belvedere666 Posted May 4, 2017 Report Share Posted May 4, 2017 Replaced all my wheel cylinders, brake shoes, brake lines , brake hoses. on my rear passenger side, the left side of the wheel cylinder keeps popping off when the brake pedal is pressed. all the wheel cylinders are new and this is the only one that is having the problem. I switched it out with the one that was on the car before I replaced it and the same thing happened. Any advice on what the problem could be? the picture is of the older one with "Lockheed" stamped on it. The other one was a no name one from Bernbaum. Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted May 4, 2017 Report Share Posted May 4, 2017 are you using the correct pin length? Seems you are displacing the piston to far for shoe to drum contact.....wrong pin...way out of adjustment 1 Quote Link to comment Share on other sites More sharing options...
belvedere666 Posted May 4, 2017 Author Report Share Posted May 4, 2017 (edited) 28 minutes ago, Plymouthy Adams said: are you using the correct pin length? Seems you are displacing the piston to far for shoe to drum contact.....wrong pin...way out of adjustment I have the same size pins all around. They are all from Bernbaum. They said there is only one size. i don't have one of those fancy AMMCO break adjusting tools. Edited May 4, 2017 by belvedere666 Hit send too soon Quote Link to comment Share on other sites More sharing options...
Reg Evans Posted May 5, 2017 Report Share Posted May 5, 2017 I vote way out of adjustment then. 1 Quote Link to comment Share on other sites More sharing options...
belvedere666 Posted May 5, 2017 Author Report Share Posted May 5, 2017 19 minutes ago, Reg Evans said: I vote way out of adjustment then. So should this be able to be fixed with a few turns of the adjusting bolt until it stops where it should? Quote Link to comment Share on other sites More sharing options...
Gary Roberts Posted May 5, 2017 Report Share Posted May 5, 2017 1 hour ago, Plymouthy Adams said: are you using the correct pin length? Seems you are displacing the piston to far for shoe to drum contact.....wrong pin...way out of adjustment I think you are on to something, rear pins should be larger than the ones used on the front cylinder, often the front ones are copper colored and the rear are silver Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted May 5, 2017 Report Share Posted May 5, 2017 Mixing and matching long and short wheel cylinder push rods with std or oversize drums can get you in trouble. Some pistons have a deeper hole than others... mix this with turned drums that are near the .060" limit and the typical replacement short push rods and wah-la...trouble! 1 Quote Link to comment Share on other sites More sharing options...
belvedere666 Posted May 5, 2017 Author Report Share Posted May 5, 2017 51 minutes ago, Dodgeb4ya said: Mixing and matching long and short wheel cylinder push rods with std or oversize drums can get you in trouble. Some pistons have a deeper hole than others... mix this with turned drums that are near the .060" limit and the typical replacement short push rods and wah-la...trouble! All my Cylinders and pistons came from Bernbaum and have the factory length pins. the ones that I switched out have the red/pink pistons and the same thing is happening. I don't know about the drums but all the other cylinders stay together when The pedal is pushed down with the drum off. Quote Link to comment Share on other sites More sharing options...
Reg Evans Posted May 5, 2017 Report Share Posted May 5, 2017 1 hour ago, belvedere666 said: So should this be able to be fixed with a few turns of the adjusting bolt until it stops where it should? With a hefty but refundable deposit I will loan you my Aamco 1750 so you can get the shoes adjusted just right. PM me if interested. Reg 1 Quote Link to comment Share on other sites More sharing options...
Dodgeb4ya Posted May 5, 2017 Report Share Posted May 5, 2017 Please don't push the pedal down with the drum off...... 1 Quote Link to comment Share on other sites More sharing options...
belvedere666 Posted May 5, 2017 Author Report Share Posted May 5, 2017 4 minutes ago, Dodgeb4ya said: Please don't push the pedal down with the drum off...... Rookie mistake! i felt like I needed to actually SEE what was happening when the pedal was pushed. I saw brake fluid dripping down through the wheels. what problems might this cause? Quote Link to comment Share on other sites More sharing options...
Jerry Roberts Posted May 5, 2017 Report Share Posted May 5, 2017 25 minutes ago, belvedere666 said: Rookie mistake! i felt like I needed to actually SEE what was happening when the pedal was pushed. I saw brake fluid dripping down through the wheels. what problems might this cause? Parts squirting out of the wheel cylinder , as shown in your photo , and air in the system . Quote Link to comment Share on other sites More sharing options...
Plymouthy Adams Posted May 5, 2017 Report Share Posted May 5, 2017 Quote Link to comment Share on other sites More sharing options...
belvedere666 Posted May 5, 2017 Author Report Share Posted May 5, 2017 11 minutes ago, Jerry Roberts said: Parts squirting out of the wheel cylinder , as shown in your photo , and air in the system . I figured it would let air in the system. After discovering the rubber cup falling off I knew I would have to bleed the system all over again. I also discovered that there A LOT of fluid in the cylinders. It holds A LOT more than it looks. Quote Link to comment Share on other sites More sharing options...
ptwothree Posted May 5, 2017 Report Share Posted May 5, 2017 Btw..If anyone has there heart set on Chinese wheel cylinders, rockauto has em for about $10 right now. Quote Link to comment Share on other sites More sharing options...
1952B3b23 Posted May 5, 2017 Report Share Posted May 5, 2017 9 hours ago, belvedere666 said: Rookie mistake! i felt like I needed to actually SEE what was happening when the pedal was pushed. I saw brake fluid dripping down through the wheels. what problems might this cause? Dont feel too bad. I've done this before as well. I had a friend pumping the brake pedal while i bled the front brakes (with the drums off). Next thing i know i hear a funny sound and see a ton of brake fluid pouring out of my drivers side front wheel cylinder. Duh, the wheel cylinder basically over extended because the shoe had no drum to contact. The fix was easy, put the drum back on and start the bleeding procedure over. I did feel like an idiot though lol. -Chris 1 Quote Link to comment Share on other sites More sharing options...
dale Posted May 5, 2017 Report Share Posted May 5, 2017 Better check the shoes for brake fluid and if they did get it on them throw them away and get new ones. I suggest checking the pin lengths with a micrometer. Quote Link to comment Share on other sites More sharing options...
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