Chevrolet 30 Series 1967 Service Manual page 273

long each side, until wrench tight, at the same
time rotating hub to make sure all surfaces are
in proper contact. Then loosen nut at least 45
degrees, or more if necessary, until a lip of the
nut lock will engage the nearest flat on the nut.
b. Make sure wheel turns freely, then install nut
lock and locking nut. Tighten locking nut firmly.
Bend lip of nut lock over flat of locking nut.
c. Apply a rope of smooth cup grease around outer
bearing.
5. Install axle shaft and secure with "sp lit wedge"
locks and retaining nuts.
. Install inner rim and tire assembly (make certain
6
valve points toward the outside), rim spacer and
outer rim and tire assembly making certain tire
valve is 180° away from inner tire valve.
7. Install rim locks and nuts. Tighten nuts alternately
on opposite sides, to torque specified in Section 3
under Wheels and T ires.
NOTE: Nuts and rim locks must be torqued at
the end of 500 miles to be certain they have not
loosened.
AIR BRAKE
Adjustment
The brake shoe-to-drum freeplay adjustment of air
brakes is accomplished by means of the slack adjuster
which is incorporated in the camshaft lever.
Fig . 93—Front Wheel Brake Layout (Except Mounting)
With brakes released, the angle formed by the push
rod and camshaft lever must be greater than 90°, and
all units should be set at the same angle. With the brakes
applied, after being adjusted, this angle should still be
greater than 90°. In other words, the camshaft lever
should not go "over center" when the brakes are applied.
The position of the push rod yoke on the push rod should
be adjusted if necessary until these conditions prevail.
Proper shoe-to-drum free play may be obtained by per­
forming the following procedures:
F r o n t a n d R e a r
1. Using the proper size "b o x " wrench or deep socket
wrench, depress the spring loaded collar that locks
the slack adjuster adjusting nut in place (fig. 94).
2. Turn the adjusting nut until a uniform light drag is
felt on the wheels.
3. Back off on nut until wheel is just free; then back off
three more " fla ts "
clearance. Repeat
adjusters.
RESERVOIRS
Removal
1. Bleed all air out of brake system.
2. Disconnect air lines and remove drain cock.
3. Remove mounting bracket nuts and bolts and remove
reservoir.
BRAKES 5-59
for facing-to-drum running
this operation at all
CHEVROLET TRUCK SERVICE M ANUAL
slack