TM9-2330-372-14&P
h. Inspect brake assembly as follows:
(1) Check brake linings (2, fig. 7) for excessive wear (less than 1/16-inch above rivet heads), surface glaze,
grease, oil or dirt.
(2) Check cam shaft (13) and rollers (6) for excessive wear or damage.
(3) Check anchor pins (11) for wear and security.
(4) Check brake drum for uneven wear or deformation.
i. Remove nuts (25, fig. 7), lock washers (24), anchor pin lock rings (12), anchor pin links (10) and anchor pins
(11).
j. Remove brake shoe return spring (9) and brake shoes (1).
k. Remove lock ring (3), rollershaft (7) and roller (6) from brake shoe.
l. Remove slack adjuster (17) and cam shaft (13) as follows:
(1) Remove cotter pin (16, fig. 12), washer (15) and clevis pin (13) connecting air chamber piston rod clevis
(14) to slack adjuster (17, fig. 7).
NOTE
On front axle, also remove cotter pin, clevis pin and clevis attaching handbrake cable to slack adjuster.
(2) Remove two lock rings (18, fig. 7) from cam shaft (13).
(3) Remove slack adjuster (17) from cam shaft (13).
(4) Remove cam shaft (13) along with seals (14), washer (23), bushing (22) and washer (20).
m. Remove eight nuts (21, fig. 7), washers (28) and bolts (26). Remove spider (27). Remove lube fittings (16)
from spider.
n. Reassemble brake in reverse order of steps a through m.
o. Adjust brakes (para. 4-18).
4-20. SERVICE WHEEL BEARINGS. To service wheel bearings refer to para. 4-19, (steps a through e) and proceed
as follows:
a. Thoroughly clean bearing cones and cups with dry cleaning solvent (App. E, item 2). Allow to dry. Do not spin
with air pressure.
b. Inspect bearing rollers for indications of wear and overheating. Wear is indicated if roller surfaces appear frosted
or if the surface is pitted. A blue color indicates that rollers have been overheated. Check roller cage for wear or
damage. Replace the bearing cone if any of these conditions exist.
4-18
