TM-9-2320-260-20
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
APRIL 1995
TM-9-2320-260-20 - Page 641 of 1337
TM 9-2320-260-20
I
8-9. SERVICE BRAKE ADJUSTMENT
THIS TASK COVERS:
Service Brake Adjustment
INITIAL SETUP
APPLICA8LE MODELS
EQUIPMENT
CONDITION
All
●
Parking brake set (TM 9-2320-260-10).
●
Front or rear wheels removed (para. 9-3).
MATERIALS/PARTS
●
Wheel bearing adjusted (para. 9-6).
Lockwasher
REFERENCES (TM)
TM 9-2320-260-10
TM 9-2320-260-20P
NOTE
●
The front and rear brakes are adjusted the same way. This
procedure covers the front brakes only.
●
Allow brakes to cool before adjusting.
I
Service
Brake Adjustment
I
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
Remove nut (1), lockwasher
(2),
and inspection slot cover (3) from brakedrum (4). Discard
lockwasher (2).
Turn brakedrum (4) to position inspection slot (5) at 8 o’clock location.
Loosen jamnut (10) on anchor pin (11) one full turn.
Turn anchor pin (11) clockwise or counterclockwise until gap between brakeshoe lining (7) and inner
brakedrum surface (6) measures .010 in. (.25 mm).
Turn brakedrum (4) to position inspection slot (5) at 11 o’clock location.
Turn cam stud (9) clockwise until gap between brakeshoe lining (7) and inner brakedrum surface (6)
measures .020 in. (.50 mm).
Turn brakedrum (4) to position inspection slot (5) at 5 o’clock location.
Loosen jamnut (12) on anchor pin (13) one full turn.
Turn anchor pin (13) clockwise or counterclockwise until gap between brakeshoe lining (7) and inner
brakedrum surface (6) measure .010 in. (.25 mm).
Turn brakedrum (4) to position inspection slot (5) at 1 o’clock location.
Turn cam stud (8) counterclockwise until gap between brakeshoe lining (7) and inner brakedrum
surface (6) measures .20 in. (.50 mm).
Install inspection slot cover (3) on brakedrum (4) with new lockwasher (2) and nut (1).
Turn brakedrum (4) by hand and turn cam stud (8) counterclockwise until brakedrum (4) drags.
Loosen cam stud (8) until brakedrum (4) slightly drags.
Turn brakedrum (4) by hand and turn cam stud (9) clockwise until brakedrum (4) drags. Loosen cam
stud (9) until brakedrum (4) slightly drags.
Repeat steps 1 through 14 to perform service brake adjustment of other wheel on axle.
8-16
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