Section 5 - Brakes

Satisfactory performance can be obtained by re­placing only the forward shoes when the reverse shoe linings do not show excessive wear. Tests have shown that in most cases the reverse lining will outlast two sets of forward linings. This is true of both front and rear wheel brakes.
Shoes should be changed in sets; that is, both forward shoes on the front wheels, or both forward and reverse shoes on front wheels. The same is true on the rear wheels.
2.    Install wheel cylinder clamp. Fig. 16 (J-718C) to keep the wheel cylinder pistons in place and prevent leakage of brake fluid while replacing shoes.
3.   Remove brake shoe retracting spring with spe­cial pliers, Fig. 17.
4.   Remove conical guide springs, Fig. 1.
5.   Remove brake shoe anchor pin lock and pin. On rear brakes—remove toggle lever, eccentric bolt and nut from the rear brake shoe.
6.   Disassemble articulating links from shoes by removing friction spring pin locks, pins and springs.
1-1/2-Ton and C.O.E. Trucks
The removal and replacement of the brake shoes of the l-1/2-ton and C.O.E, trucks is identical with that of the passenger cars except for three slight variations in the design of the hook-up.
1.    It is necessary to remove the wheels and brake drums with the wheel hubs to replace brake linings, necessitating the readjustment of the
wheel bearings.
2.   The toggle mechanism of the passenger car emergency brakes at the rear wheels is re­placed on the trucks by a lever and link assem­bly. This lever and link assembly is attached to the rear brake cable on the outside of the brake flange plate. The lever on the inside, as it is actuated by the emergency brake lever to set the brakes, moves the links outward ex­panding the brake shoes. Each link has a sup­port at its outer end.
3.   Each brake shoe of the rear brakes has an in­dividual anchor pin.
1.   Remove the rivets, using the deliner punches in a brake shoe relining machine.
2.   Wash the shoes in gasoline or other cleaning fluid, then buff them on a wire buffer.
3.    Install new lining in place on shoe and rivet two holes at center.
4.   In order to eliminate air pockets between lin­ing and shoe which might cause uneven con­tact or squeaky brakes, a brake shoe lining clamp should be used to force the lining against the shoe. Fig. 18.
5.   After the end holes in the lining and shoe are in alignment, the rivets may be installed in both ends, Fig. 19.
Passenger, 1/2 and All 3/4-Ton Trucks
1. Jack up the car, place on car horse or stand jack, and remove wheel and brake drum.
Fig. 16—Installing Brake Wheel Cylinder Clamp
Fig- 17—Removing Brake Shoe Retracting Spring





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