The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - Brake Issues-Lock up-Burn up

68gmsee · 01-04-2009, 05:18 PM

Something else to be aware off...

Many years ago I had a similar issue. One rear brake would lock up and get the drum extremely hot. Checked everything and finally found out that the rubber brake hose on top of the axle was almost swelled shut on the inside.

The pressure from the booster/master cylinder forces the fluid through, but the spring retraction is not strong enough to allow the return of the fluid.

I checked it with the wheel raised up and truck chocked. Ran the engine slowly and stepped on the brake. I couldn't get it unlocked unless I released the pressure with the bleed valve.

I replaced all of them.

01-04-2009, 05:18 PM	#6
68gmsee Active Member Join Date: Jul 2007 Location: Centrally located between Houston, Austin and Waco. BCS area. Posts: 7,947	Re: Brake Issues-Lock up-Burn up Something else to be aware off... Many years ago I had a similar issue. One rear brake would lock up and get the drum extremely hot. Checked everything and finally found out that the rubber brake hose on top of the axle was almost swelled shut on the inside. The pressure from the booster/master cylinder forces the fluid through, but the spring retraction is not strong enough to allow the return of the fluid. I checked it with the wheel raised up and truck chocked. Ran the engine slowly and stepped on the brake. I couldn't get it unlocked unless I released the pressure with the bleed valve. I replaced all of them.