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| | | | Joined: Apr 2012 Posts: 68 Shop Shark | | Shop Shark Joined: Apr 2012 Posts: 68 | I'm installing a dual reservoir Master Cylinder on my 3/4 ton. Since it's for manual drum brakes do I need a Proportioning Valve? http://www.americanclassic.com/images/BR0106-DB.JPGThanks all!
Me and my '53!
| | | | | Joined: Dec 2001 Posts: 14,522 Moderator: Welcome Centre, Southern Bolters, Legion Hall | | Moderator: Welcome Centre, Southern Bolters, Legion Hall Joined: Dec 2001 Posts: 14,522 | Are they NECESSARY... my answer to that would be NO. Depends on the situation and personal preference and opinions.
.....but I did use them. I have a dual m/c on my panel and plan to go to disk brakes on the front soon. The 10lb residual on the rear is suppose to help over come the spring tension so you have better response time.
Now, lets see what other say! | | | | | Joined: Feb 2000 Posts: 5,228 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,228 | I am with Alvin, not totally needed, but then it doesn't hurt anything either. I use disk/drum with a proportioning valve, no residual valves, and a adjustable porportion valve on the rear. Mine would lock the rears up to quick, so the adjustable valve limits the pressure to the rear. Its harder to push the pedal being manual, but stops just fine. I am not sure the valve I am using up front does much if anything other then alert you if one half of the system fails ( mine is not wired so it doesn't even do that).
Joe | | | | | Joined: Jun 2004 Posts: 8,597 Riding in the Passing Lane | | Riding in the Passing Lane Joined: Jun 2004 Posts: 8,597 | The valve on 4 wheel drum brakes is not really a proportioning valve. Like Joe says it just turns on the warning light when one system fails & pressure is uneven.
They say money can't buy happiness. It can buy old Chevy trucks though. Same thing. 1972 Chevy c10 Cheyenne SuperIn the Gallery Forum | | | | | Joined: Apr 2012 Posts: 68 Shop Shark | | Shop Shark Joined: Apr 2012 Posts: 68 | Thanks all - I have decided to install without the proportioning valve since I never had any real complaints about it's braking previously.
A follow question for you guys:
The original Master Cylinder included a collar that guided the pedal push rod keeping it centered on the plunger. BUT the new Master Cylinder does not have the collar... instead it would appear that the push rod is just expected to be installed snuggly between the heim joint (swivel ball) and this 3/8 dimple on the plunger - does that sound remotely correct or am I missing parts from the vendor??
Thanks again!
Me and my '53!
| | | | | Joined: Apr 2005 Posts: 177 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 177 | sounds like the master cly you have is for power brakes on the manuel brake the rod goes in the cyl about 1" to hold the rod in place | | |
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