TM 9-2330-203-14&P
4-19. SERVICE BRAKE ASSEMBLY REPLACEMENT (M197 AND M198).
This task covers:
a Removal
c
Installation
b Cleaning and Inspection
Initial Setup:
Equipment Conditions:
Materials/Parts:
Slack adjuster disconnected from airbrake chamber
One retaining ring
Tools/Test Equipment:
Two seals
Seven lockwashers
General mechanic's tool kit
Brakeshoe spring pliers
Retaining ring pliers
a.
REMOVAL
WARNING
DO NOT handle brake shoes, brake drums, or other brake components unless area
has been properly cleaned. There may be asbestos dust on these components
which can be dangerous if you touch It or breathe It. Wear an approved filter mask
and gloves. Never use compressed air or a dry brush to clean brake components.
Dust may be removed using an Industrial-type vacuum cleaner. Clean dust or mud
away from brake components with water and a wet, soft brush or cloth. Failure to
follow this warning may result In serious Illness or death to personnel.
1.
Using brakeshoe spring pliers, remove two return springs (1) from two pivot pins (5).
2.
Remove slotted washer (2) from each pivot pin (5).
3.
Remove anchor pin strap (3) and two brake shoes (4) from two pivot pins (5).
4.
Using retaining ring pliers, remove retaining ring (14) and flatwasher (13) from camshaft (21). Discard retaining
ring.
5.
Remove two nuts (15), lockwashers (16), flatwashers (17), and bolts (18). Remove slack adjuster bracket (12)
from bracket (9) welded to axle (6). Discard lockwashers.
6.
Remove flatwasher (11) and spacer (10) from end of camshaft (21). Work camshaft out of two brackets (9 and 19)
and backing plate (20) until slack adjuster (8) can be removed from camshaft.
7.
Remove slack adjuster (8), two spacers (23 and 24), two flatwashers (25 and 26), and seal (27) from camshaft
(21). Discard seal.
NOTE
If camshaft is frozen In bearings or bracket, it may be necessary to heat bracket and
drive out camshaft with a punch.
8.
Remove camshaft (21), two flatwashers (22 and 31), and seal (30) from bracket (7). Discard seal.
9.
Remove three capscrews (29) and lockwashers (28). Remove bracket (19) from bracket (7). Discard lockwashers.
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