PBR Master Cylinder
Thread Starter
Intermediate
Joined: Apr 2025
Posts: 25
Likes: 4
From: East Tennessee
PBR Master Cylinder
Has anyone found a rebuild/repair kit for a stock PBR Master Cylinder. My off brand master cylinder brings in the brake light from the proportioning valve. I've bench bled the MC and bled the brakes. Nearly ran a gallon of fluid though. Very frustrated and ready to just disconnect the switch!!!
Burning Brakes
Joined: Jan 2015
Posts: 874
Likes: 76
Has anyone found a rebuild/repair kit for a stock PBR Master Cylinder. My off brand master cylinder brings in the brake light from the proportioning valve. I've bench bled the MC and bled the brakes. Nearly ran a gallon of fluid though. Very frustrated and ready to just disconnect the switch!!!
I did rebuild my front calipers a while back when I replaced the brake hoses. But they don't sell a full rebuild kit for the rear calipers, only a partial kit. So I ended up deciding to replace the rear calipers while I was replacing the brake hoses since the calipers were original. I would have rebuilt the rears if they still sold proper rebuild kits as they are a good candidate for a rebuild as they are original and don't leak.
Pro
Joined: May 2025
Posts: 589
Likes: 137
From: OK
That switch is sort of a pos, play with it till you figure out how it works and then look in the master cylinder and see if it's actually being triggered or not. If your brakes work the odds are higher it's the switch than the master.
If the brakes don't work that's another story.
I was able to take mine apart and clean it up. Pretty fragile though.
If the brakes don't work that's another story.
I was able to take mine apart and clean it up. Pretty fragile though.
Instructor
Joined: Apr 2017
Posts: 156
Likes: 36
From: Cleveland Ohio
If the brake light is going on, then that means there's a problem in the brake system. Assuming you don't have leaks, probably a bad master cylinder. So, disconnecting the switch will just leave the problem in place. Since this is brakes, I'd replace the master cylinder to be safe. I don't think they make rebuild kits anymore. Might as well get a new master cylinder that has a lifetime warranty.
I did rebuild my front calipers a while back when I replaced the brake hoses. But they don't sell a full rebuild kit for the rear calipers, only a partial kit. So I ended up deciding to replace the rear calipers while I was replacing the brake hoses since the calipers were original. I would have rebuilt the rears if they still sold proper rebuild kits as they are a good candidate for a rebuild as they are original and don't leak.
I did rebuild my front calipers a while back when I replaced the brake hoses. But they don't sell a full rebuild kit for the rear calipers, only a partial kit. So I ended up deciding to replace the rear calipers while I was replacing the brake hoses since the calipers were original. I would have rebuilt the rears if they still sold proper rebuild kits as they are a good candidate for a rebuild as they are original and don't leak.
Not trying to hijack the thread but what about the rear caliper kits is not enough to do a rebuild? I was planning to use a rebuild kit on my 96 rears this winter just as preventative maintenance. Rock Auto carries them super cheap.
Burning Brakes
Joined: Jan 2015
Posts: 874
Likes: 76
They don't come with all new metal pieces.
