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Section VIII. PROPELLER SHAFTS, AXLES, AND SUSPENSION SYSTEM MAINTENANCE
TRANSFER CASE FRONT AXLE LOCK-IN CONTROL VALVE REPLACEMENT cont'd

TM-9-2320-272-24-1 Truck 5-Ton 6x6 M939 M939A1 M939A2 Series Trucks (Diesel) Manual
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TM 9-2320-272-24-1
3-147. TRANSFER CASE FRONT AXLE LOCK-IN CONTROL VALVE REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
EQUIPMENT CONDITION
APPLICABLE MODELS
l Parking brake set (TM 9-2320-272-10).
All
l Air reservoirs drained (TM 9-2320-272-10).
TOOLS
l Front axle lock-in switch removed (para 3-101).
l Fuel selector valve removed (if equipped)
General mechanic's tool kit (Appendix E, Item 1)
(para. 3-24).
MATERIALS/PARTS
GENERAL SAFETY INSTRUCTIONS
Antiseize tape (Appendix C, Item 72)
Do not disconnect air lines before draining air
REFERENCES (TM)
reservoirs.
TM 9-2320-272-10
TM 9-2320-272-24P
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
Tag air lines for installation.
1.
Disconnect control line (8) from front axle control valve elbow (7).
2.
Disconnect manifold tee supply line (1) from adapter fitting (2).
3.
Remove two screws (4), instruction plate (5), and control valve (3) from instrument panel (6).
b. Installation
NOTE
If new control valve is being installed, use fitting from old valve.
Clean all male pipe threads and wrap with antiseize tape before
installation.
1.
Install control valve (3) and instruction plate (5) on instrument panel (6) with two screws (4).
2.
Connect manifold tee supply line (1) to adapter fitting (2).
3.
Connect control line (8) to front axle control valve elbow (7).
3-404






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