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 653 of 1207
TM 9-2320-361-20
8-33. AIRBRAKE CUTOFF VALVES AND COUPLINGS REPLACEMENT (M275A2, M342A2)
This task covers:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
EQUIPMENT CONDITION
M275A2, M342A2
Parking brake set (TM 9-2320-361-10).
MATERIALS/PARTS
Air reservoirs drained (TM 9-2320-361-10).
Lockwasher
GENERAL SAFETY INSTRUCTIONS
Antiseize tape (Appendix C, Item 27)
Do not disconnect air couplings before draining air
REFERENCES (TM)
TM 9-2320-361-10
TM 9-2320-361-20P
reservoirs.
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 (8) from coupling half (9).
2. Remove dummy coupling (8) and chain (11) from bracket (12).
3. Remove coupling half (9) from nipple (10).
4. Remove nipple (10) from cutoff valve (7).
5. Remove air line (2) and elbow (1) from connector (4).
6. Remove nut (13), lockwasher (3), and cutoff valve (7) from frame (12). Discard lockwasher (3).
7. Remove connector (4), nut (5), and elbow (6) from cutoff valve (7).
b. Installation
NOTE
Wrap all male pipe threads with antiseize tape before installation.
1.
2.
3.
4.
5.
6.
7.
8.
Install connector (4), nut (5), and elbow (6) on cutoff valve (7).
Install cutoff valve (7) on frame (12) with new lockwasher (3) and nut (13).
Install elbow (1) and air line (2) on connector (4).
Install nipple (10) on cutoff valve (7).
Install coupling half (9) on nipple (10).
Install chain (11) and dummy (8) on coupling half (9).
Install dummy coupling (8) on coupling half (9).
Make sure cutoff valve (7) handle is in OFF position.
8-80
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