Home » Public Forums » GMCnet » master cylinder and power assist (need information for interchange)
| master cylinder and power assist [message #260012] |
Mon, 25 August 2014 10:23  |
scheibejn
Messages: 35
Registered: March 2013
Location: Stillwater, MN
Karma: 0
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I just joined gmcmi and will soon receive the 2014 parts interchange book. In the meantime, I need to fix the brakes and find out which vehicles/part numbers/etc. will fit my 1977 Kingsley for pretty complete brake job. Disks, drums, pads, bearings seem good. Don't find much specific information for my vehicle - ebay, junk yards, classified and so forth. Need info. For the time being, have given up on my 4106 bus conversion.
Jim Scheibe
Jim Scheibe
1977 Kingsley 26' GMC PD(parlor diesel)4106, 93 Volvo, 96 Volvo,
Oak Park Heights MN 55082
On the gorgeous St. Croix River lookin' at WI shore
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| Re: master cylinder and power assist [message #260015 is a reply to message #260012] |
Mon, 25 August 2014 10:36  |
tphipps
Messages: 3005
Registered: August 2004
Location: Spanish Fort, AL
Karma: 9
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Jim, To get a little ahead of the game. Take off a front wheel and look at the brake hose. If the end is a banjo fitting, P.O. installed 80mm front disks, otherwise front disk brakes are stock. Plenty of information here on the net about the various different solutions to brakes.
While in the junk yards, you might consider picking up a JC4 vacuum pump. These are found on big GMC vehicles, Escalades, Suburbans, etc. In the OEM GMC set-up, if your engine quits providing a vacuum source (shuts down) you only have one push (push with both feet)on the brake pedal to stop your 6 ton mistress. The JC4 vacuum pump senses the vacuum pressure and provides additional vacuum, if the motor quits. These are typically about $25, and probably a hour to install. Mine has activated about 4 times over the past three years, very nice to have. There are other vacuum pumps available, but this one is easily obtained and inexpensive. Look on the net for this installation.
Parts list is your friend. I keep mine in the coach, keeping the previous year's in the car.
If you are going that far into it, you might consider changing the rubber hoses, unless you know that it has been done.
Tom, MS II
2012 Phoenix Cruiser model 2552
KA4CSG
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| Re: master cylinder and power assist [message #260036 is a reply to message #260012] |
Mon, 25 August 2014 13:56 |
Larry
Messages: 2875
Registered: January 2004
Location: Menomonie, WI
Karma: 10
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Senior Member |
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scheibejn wrote on Mon, 25 August 2014 10:23I just joined gmcmi and will soon receive the 2014 parts interchange book. In the meantime, I need to fix the brakes and find out which vehicles/part numbers/etc. will fit my 1977 Kingsley for pretty complete brake job. Disks, drums, pads, bearings seem good. Don't find much specific information for my vehicle - ebay, junk yards, classified and so forth. Need info. For the time being, have given up on my 4106 bus conversion.
Jim Scheibe
Jim,
FWIW, I would encourage you to attend the fall GMCMI convention. See this just posted by Kim Weeks to the forum:
4 Technical Reasons to be at the GMCMI Fall Convention
Brake System Problems and Fixes | Dave Lenzi
The session will be utilizing a test stand consisting of our GMC pedal
assembly, booster, master cylinder, combination valve, caliper, and brake
pads will be utilized to re-create system problems. This "hands on" video
presentation will be displayed "real time" on our large screen so all can
see.
This session is likely to give you most of the information that you need to do your brake job.
Larry 
78 Royale w/500 Caddy
Menomonie, WI.
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| Re: master cylinder and power assist [message #260040 is a reply to message #260036] |
Mon, 25 August 2014 14:41 |
scheibejn
Messages: 35
Registered: March 2013
Location: Stillwater, MN
Karma: 0
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Member |
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Larry wrote on Mon, 25 August 2014 13:56scheibejn wrote on Mon, 25 August 2014 10:23I just joined gmcmi and will soon receive the 2014 parts interchange book. In the meantime, I need to fix the brakes and find out which vehicles/part numbers/etc. will fit my 1977 Kingsley for pretty complete brake job. Disks, drums, pads, bearings seem good. Don't find much specific information for my vehicle - ebay, junk yards, classified and so forth. Need info. For the time being, have given up on my 4106 bus conversion.
Jim Scheibe
Jim,
FWIW, I would encourage you to attend the fall GMCMI convention. See this just posted by Kim Weeks to the forum:
4 Technical Reasons to be at the GMCMI Fall Convention
Brake System Problems and Fixes | Dave Lenzi
The session will be utilizing a test stand consisting of our GMC pedal
assembly, booster, master cylinder, combination valve, caliper, and brake
pads will be utilized to re-create system problems. This "hands on" video
presentation will be displayed "real time" on our large screen so all can
see.
This session is likely to give you most of the information that you need to do your brake job.
Thanks Larry,
I will make it to at least part of the convention - especially that brake session. The new/old motorhome will likely not make it, but the old Volvo station wagon should make it across the river (St. Croix) and on to the convention when I don't have conflicts. I made it to your place and Chippewa Falls will not be that much more of a challenge. This is a marvelous message system, but I may not have mastered it yet.
Jim Scheibe
Jim Scheibe
1977 Kingsley 26' GMC PD(parlor diesel)4106, 93 Volvo, 96 Volvo,
Oak Park Heights MN 55082
On the gorgeous St. Croix River lookin' at WI shore
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