This can prevent the wheel cylinder pistons from retracting. (Keep dirt and debris away from the bleeders.) Make sure that the master cylinder reservoir is not too full. Sometimes, if the brake shoes were badly worn, you may need to crack open the bleeder valves to relieve fluid pressure and allow the pistons to retract. Earlier practice in my era was to match (cam arc grind) new shoe linings to fit freshly turned drums.Īfter backing off the parking brake adjustment, retracting the adjusters and tapping the shoes toward each other with the heels of your palms should seat the shoes- unless the wheel cylinder pistons are frozen and will not retract properly. Of course this is less accurate, and it takes a while for new lining to seat (contour) against the drum surface. (Brake specialty shops and suppliers still do this.) Out of the box, most shoes are arc'd for a standard diameter to 0.060" oversized ("turned") drum. Cam arc'ing shoe linings to match drum size is no longer a common practice. There are unusual conditions where the shoe lining is too thick, but that's unlikely with mass production shoes. The shoe spread/width must be narrower than the inside diameter of the drum-as you already know. Compare this to the drum's inside diameter. Install the new shoes and measure the spread/diameter at the centerline of the shoes (maximum width of linings). If the shoe back (metal) is a radius match for each new shoe, then the thickness difference would be the new lining versus the old lining.Ĭonsider whether the parking brake is adjusted too tightly for the new shoes. When you share that the original shoes were "smaller", are you laying one shoe on top of the other? That's the best way to compare the diameter/radius of the shoes. This is the same sizing as the Duralast dimensions from AutoZone.ĭid you back off the parking brake cable adjustment to allow the plate to retract the brake shoes completely? The vehicle's parking brake might have been spooled up to compensate for the worn brake lining. TRW shows the drum size as 8-21/32" diameter with a 1-45/64" shoe width. I dug deeper on this "738" and compared the Duralast sizing to TRW's ZD738 shoes. You can check the spread of the shoe linings and I.D. The footnotes for this rear brake shoe set show the drum inside diameter and shoe width as 8.66" x 1.63" (approximately 220mm x 41.4 mm). The part number shows up under AutoZone's Duralast line for both the 2WD and 4WD 2000 model year Tracker 2.0L. of the drum (at the narrowest point) to the widest point of the seated brake shoes spread: You can see that this can quickly compare the I.D. I use a gauge for this that is a rough and quick estimate for setting up new brakes. Ross.You did retract the self-adjuster mechanisms and seat the brake shoes before attempting to slide on the drums? If so, and if the drums still do not fit onto the shoes, carefully measure the inside diameter of the drum and the outside spread/width of the shoes at their widest point. It was easy to access in any event, however - two screws and two body pins, and the cover sort of slides & twists off the lever, exposing what you see in the pic. My Tracker had a simple cover over it when I got it, but I later ordered a different cover that includes cup holders, so your Tracker might be different again. You just have to remove whatever is covering your e-brake lever. I haven't gone any further to diag why my cable is frozen yet, but it's not a big deal (to me) at the moment. The upper cable in the photo leads to the rear drivers wheel, and barely engages when the lever is pulled, but the lower cable in the pic (rear pass) engages fine and locks it up VERY tight. You can see here that the cables are uneven - hopefully yours are even. Life got in the way last week, however - while finishing up my interior refurb project yesterday, also completed replacing the rear brake shoes, both wheel cylinders, and all rear brake hardware, including flushing all brake fluid from the three bleed valves (the rear passenger wheel is the only one without a bleed valve - you bleed that circuit from the rear drivers wheel).īack to the OP's question, the emergency brake adjust is a single 10 mm bolt adjuster right behind the rear e-brake lever:
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