TM 9-2330-203-14&P
4-33. AIRBRAKE CHAMBER MAINTENANCE (M197A1 AND M198A1) (Con't).
b.
DISASSEMBLY
WARNING
Use caution when disassembling airbrake chamber. Spring is under tension.
Failure to follow this warning may cause components inside airbrake chamber to
fly apart, causing injury to personnel.
1.
Place airbrake chamber in a vise. Remove 18 nuts (10), lockwashers (11), and screws (13) securing cover (1) to
body (7). Discard lockwashers, nuts, and screws.
2.
Separate body (7), cover (1), and diaphragm (2). Remove pushrod (3) and spring (4). Discard diaphragm and
spring.
3.
Remove preformed packing (6) and seal (5) from pushrod (3). Discard preformed packing.
c.
INSPECTION
1.
Inspect all parts for cracks, breaks, corrosion, or othe r damage. If cover, seal, pushrod, or body are damaged,
replace entire airbrake chamber.
2.
Replace all damaged parts.
d.
ASSEMBLY
WARNING
Use caution when assembling airbrake chamber. Spring Inside airbrake chamber
will be placed under tension. Failure to follow this warning may cause components
inside airbrake chamber to fly apart, causing injury to personnel.
1.
Install seal (5) and new preformed packing (6) on pushrod (3).
2.
Assemble body (7), new spring (4), pushrod (3), new diaphragm (2), and cover (1). Secure in a vise.
3.
Secure cover (1) to body (7) using 18 new screws (13), new lockwashers (11), and new nuts (10). Remove from
vise.
e.
INSTALLATION
1.
Position airbrake chamber for installation. Ensure that pushrod (3) is properly seated in master cylinder.
2.
Secure airbrake chamber to bracket using two new lockwashers (8) and nuts (9).
3.
Apply antiseizing tape to threads of tube assembly (12). Connect tube assembly to cover (1).
FOLLOW-ON TASKS:
Connect intervehicular air hoses to towing vehicle (para 2-10).
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