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Oil Can Mechanic
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I'm frustrated: My front left brake has started to grab against the drum. I REPLACED THE WHEEL CYLINDER WITH A NEW CLY, SPRAYED BRAKE CLEANER ON THE SHOES BUT THIS WHEEL STLL LOCKS UP WHEN I APPLY THE BRAKES. I've BLED THE SYSTEM TWICE SO NO AIR IN LINE. WHAT COULD BE THE REASON?
ron
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Is there a brake spring that is involved.?..Didn't see year of Chevy.My 54 did the same...Bill
Old cars have always owned me.
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Sand the lining and drum surface with medium/fine sand paper.
If there was ever brake fluid or grease on the linings they will need to be replaced.
Last edited by Chev Nut; 11/25/16 03:17 PM.
Gene Schneider
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Oil Can Mechanic
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Can the shoes be cleaned up? Brake cleaner, heat?
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Backyard Mechanic
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Backyard Mechanic
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Check the other side. It may be frozen and not braking properly making it appear that the left is grabbing/pulling. I had that happen years ago.
Mike
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Check the brake hose. It could be locking up the brake owing to a deteriation blab in the inside of the line acting as a one-way valve. If replacing the hose cures the problem, go ahead and change all three. Same about the linings. If one has been penetrated by oil or brake fluid, it is best to change that one or however many were contaminated. Good luck, Charlie 
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Oil Can Mechanic
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Yes, I've had that happen. I replaced the hose, didn't make any difference. Tomorrow I'll try sanding the shoe and drum, see if that does anything. Do gremlins hide in the brake system?
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The brake linings can not be cleaned-up. Stuff will keep ozing out of the material.
Gene Schneider
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I'd replace the shoes but seems like '49 1 ton shoes aren't available anywhere. Carter relines them but I use the truck every day and don't have time to be down.
ron
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Maybe you can buy a used set of brake shoes from Brian's Salvage and have those shoes relined. Then, you put them on your truck with little down time.
Cheers, Dean
Dean 'Rustoholic' Meltz old and ugly is beautiful!
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Earlier I posted about the linings being contaminated. I meant to say shoes.  To help eliminate confusion we need to get the terminology correct. I'll take a stab at it. Here goes: a. Wheel cylinders push the SHOES against the drums b. BRAKE LINES deliver the brake fluid from the master cylinder to the hoses c. BRAKE HOSES deliver the brake fluid on to the wheel cylinders d. BRAKE SHOES are sometimes refered to as BRAKE LININGS The above is not intended for disc brakes, including calipers or pads. Anyone who has better information, let him/her speak. I suppose lines and hoses perform the same function in either application.  Best, Charlie
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Oil Can Mechanic
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Oil Can Mechanic
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what kind of brake fluid is in the system ?
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Oil Can Mechanic
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I sanded the shoes as you suggested. The linings look dry and now the wheel doesn't lock up. Don't now if this will solve the problem, will have to drive for a few days, I'll report back. Could be that just a thin contamination on the lining soften when the brakes are applied and tends to glue them to the drum. Holding the brakes down wont burn this film off.
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I sanded the glaze off the shoes and sprayed them with brake cleaner as you suggested. Been driving now several days and no more brake grab, so that seemed to do the trick. I'll remember this in the future. Thanks.
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