BRAKES LOCK SOLID!!!
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Lead Driver
Joined: Mar 2008
Posts: 7,193
Likes: 385
From: Near Los Angeles
BRAKES LOCK SOLID!!!
I was finishing a long brake upgrade, rear discs, new lines, hydroboost with a 4Xdisc master. It was getting late and I was dying to drive the truck that day, and not wait. All the fluids and tools and parts were on a table. When I went to bench the master, I grabbed p/s fluid by mistake and bleed with that. I didn't realize it for about an hour, and had not pumped the pedal. When I realized what I had done, I drained the reservoirs and fill with b.fluid, then pumped it through at the exit fittings.
I ordered a new master just in case, but had to wait two days for it to come in. Well, today I got the new one and went to bench bleed it. But I couldn't get the front line to pump fluid. I pumped over 300 times, but nothing!
So I go to take it back and get a refund. Before I left I checked the reservoir, and the rubber lid seal is all bloated. I'm thinking holy crap, I better get a new master in soon. On the way to the parts house I go to accelerate, and I can't! I was barely able to get in a driveway and out of traffic. The brakes were completely locked up. I had to rev it just to get up the drive, fighting against the brakes!
I thought it over a bit and decided to try to relieve the pressure at the master lines. I did that with a pair of pliers. The front line had nothing! It was completely swollen shut. Then I thought about a tow truck, because I had to bleed the lines, but just for the heck of it I tightened up the lines and tried to drive it. The pedal was high and hard, and it stopped great with only the rears working!!!
Tomorrow I'll vacuum out the entire system and change the master for sure.
I ordered a new master just in case, but had to wait two days for it to come in. Well, today I got the new one and went to bench bleed it. But I couldn't get the front line to pump fluid. I pumped over 300 times, but nothing!
So I go to take it back and get a refund. Before I left I checked the reservoir, and the rubber lid seal is all bloated. I'm thinking holy crap, I better get a new master in soon. On the way to the parts house I go to accelerate, and I can't! I was barely able to get in a driveway and out of traffic. The brakes were completely locked up. I had to rev it just to get up the drive, fighting against the brakes!
I thought it over a bit and decided to try to relieve the pressure at the master lines. I did that with a pair of pliers. The front line had nothing! It was completely swollen shut. Then I thought about a tow truck, because I had to bleed the lines, but just for the heck of it I tightened up the lines and tried to drive it. The pedal was high and hard, and it stopped great with only the rears working!!!
Tomorrow I'll vacuum out the entire system and change the master for sure.
