TM-9-2320-272-24-1
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 1 OF 4
JUNE 1998
TM-9-2320-272-24-1 - Page 936 of 1015
TM 9-2320-272-24-1
3-205. AIR RESERVOIR DRAINVALVES REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
All
REFERENCES (TM)
TM 9-2320-272-10
TOOLS
TM 9-2320-272-24P
General mechanic’s tool kit (Appendix E, Item 1)
EQUIPMENT CONDITION
MATERIALS/PARTS
l
Parking brake set (TM 9-2320-272-10).
l
Air reservoirs drained (TM 9-2320-272-10).
Two locknuts (Appendix D, Item 274)
Antiseize tape (Appendix C, Item 72)
GENERAL SAFETY INSTRUCTIONS
Do not disconnect air lines before draining air
reservoirs.
WARNING
Do not disconnect air lines before draining air reservoirs. Small
parts under pressure may shoot out with high velocity, causing
injury to personnel.
a. Removal
NOTE
If removing more than one drainvalve, tag air lines for
installation.
1.
Disconnect air drain line (8) from coupling adapter (7).
2.
Remove two locknuts (2), U-bolt (6), and drainvalve coupling (5) from bracket (1) at rear of right cab
access step (4). Discard locknuts (2).
3.
Remove coupling adapter (7) and drainvalve (3) from drainvalve coupling (5).
b. Installation
NOTE
Wrap all male pipe threads with antiseize tape before installation.
1.
Install drainvalve (3) and coupling adapter (7) on drainvalve coupling (5).
2.
Install drainvalve coupling (5) on bracket (1) of right cab access step (4) with U-bolt (6) and two new
locknuts (2).
3.
Connect air drain line (8) to coupling adapter (7).
3-572
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