bracket bushing, spider bushing, retainer springs,
for wear. The procedure for relining follows:
yoke, yoke pin, cam spacer washer, and cam retainer
8-15. DISASSEMBLY (see figure 8-2).
w a s h e r . Replace defective parts. If brakes need
relining, see "relining brakes." Always replace the
a. Back off the slack adjuster.
spider bushing grease seals when the camshaft is
removed.
b. Remove the cast wheel or hub and drum (see
Section ll).
8-12.
CAMSHAFT
INSTALLATION.
a. Press in spider bushing. Line up the grease
c. Remove the brake shoe retainer springs.
h o l e in the bushing with the grease hole in the
d.
Remove the anchor
pin
lock
wash-
spider.
er
from anchor pin.
b. Press new seals in place on both sides of the
spider bushing. The lips of the seals must face the
bushing.
c . C o a t t h e s p i d e r bushing and the camshaft
bracket bushing with multi-purpose grease.
d. Put a very light coating of grease on the cam
spacer washer and place it under the camshaft head.
h. Remove the shoe and lining assembly.
e . Start assembling the camshaft through the
spider while being careful not to damage the bushing
and seals.
j. Remove the snap ring retaining the cam
f. Place the cam retainer washer and one snap
ring over the cam spline and then push the camshaft
rolIer
shaft,
through the camshaft bracket.
k. Remove the cam roller and shaft.
g. Put the slack adjuster in position on the cam-
l. Remove the lining rivets.
shaft splines.
h. Insert the snap rings in grooves.
8-16. CHECKING BRAKE DRUMS.
i.
Oil the cam roller.
(Use a new roller and
shaft if the camshaft is replaced.)
a . Scored or barrel-shaped drum - Drum will
need turning down if a .010 in. (.254 mm) wire will
j. Hook up shoe retainer springs.
pass between the drum and a straightedge placed on
the brake drum surface (see figure 8-3).
Turn the slack adjuster manual
k.
adjusting screw to get the slack ad-
b . B e l l m o u t h i n g - Drums can be checked for
juster in position to insert the yoke
i n s i d e diameters at both edges of lining contact
pin.
Install the hub and drum (see Section 11).
l.
points, Differences in diameter of more than .010 in.
(.254 mm) should be turned out (see figure 8-4).
m. Adjust the brakes (see Section 4).
c. Recondition out-of-round brake drums. Check
with inside micrometer or dial indicator (see figure
8-5). All out-of-round condition should be cor-
8-13.
RELINING BRAKES - AIR.
rected.
See Section 4 for inspection of brake linings
8-14.
8-2.