REMOVAL & INSTALLATION
See Figures 1 through 13
Fig. Fig. 1: Detach the brake cable from the actuating lever
Fig. Fig. 2: Straighten the cotter pin ends ...
Fig. Fig. 3: ... then remove the cotter pin from the castellated retaining nut
Fig. Fig. 4: Use a large ratchet wrench and socket to loosen the retaining nut ...
Fig. Fig. 5: ... then remove the retaining nut
Fig. Fig. 6: Use a small prytool to work the driveshaft flange loose ...
Fig. Fig. 7: ... then remove the driveshaft flange and seal from the drum
Fig. Fig. 8: Slide the transmission brake drum off of the brake shoes
Fig. Fig. 9: Once the drum is removed, access to the brake shoes is possible
Fig. Fig. 10: Disconnect the return spring, then remove the lower shoe and spring together ...
Fig. Fig. 11: ... and remove the upper transmission brake shoe
Fig. Fig. 12: The brake cable pulls on the actuating cam lever to apply braking force
Fig. Fig. 13: Pull the cable spring back and disconnect the cable from the rod
Brake linings may contain asbestos. Asbestos is a known cancer-causing agent. When working on brakes, remember that the dust which accumulates on the brake parts and/or in the drum contains asbestos. Always wear a protective face covering, such as a painter's mask, when working on the brakes. NEVER blow the dust from the brakes or drum! There are solvents made for the purpose of cleaning brake parts. Use them!
Clean, high quality brake fluid is essential to the safe and proper operation of the brake system. You should always buy the highest quality brake fluid that is available. If the brake fluid becomes contaminated, drain and flush the system, then refill the master cylinder with new fluid. Never reuse any brake fluid. Any brake fluid that is removed from the system should be discarded.
Remove the driveshaft.
Remove the retracting spring clevis pin and the spring clip.
Remove the hub locknut, the nut and washer from the transfer case output shaft.
Using a puller, remove the brake drum and companion flange.
Remove the retracting springs and shoes from the backing plate.
Clean all parts with a safe solvent.
Installation is the reverse of the removal procedure. Replace any weak springs and clean the adjuster threads. Coat the threads with a LIGHT film of oil. It will be necessary to back off the adjusting screw wheels to allow drum installation.
Adjust the brake, as described later in this section.
Make sure that the brake handle on the instrument panel is fully released. Check the operating linkage and the cable to make sure that they do not bind. If necessary, free the cable and lubricate it. Rotate the brake drum, located on the back end of the transmission assembly, until one pair of the three sets of holes are over the shoe adjusting screw wheels in the brake drum. Use the edge of the holes in the brake drum as a fulcrum for the brake adjusting tool or a prytool. Rotate each notched adjusting screw by moving the handle of the tool away from the center of the driveshaft until the shoes are snug against the drum. Back off seven notches on the adjusting screw wheels to secure the proper running clearance between the shoes and the drum.