
> axle
>>> nut -- you'll probably break the drive. Go ahead and acquire a 3/4"
> drive
>>> socket and handle because that 280+ ft-lb + years of rust will probably
>>> require it -- plus a long "helper handle".
>>
>>
>> Ken,
>> Good advice. Even 3/4" drive hardware (if it is Chinese) may not be up
> to the task. I once broke a short 3/4" extension trying to get an axle nut
>> off.
>
>
> I also broke a 3/4" Chinese ratchet during an axle nut removal attempt.
> After that, I bent a 3/4" Chinese breaker bar, but I finally did get the nut
> off.
> --
> Richard
> 76 Palm Beach
> SE Michigan
> www.PalmBeachGMC.com
>
>
> Coop Roller Cam 455, Howell TBI + EBL, 3.42 FD, Quadra Bag, Macerator,
> Manny Tranny etc.
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
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| Re: Stock front brake Calipers [message #276740 is a reply to message #276627] |
Sun, 26 April 2015 09:48 |
Tony Cook
Messages: 121
Registered: August 2014
Location: Torrance CA
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Well sounds like i dodged a bullet was about to read up about it in the manual this morning but sounds like i will not be pulling the rotors. Wow these BIG GALS are sure a learning experience. I super appreciate you guys and all the help along the way with getting this pup up to snuff. I am in the 'full steam ahead ' mode and this is one of those times where i may need to step back and decompress. I am 90% finished with running all new SS brake lines waiting on one line that had to go back to Classic Tube rear driv side through frame line not correct. But rear brakes done new metering valve done now just front calipers and hoses to do. BTW the 80mm Cals are Cardone so i guess we will see ? Again thanks for the help . Tony
Tony Cook
77' Kingsley ' SuperSession 77 '
Torrance Beach,CA
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| Re: [GMCnet] Stock front brake Calipers [message #276743 is a reply to message #276740] |
Sun, 26 April 2015 11:15 |
Ken Henderson
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma: 9
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Senior Member |
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I just stumbled across a photo that's applicable here. It adds some
confusion, because it specifies a 1-1/4" socket, which both Tony and Chuck
report is incorrect. Since I not longer have this arrangement, I can't
really address it (my 1-Ton uses a 1-7/16" socket). But there are still a
couple of pertinent items here:
http://www.gmcmhphotos.com/photos/greasing-front-bearings-with-zerk-fittings/p19268.html
Ken H.
On Sun, Apr 26, 2015 at 10:48 AM, Tony Cook wrote:
> Well sounds like i dodged a bullet was about to read up about it in the
> manual this morning but sounds like i will not be pulling the rotors. Wow
> these BIG GALS are sure a learning experience. I super appreciate you guys
> and all the help along the way with getting this pup up to snuff. I am in
> the 'full steam ahead ' mode and this is one of those times where i may
> need to step back and decompress. I am 90% finished with running all new SS
> brake lines waiting on one line that had to go back to Classic Tube rear
> driv side through frame line not correct. But rear brakes done new
> metering
> valve done now just front calipers and hoses to do. BTW the 80mm Cals are
> Cardone so i guess we will see ? Again thanks for the help . Tony
> --
>
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
76 X-Palm Beach
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