20. Position air chamber on air chamber bracket (Fig.
22. Install brake shoe return spring (Fig. 177). Before in-
175). Secure with nuts and lockwashers. Tighten nuts
stalling spring, make sure that slack adjusters ore ad-
to specified torque. Secure clevis of brake chamber
justed to allow brake shoes to come together as
to slack adjuster with pin and cotter pin.
closely as possible so that spring tension will be at o
minimum during installation. Install spring anchor pin
washers and cotter pins.
CAUTION: Do not use pliers with serrated jaws to as-
semble brake spring. Do not use any tool which will
nick or score spring. This will cause ear/y failure. Tool
shown is brake pliers which has provisions on end of
hand/e for installing spring.
21. Position brake shoe on spindle support. Retain brake
shoe by inserting brake shoe anchor pin (Fig. 176).
23. Lock brake shoe anchor pins with anchor pin set
Install second broke shoe in same manner.
screws. Lockwire set screws (Fig. 178).
NOTE: On some axles, brake anchor pins are held
in place with retaining plate, bolt, and lockwasher.
Tighten bolt to specified torque.
