TM-9-2320-361-20
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; UNIT MAINTENANCE
OCTOBER 1991
TM-9-2320-361-20 - Page 651 of 1207
TM 9-2320-361-20
8-32. AIRBRAKE CUTOFF VALVES AND COUPLINGS REPLACEMENT (M764)
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
M764
MATERIALS/PARTS
Two drivescrews
Lockwasher
Antiseize tape (Appendix C, Item 27)
GENERAL SAFETY INSTRUCTIONS
Do not disconnect air couplings before draining air
reservoirs.
REFERENCES (TM)
TM 9-2320-361-10
TM 9-2320-361-20P
EQUIPMENT CONDITION
Parking brake set (TM 9-2320-361-10).
Air reservoirs drained (TM 9-2320-361-10).
a.
Removal
WARNING
Do not disconnect air couplings before draining air reservoirs.
Small parts under pressure may shoot out with high velocity,
causing injury to personnel.
NOTE
The right emergency and left service couplings and cutoff valves are
replaced the same. This procedure covers the right side of service
brake.
1. Remove dummy coupling (11) from coupling half (10).
2. Remove chain (12) and dummy coupling (11) from frame (4).
3. Remove coupling half (10) from elbow (8).
4. Remove two drivescrews (13) and plate (9) from bracket (14). Discard drivescrews (13).
5. Remove elbow (8) from connector (6).
6. Remove air line (2) and elbow (1) from cutoff valve (15).
7. Remove nut (7), lockwasher (5), and cutoff valve (15) from frame (4). Discard lockwasher (5).
8. Remove connector (6) and nut (3) from cutoff valve (15).
NOTE
Wrap all male pipe threads with antiseize tape before installation.
1.
2.
3.
4.
5.
6.
7.
8.
9.
Install connector (6) and nut (3) on cutoff valve (15).
Install cutoff valve (15) with connector (6) on frame (4) with new lockwasher (5) and nut (7).
Install elbow (1) and air line (2) on cutoff valve (15).
Install elbow (8) on connector (6).
Install plate (9) on bracket (14) with two new drivescrews (13).
Install coupling half (10) on elbow (8).
Install chain (12) and dummy coupling (11) on frame (4).
Install dummy coupling (11) on coupling half (10).
Make sure cutoff valve (15) handle is turned to OFF position.
8-78
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