TM 5-3810-294-34
CHAPTER 18
REPAIR OF CARRIER BRAKES
Section I. REPAIR OF FRONT BRAKES
Lining worn to within 1/16 inch of rivet heads
18-1. Description
should be replaced.
(4) Inspect brake drum for cracks, scoring, or
The front brakes are air actuated two-shoe brakes
other damage and replace if necessary.
Each brake shoe has a one-piece liner of uniform
(5) Inspect all parts for excessive wear or other
thickness.
damage, and replace defective parts.
c. Reassembly and Installation.
18-2. Front Service Brakes
(1) Install camshaft (29, fig. 16-6).
a. Removal and Disassembly.
(2) Install bushing (39), slack adjuster (96),
( 1) Remove wheels (refer to TM 5-3810-294-
and retaining ring (98).
201.
(3) Connect air brake chamber push rod to
(2) Remove screws (1, fig. 16-6), lockwashers
slack adjuster.
121, plate (3), packing (4), washer (5), and
(4) Slide brake shoes (28 and 27) over anchor
retaining ring (6).
pins (32). Install brake shoe retainer (25) and bolts
(3) Remove nuts (8), lockwashers (9), flange
(24), then install brake shoe return spring.
(71. gasket (101, and packing (11).
(5) Pack bearing (33) with grease and slide it
(4) Remove nut (121, washer (13), lockwasher
onto spindle (37). If bearing cups were removed,
(14), and bearing adjusting nut (15).
press replacement cups into hub (21).
(5) Remove outer wheel bearing (16).
(6) Install hub (21) and drum (22) as a unit.
(6) Remove hub (21) and drum (22) as an
Pack outer wheel bearing (16) with grease and slide
assembly. Remove bearing (33). Bearing cups (17
it onto spindle.
and 31 ) are press fit into the hub and should not be
(7) Install bearing adjusting nut (15). Turn
removed unless absolutely necessary.
adjusting nut up tight, then back off one-quarter
(7) Remove spring (26) from brake shoes (27
turn. Spin wheel in both directions and check for
and 28). Remove bolts (24) and retainer (25), and
free rotation without excessive end play. Readjust
slide brake shoes from anchor pins (32).
nut as necessary.
(8) Disconnect air brake chamber (102) from
(8) Install lockwasher (14!, washer (13), and
slack adjuster (96).
nut (12). Tighten nut securely.
(9) Remove retaining ring (98), slack adjuster
(9) Install packing (11), gasket (10), flange
(96), and spacers (95) from camshaft (29). Tap
(7), lockwashers (9), and nuts (8). Tighten nuts
camshaft from flange (59). Do not remove bushing
securely.
(391 unless replacement is necessary. Bushing is
(10) Install retaining ring (6), washer (5),
press fit.
plate (3), lockwashers (2) and screws (1).
b. Cleaning, Inspection, and Repair.
(11) Install wheels (refer to TM 5-3810-294-
( 1) Clean all parts except brake linings with an
20).
approved cleaning solvent. Wipe parts dry, but
(12) Adjust brakes (refer to TM 5-3810-294-
allow bearings to air dry.
20).
(2) Inspect bearings and bearing cups for
pitting, scoring, or other damage. Replace defective
bearings or bearing cups.
(3) Inspect brake linings for excessive wear.
18-1
