TM 9-2330-203-14&P
4-32. AIRBRAKE CHAMBER MAINTENANCE (M197 AND M198) (Con't).
c. INSPECTION
1.
Inspect all parts for cracks, breaks, corrosion, or other damage. If body, cover, rod, or flatwasher are damaged,
replace entire airbrake chamber.
2.
Replace all damaged parts.
d. ASSEMBLY
WARNING
Use caution when assembling airbrake chamber. Springs 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 flatwasher (5) on rod (4).
2.
Assemble body (8), two new springs (7 and 6), rod (4), new diaphragm (3), and cover (2). Secure in a vise.
3.
Secure cover (2) to body (8) using 18 new bolts (1), new lockwashers (9), and new nuts (10). Remove from vise.
4.
Install nut (11) and clevis (13) on rod (4). Tighten nut against clevis.
e. INSTALLATION
1.
Position airbrake chamber for installation. Ensure that rod (4) is properly seated in master cylinder.
2.
Secure airbrake chamber to bracket using two new lockwashers (16) and nuts (15).
3.
Connect clevis (13) to slack adjuster using straight pin (14) and new cotter pin (12).
4.
Apply antiseizing tape to threads of tube assembly (17). Connect tube assembly to cover (2).
5.
Connect intervehicular air hoses to towing vehicle (para 2-10).
NOTE
Length of rod may require adjusting to maintain the proper angle between rod and slack
adjuster. With brakes released, angle should be greater than 90 0. Slack adjuster should
never travel over the center in the applied position.
6.
Apply and release brakes and check angle between rod (4) and slack adjuster. Adjust each clevis (13) to obtain
the proper length. Apply brakes to test operation and adjust rod again if necessary.
FOLLOW-ON TASKS:
Perform air leakage test (para 4-31).
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