Brake problems
Thread Starter
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Mountain Pass
Joined: Feb 2013
Posts: 244
Likes: 0
From: Cadillac, Michigan
All I haven't changed on the front now is the brake hoses. Someone said they could be bad! I've never had that problem before but the truck did sit for 2-3 years before I got it. 25 bucks and I'll c. Thanks everyone. Once I figure it out I'll post.
Senior User
Joined: Jan 2015
Posts: 383
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From: Stockdale, Tejas
Before you do that, did you ever replace the caliper you couldn't get open? Also check the bleeder on the other caliper you had problems with if it is junked up and rusted on the inside it will probably have to be replaced as well. I just hate to see someone throw money at parts that are probably ok.
Thread Starter
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Mountain Pass
Joined: Feb 2013
Posts: 244
Likes: 0
From: Cadillac, Michigan
Before you do that, did you ever replace the caliper you couldn't get open? Also check the bleeder on the other caliper you had problems with if it is junked up and rusted on the inside it will probably have to be replaced as well. I just hate to see someone throw money at parts that are probably ok.
Thread Starter
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Mountain Pass
Joined: Feb 2013
Posts: 244
Likes: 0
From: Cadillac, Michigan
I was just checking out the brake lines from the master to the proportioning valve, it appears to have 1-2 new lines to it, could that have had new lines ran to it and never got bled right? Or how do you even bleed a proportioning valve? Or should it bled thru the calipers? Just another thought.
Thread Starter
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Mountain Pass
Joined: Feb 2013
Posts: 244
Likes: 0
From: Cadillac, Michigan
Ok I've done some more testing. I removed the caliper from the rotor, I put a c- clamp on the caliper loose enough so when I hit the brake we could tell if the caliper moved. No movement. On either caliper. We broke the bleeder and got fluid, but no pressure to push the caliper. I'm thinking I got a stuck proportioning valve. I've tried everything to re enter it but I'm not getting any pressure to the front. I believe it is the valve. Any ideas? Thanks for any help.
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Joined: Nov 2007
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From: Denver Metro Area, CO
Why do you think it is the valve?
Crack open a few turns one front-wheel connection from the valve, then go step on the pedal and see if fluid leaks out. Close it up and test the other front-wheel connection.
You can perform the same test at the mater cylinder connections.
The master cylinder would be a single item that could be responsible and I would suspect it more than I would the valve.
Crack open a few turns one front-wheel connection from the valve, then go step on the pedal and see if fluid leaks out. Close it up and test the other front-wheel connection.
You can perform the same test at the mater cylinder connections.
The master cylinder would be a single item that could be responsible and I would suspect it more than I would the valve.
Senior User
Joined: Jan 2015
Posts: 383
Likes: 0
From: Stockdale, Tejas
Ok I've done some more testing. I removed the caliper from the rotor, I put a c- clamp on the caliper loose enough so when I hit the brake we could tell if the caliper moved. No movement. On either caliper. We broke the bleeder and got fluid, but no pressure to push the caliper. I'm thinking I got a stuck proportioning valve. I've tried everything to re enter it but I'm not getting any pressure to the front. I believe it is the valve. Any ideas? Thanks for any help.
Thread Starter
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Mountain Pass
Joined: Feb 2013
Posts: 244
Likes: 0
From: Cadillac, Michigan
Yes when I bleed the calipers, the flow is good. I removed the master cylinder cap and bushed the brake slowly! The front part of the master cylinder spurted fluid up, nothing from the rear of the cylinder. So I'm not real sure of my problem. I have bled brakes for years, never have had this problem. I believe this is the first system with a proportioning valve. I'll get it or die trying lol
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From: Denver Metro Area, CO
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Joined: Nov 2006
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I know this might sound bad, but if someone did change the brake lines from the MC to the Proportioning Valve, is it possible that they flipped the lines? The front reservoir is for the rear brakes (Drum) and the rear resevoir is for the front (Disc). That will really screw things up. Dont ask how I know. Front to front, rear to rear, right???? It just will not work that way. It is bass ackwards, if you know what I meen. Thought it would be worth a look.
Thread Starter
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Mountain Pass
Joined: Feb 2013
Posts: 244
Likes: 0
From: Cadillac, Michigan
I know this might sound bad, but if someone did change the brake lines from the MC to the Proportioning Valve, is it possible that they flipped the lines? The front reservoir is for the rear brakes (Drum) and the rear resevoir is for the front (Disc). That will really screw things up. Dont ask how I know. Front to front, rear to rear, right???? It just will not work that way. It is bass ackwards, if you know what I meen. Thought it would be worth a look.