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Author Topic: Multifunction brake valve  (Read 3747 times)

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Offline mo.eagles

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Multifunction brake valve
« on: April 12, 2015, 10:43:36 AM »
 Having brake issues. I need the proportioning/balancing/light switch valve .  Has anyone located a good after market replacement?
'85 wagon Limited   tilt wheel , cruise control
power seats ,windows and locks
rear window washer /wiper 
tach and gauge package
A/C
 '85 wagon   power windows and locks
rear window washer/wiper
factory tow package
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Offline carnuck

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Re: Multifunction brake valve
« Reply #1 on: April 12, 2015, 11:26:37 AM »
Every one I have tried in the past 5 years has leaked. I took my valve apart and removed the O-rings then reassembled on my previous wagon. Seemed to work okay. Aside from that, I would look at early XJ ones (without ABS)
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

Offline eaglefreek

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Re: Multifunction brake valve
« Reply #2 on: April 12, 2015, 11:48:11 AM »
What issues are you having?
1986 AMC Eagle Wagon 4.2L/4.0L head, AW4,NP242, Chrysler 8.25" rear.
1981 AMC Eagle Wagon As Seen On TV  Lost In Transmission


 

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Offline mo.eagles

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Re: Multifunction brake valve
« Reply #3 on: April 12, 2015, 03:27:30 PM »
    The dash light does not go out . (had to unplug it to pass inspection)    The brake balance is not right . rears lock some times with lite pedal pressure. I pulled the valve off a project car and put on my daily driver and have similar problem . Tried pulling one apart but its all corroded  and froze . Can't get it apart  with out damaging the internals.                                                                                                           
'85 wagon Limited   tilt wheel , cruise control
power seats ,windows and locks
rear window washer /wiper 
tach and gauge package
A/C
 '85 wagon   power windows and locks
rear window washer/wiper
factory tow package
A/C

Offline casper

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Re: Multifunction brake valve
« Reply #4 on: April 19, 2015, 03:16:19 AM »
Brake prop valves very RARELY have issues. Most brake issues are due to bad master cylinder, air in the lines, or foreign debris on the braking surfaces. (leaking wheel seal, a large amount of dust inside the drums, or a faulty master cylinder, letting fluid bypass to the front brakes.

Do you have excessive pedal travel?

Brake prop valves are hard to find for specific vehicles. Their valve spring rates are specific to a vehicles weight, brake system, options ect. Good luck finding one that works propperly.
 
62 rambler classic 2 door (casper)
63 rambler american 440 (rosie)
79 spirit (drag race car)
82 eagle station wagon (rotty wagon)
82 sx4 (honeybadger)

Offline captspillane

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Re: Multifunction brake valve
« Reply #5 on: April 19, 2015, 08:56:19 AM »
If your rear brakes lock up too early try backing off on the adjuster at the bottom. With that backed off enough your front brakes will do the majority of the stopping.

Keep in mind that there is a wire going to the Ebrake lever. That will put the brake light on if it is unplugged.

A common cause for your problem is putting the left-hand thread adjuster on the wrong side of the car. I forget off-hand but I think it was Drivers side was Left hand thread, and passenger side Right hand thread. I had them swapped on one Eagle I bought and it was a pain until I found the issue.
Currently Inspected and Insured as of Jan 2013:
-1985 Eagle Station Wagon 258 T5 Stickshift
-1980 Eagle Station Wagon 258 Auto Fuel-injected with GM TBI

Minor Repairs Underway:
-1982 Eagle SX4 258 T5
-1981 Kammback 2.5L Iron Duke T5

Restoration Efforts Near Completion:
-1982 SX4- 401 NV3550
-1983 SX4- 4.5 MPI NSG370 (6 Speed)

Restoration Efforts Underway:
-1985 SW- 4.0 MPI AX15
-1982 SX4- 4.0 AW4
-1981 SX4- SD33T NV4500 (Turbodiesel 5 speed)

Future Rescue Efforts- '85 Maroon SW, '87 Limited SW, '84 Limited SW, '87 4 door Sedan, '81 2 door Sedan, '88 White SW, '77 4 door Hornet, '74 2 door Hornet, '79 Spirit AMX, '81 Kammback.

RIP- Red '81 SX4, '84 4dr Sedan, '84 SW, '81 SW, '80 Spirit, '83 SW, '83 4dr Sedan

Offline mo.eagles

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Re: Multifunction brake valve
« Reply #6 on: April 19, 2015, 11:01:34 AM »
 I replaced both wheel cyls. on the rear and both front calipers. Replaced all the hardware on rear with new shoes and drums. New master cyl. and booster . All adjusted properly. Pedal travel is correct. Tried cleaning valve but it has a lot of corrosion , maybe moisture in the system a some point. I've checked the dash light system and it traces back to the valve sticking internally.
'85 wagon Limited   tilt wheel , cruise control
power seats ,windows and locks
rear window washer /wiper 
tach and gauge package
A/C
 '85 wagon   power windows and locks
rear window washer/wiper
factory tow package
A/C

Offline AMC1

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Re: Multifunction brake valve
« Reply #7 on: April 19, 2015, 12:22:01 PM »
I had that dash brake warning light come on after doing a brake job on my car. I figured it was that brake proportioning valve. I slammed my foot into the brake pedal as hard as I could a few times & it went off.
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Offline carnuck

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Re: Multifunction brake valve
« Reply #8 on: April 19, 2015, 05:41:43 PM »
The valve gets messed up from contaminated fluid over the years. Not many people replace their fluid unless they have to.
AMC/Jeep gauges are for amusement only. Any correlation between them and reality is purely coincidental!

 

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