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Brake Pads

REMOVAL & INSTALLATION

Fig. 1: Front brake overall view

Fig. 2: Exploded view of a rotary pick-up's brake caliper and shoe (pad) assembly

Fig. 3: Exploded views of the B1800 and 1979–84 B2000 (top) and B2200 (bottom) brake caliper and shoe (pad) assemblies

Fig. 4: Exploded view of a 1986 model's disc brake assembly

Fig. 5: To aid in caliper removal for changing the brake pads, place a large C-clamp over the caliper as shown, and tighten the clamp slightly to release static pressure on the pads

Fig. 6: Remove the lower caliper mounting bolt and loosen the upper bolt . . .

Fig. 7: . . . then pivot the caliper slowly . . .

Fig. 8: . . . until it is clear of the brake pads (some models may require you to remove the upper bolt and then lift the caliper off the pads)

Fig. 9: Remove the inner brake pad . . .

Fig. 10: . . . and its anti-rattle clip . . .

Fig. 11: . . . followed by the outer brake pad . . .

Fig. 12: . . . and its anti-rattle clip

Fig. 13: Make sure the caliper piston is fully seated in the caliper before attempting to install the new pads — using an old brake pad with the large C-clamp will protect the caliper piston from damage

NOTE: Minimum thickness of the pad lining and backing plate combined should be 7mm (0.276 in.).

Through 1984
  1. Raise and support the front end on jackstands.
  2. Remove the wheels.
  3. Remove the caliper retaining pins and hold-down plates.
  4. Lift off the caliper, remove the anti-rattle clips and remove the pads.
  5. Remove about 1⁄2 of the fluid from the front brake reservoir of the master cylinder.
  6. Position a large C-clamp on the caliper and force the piston back into its bore.
  7. Installation is the reverse of removal. Shims are used behind the pads on these trucks from the factory. These shims should be discarded and replaced with new ones at each pad change. Some aftermarket pads are too thick to use these shims. In that case, don't try to force new shims in place. Do without them. Refill the master cylinder reservoir. Pump the brake pedal a few times to restore pressure.
1986 Vehicles
  1. Raise and support the front end on jackstands.
  2. Remove the wheels.
  3. Remove the caliper lockpin bolts.
  4. Lift off the caliper and remove the brake pads.
  5. Remove about 1⁄2 of the fluid from the front brake reservoir of the master cylinder.
  6. Position a large C-clamp on the caliper and force the piston back into its bore.
  7. Install new pads in the caliper. Shims are used behind the pads on these trucks from the factory. These shims should be discarded and replaced with new ones at each pad change. Some aftermarket pads are too thick to use these shims. In that case, don't try to force new shims in place. Do without them.
  8. Position the caliper on the mounting support, install the lockpins and tighten them to 30 ft. lbs.
  9. Install the wheels, lower the truck to the ground and refill the master cylinder. Pump the brake pedal a few times to restore pressure.

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