TM-9-2320-272-24-3
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 3 OF 4
JUNE 1998
TM-9-2320-272-24-3 - Page 244 of 799
TM 9-2320-272-24-3
4-84. TRANSFER CASE FRONT AXLE ENGAGEMENT AIR CYLINDER REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
All
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
Torque wrench (Appendix E, Item 146)
MATERIALS/PARTS
Antiseize tape (Appendix C, Item 72)
REFERENCES (TM)
TM 9-2320-272-10
TM 9-2320-272-24P
EQUIPMENT CONDITION
l
Parking brake set (TM 9-2320-272-10).
l
Air reservoirs drained (TM 9-2320-272-10).
l
Transfer case-to-forward rear axle propeller shaft
removed (M936/A1/A2) (para. 3-150).
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
1.
Remove air line (2) and elbow (1) from air cylinder cover (3).
2.
Bend tabs of locking washers (11) away from heads of screws (10).
3.
Remove four screws (10), locking washers (11), air cylinder cover (3), air cylinder (8), and seal (6)
from transfer case (4).
4.
Remove washers (5) and (9) from transfer case (4) and air cylinder cover (3).
5.
Remove plunger (7) from air cylinder (8).
b. Installation
1.
Install plunger (7) in air cylinder (8).
2.
Install washers (5) and (9) on transfer case (4) and air cylinder cover (3).
3.
Install seal (6), air cylinder (8), and air cylinder cover (3) on transfer case (4) with four locking
washers (11) and screws (10). Tighten screws (10) 6-10 lb-ft (8-14 N
l
m).
4.
Bend tabs of locking washers (11) over heads of screws (10).
NOTE
Wrap all male threads with antiseize tape before installation.
5.
Install elbow (1) and air line (2) on air cylinder cover (3).
4-508
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