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[GMCnet] Installing P30 Master Cyl. HELP [message #208972]

Mon, 27 May 2013 17:31

BobDunahugh

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Registered: October 2010
Location: Cedar Rapids, IA

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Do you get adapters for the brake lines? Or do you switch them from front to back. And back to front? Bob Dunahugh 78 Royale
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Re: [GMCnet] Installing P30 Master Cyl. HELP [message #208973 is a reply to message #208972]

Mon, 27 May 2013 17:41

WD0AFQ

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Registered: November 2004
Location: Dexter, Mo.

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Bob, you swap the lines. Front goes to back and back one goes to front.
Dan

3 In Stainless Exhaust Headers One Ton All Discs/Reaction Arm 355 FD/Quad Bag/Alum Radiator Manny Tran/New eng. Holley EFI/10 Tire Air Monitoring System Solarized Coach/Upgraded Windows Satelite TV/On Demand Hot Water/3Way Refer

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Re: [GMCnet] Installing P30 Master Cyl. HELP [message #208976 is a reply to message #208972]

Mon, 27 May 2013 18:03

kerry pinkerton

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Registered: July 2012
Location: Harvest, Al

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What Dan said.

Kerry Pinkerton - North Alabama Had 5 over the years. Currently have a '06 Fleetwood Discovery 39L

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[GMCnet] FW: Installing P30 Master Cyl. HELP [message #208981 is a reply to message #208972]

Mon, 27 May 2013 18:34

BobDunahugh

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Registered: October 2010
Location: Cedar Rapids, IA

Karma: 11

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Thanks Dan and Kerrry. We're leaving Wed AM for the Twin Cities. Bob Dunahugh 78 Royale
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Re: [GMCnet] Installing P30 Master Cyl. HELP [message #208982 is a reply to message #208972]

Mon, 27 May 2013 18:49

Messages: 1262
Registered: September 2009

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The first time I installed a 34mm MC, I swapped the lines. A real
pain to do and the bigger one was just too much in the way. I was
also worried about damaging the lines by bending them.

Then I decided to re-install the 1-1/4 MC and ended up bending
them back. When that MC didn't prove to be adequate, I put a 34mm back on,
but didn't want to bend the lines again. That left the lines in the
original location, so I hunted down the adapters.
They are Autozone BLF-21C and BLF-26C.

Since the reservoirs are the same size on the 34mm and there are
no residual check valves or such on the inside, it doesn't matter
which reservoir is in front or back. Other folks have also run
with it this way to no ill effect.

See: http://www.machinesoflovinggrace.net/gmc/brakes/MasterCylinders.html

Karen
1973 23'
1975 26'

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Karen 1975 26' San Jose, CA

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Re: [GMCnet] Installing P30 Master Cyl. HELP [message #208998 is a reply to message #208972]

Mon, 27 May 2013 20:50

powerjon

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Registered: January 2004

Karma: 5

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Here is a picture of the swapped fittings.

http://www.gmcmhphotos.com/photos/cadilac-disk-brakes/p3729.html

JR Wright
78 Buskirk Stretch
Michigan

On May 27, 2013, at 6:31 PM, Bob Dunahugh <yenko108@hotmail.com> wrote:

> Do you get adapters for the brake lines? Or do you switch them from front to back. And back to front? Bob Dunahugh 78 Royale
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist

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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] Installing P30 Master Cyl. HELP [message #209000 is a reply to message #208998]

Mon, 27 May 2013 21:22

WD0AFQ

Messages: 7111
Registered: November 2004
Location: Dexter, Mo.

Karma: 207

Senior Member

AND Bob, don't be afraid to air up those tires on the Eagles.
Have a great trip.
Dan

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