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After you remove the tire, the drim should slide off. If it doesn't then try using a rubber mallet and gently tap on the outside edge as you pull on it. Sometimes you also need to tap on the drum in the center part. I have sprayed penetrating lubes like WD-40 or PB Blaster into the seam at the center. You may also have to back off the parking brake cable or even use the adjuster to back off the shoes.
REMOVAL & INSTALLATION It is a good idea to only disassemble and assemble one side at a time, leaving the other side intact as a reference.
Raise and support the vehicle safely.
Remove the brake drum.
Disconnect the parking brake rear cable and conduit.
Remove the brake shoe hold-down springs and brake shoe hold-down pins.
Remove the brake shoe adjusting screw spring.
Remove the brake shoe adjusting lever and adjuster screw.
Remove the brake shoe retracting spring.
Remove the brake shoes from the backing plate.
Remove and discard the parking brake lever clip. Remove the washer.
Remove the parking brake lever from the rear brake shoe.
Thoroughly clean the backing plate with brake cleaning solvent and dry completely.
Use silicone grease to lubricate the brake backing plate-to-brake shoe contact areas.
Apply a light coating of premium grease to the threaded areas of the adjuster. Turn the adjuster in and out to spread the lubricant. Turn the adjuster all the way down on the screw and loosen one-half turn.
Install the parking brake lever to the rear (secondary) brake shoe with a new clip.
Position the brake shoes on the backing plate and install the brake shoe hold-down springs.
Attach the parking brake rear cable and conduit to the parking brake lever.
Attach the brake shoe retracting spring.
The socket end of the brake adjuster screw is stamped with "R" or "L" to indicate that it is to be installed either on the right (passenger's side) or left (driver's side) of the vehicle. The adjuster nuts can be distinguished by the number of grooves machined around the body of the nut. Two grooves indicate a right-hand adjuster nut and one groove indicates a left-hand adjuster nut. Another way to identify brake adjuster assemblies is to check thread pitch. The right side adjuster assembly has right-hand threads and the left side has left-hand threads. If installed correctly, the brake adjuster assembly will increase in length when the brake shoe adjusting lever is operated.
Install brake adjuster screw in the slots on the brake shoes. The wider slot on the socket end must fit in the slot on the front (primary) brake shoe.
Install the brake shoe adjusting lever on the lever pin.
Install the brake adjusting screw in the slot on the secondary brake shoe and in the slot on the brake shoe lever. The brake shoe adjusting lever should contact the brake adjuster screw.
Adjust the brake shoes.
Install the drums.
The drum brakes are self-adjusting and require a manual adjustment only after the brake shoes have been replaced, or when the length of the adjusting screw has been changed while performing some other service operation. Drum Installed
Raise and support the vehicle safely.
Remove the rubber plug from the adjusting slot on the backing plate.
Insert a Brake Adjustment Tool (D81L-1103-C) or equivalent into the slot and engage the lowest possible tooth on the starwheel. Move the end of the brake spoon downward to move the starwheel upward and expand the adjusting screw. Repeat this operation until the brakes lock the wheels.
Insert a small screwdriver or piece of firm wire (coat hanger wire) into the adjusting slot and push the automatic adjusting lever out and free of the starwheel on the adjusting screw and hold it there.
Engage the topmost tooth possible on the starwheel with the brake adjusting spoon. Move the end of the adjusting spoon upward to move the adjusting screw starwheel downward and contract the adjusting screw. Back off the adjusting screw starwheel until the wheel spins freely with a minimum of drag. Keep track of the number of turns that the starwheel is backed off, or the number of strokes taken with the brake adjusting spoon.
Repeat this operation for the other side. When backing off the brakes on the other side, the starwheel adjuster must be backed off the same number of turns to prevent side-to-side brake pull.
When the brakes are adjusted, make several stops while backing the vehicle to equalize the brakes on both of the wheels.
Lower the vehicle.
See Figure 2
Fig. Fig. 2: When using a brake adjustment gauge, first measure the inside diameter of the drum (top) and then adjust the brakes shoes to the proper outside diameter (bottom)
Remove the brake drum.
Make sure that the shoe-to-contact pad areas are clean and properly lubricated.
Using a Brake Adjustment Gauge (D81L-1103-A) or equivalent, check the inside diameter of the drum.
Measure across the diameter of the assembled brake shoes, at their widest point.
Turn the adjusting screw so that the diameter of the shoes is 0.030 in. (0.76mm) less than the brake drum inner diameter.
Install the drum.
See Figure 3
Fig. Fig. 3: Measure brake shoe thickness in several places around the shoe
Inspect the brake shoes for wear using a ruler or Vernier caliper. Compare measurements to the brake specifications chart. If the lining is thinner than specification or there is evidence of the lining being contaminated by brake fluid or oil, replace all brake pad assemblies (a complete axle set).
Remove the dust cap from the rear hub and bearing assembly.
Remove the cotter pin, nut retainer and wave washer. Discard the old cotter pin.
Remove the rear hub and bearing assembly retainer nut and washer. Remove the rear hub and bearing assembly from the spindle.
Remove the automatic adjuster spring from the adjuster lever.
Rotate the automatic adjuster starwheel enough so both shoes move out far enough to be free of the wheel cylinder boots.
Disconnect the parking brake cable from the actuating lever. Disconnect parking brake cable one side at a time.
Remove the both lower brake shoe to anchor springs.
Remove the 2 brake shoe hold-down springs from the brake shoes.
Remove the brake shoes, upper shoe-to-shoe return spring, automatic adjuster and automatic adjuster lever from the backing plate as an assembly.
Separate the brake shoes from the automatic adjuster mechanism.
Remove the brake shoe automatic adjuster lever from the leading brake shoe.
Thoroughly clean and dry the backing plate. To prepare the backing plate, lubricate the bosses, anchor pin and parking brake actuating lever pivot surface lightly with lithium based grease.
Remove, clean and dry all parts still on the old shoes. Lubricate the starwheel shaft threads with anti-seize lubricant.
Assemble both brake shoes, the top shoe to shoe return spring, automatic adjuster and automatic adjuster lever before mounting on vehicle. Make sure the ends of the automatic adjusters are positioned above the extruded pins in the webbing of the brake shoes prior to installation.
Install the brake shoe assembly onto the brake support plate and install the hold-down springs.
Install the lower anchor springs and reconnect the parking brake cable to the park brake lever of the trailing brake shoe.
Rotate the serrated adjuster nut to remove the free-play from the adjuster assembly.
Install the automatic adjuster lever spring on the lead brake shoe assembly and the automatic adjuster lever.
Install the rear hub and bearing assembly. Install washer and retainer nut and torque to 124 ft. lbs. (168 Nm).
Install the wave washer, nut retainer and a new cotter pin onto the spindle. Install dust cap.
Adjust brake shoes so not to interfere with brake drum installation. Install the rear brake drum.
NOTE: After installing the brake drums, pump the brake pedal several times to partially adjust the brake shoes. To verify proper operation of the self-adjusting parking brake, be sure that both rear brakes are not dragging when the parking brake pedal is released.
Install the rear wheels and lug nuts. Torque the lug nuts, in a star pattern sequence, to 95 ft. lbs. (129 Nm).
Road test the vehicle. The automatic adjusters will continue brake adjustment during the road test of the vehicle.
there should be a little rubber cap on the front face of the rotor hat. remove it. rotate rotor so that the hole is at the bottom. look inside with a flashlight for the star wheel adjuster. stick a flathead screwdriver inside and turn the wheel (it might be difficult) to loosen off the shoes. you may need to play with it for a bit to figure out the right direction to turn it.
you will need to replace the wheel cylinders. always replace both sides and the shoes will need to be replaced also on both sides due to brake fluid contamination. make sure you have the drums resurfaced also!! hope this helps you!
i think your aware of how to change the brakes if im right and your problem is the rusted drum doesnt want to come off the only way to get the old drum off is to remove adjuster plug from behind drum dustshield and adjust the shoes so that there not even close to the braking area of the drum then try and wiggle the drum off of the assembly if it is not coming off then you need to use the old nylon hammer on the drum and i mean you must hit the drum from side to side trying by hand to wiggle the drum off its a tight fit and you need to strike the drum on the face not on the fins not wanting to damage with persistance and care and patience you will eventually be able to remove the drum to service brakes take care and good luck with it