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#40806 06/28/2003 4:30 PM | Joined: Mar 2003 Posts: 5 Member | | Member Joined: Mar 2003 Posts: 5 | I just got a bracket and dual chambered nonpower master cyl for stock drum brakes on my 54 3600.Does anybody know the correct configuration of the lines and which ones hook up where on the new master cyl? Thanks,John
John
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#40807 06/28/2003 8:34 PM | Joined: Jul 2000 Posts: 504 Member | | Member Joined: Jul 2000 Posts: 504 | The word correct kind of goes out the window when you install a dual master.. If you have a drum/drum master cylinder, the chambers should both be the same size. One chamber port goes to the front, the other to the rear..
On my truck, I started at the master and ran the line down the right side of the frame to the rear axle, tee'd into the rear brake hose, to the right wheel then over the hump to the left wheel.
In the front I ran from the master to a tee , then on to each front brake hose.
I bought rubber covered clamps from NAPA that worked out great to secure the lines against the frame..
Bill M
53 GMC Hydra-Matic
Home Page
http://home.comcast.net/~bd97/index.html
When you argue with a fool, two fools are arguing..
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#40808 06/30/2003 5:54 AM | Joined: Jan 2002 Posts: 32 Member | | Member Joined: Jan 2002 Posts: 32 | On my 54 3100 with a dual m/c kit no power assist. Th rear port of the M/c feeds the rear wheels. | | |
#40809 06/30/2003 7:35 AM | Joined: Nov 2001 Posts: 122 Shop Shark | | Shop Shark Joined: Nov 2001 Posts: 122 | John,
I just read an article in Custom Classic Trucks about just such an upgrade. The only difference is that truck was a '56. One problem they pointed out is that if you hooked up the apparent rear brake line to the rear chamber of the master cylinder and the front chamber to the apparent front brake line then the truck pulled hard to the left. The reason for this, they discovered, was that the original brake plumbing takes a line to the left front brake and the other line, that appears to be the rear line, runs to a "T" on the right side of the frame and is attached to the rear brakes and the right front brake. I checked my factory assembly manual, (sect. 5 sheet 6.00), and it appears that the '54's are plumbed the same way. So, to get it right you'll have to re-plumb the front lines together and cap off the part of the "T" that would run to the right front brake. That way you’ll have two brakes on each chamber instead of one on one and three on the other. Good luck with it. | | |
#40810 07/01/2003 2:13 AM | Joined: Mar 2003 Posts: 5 Member | | Member Joined: Mar 2003 Posts: 5 | 54 gmc, Boy you sure are right! Pulls to the left is an under statement!Good thing I was on a quiet country road.But I got it figured out now.Thanks guys for the help. John
John
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