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 404 of 799

TM 9-2320-272-24-3
4-125. POWER STEERING GEAR ADJUSTMENT (ON-VEHICLE)
THIS TASK COVERS:
a. Sector Shaft Adjustment
b. Wormshaft Adjustment
INITIAL SETUP:
APPLICABLE MODELS
All
PERSONNEL REQUIRED
Two
TOOLS
EQUIPMENT CONDITION
General mechanic’s tool kit (Appendix E, Item 1)
Parking brake set (TM 9-2320-272-10).
Torque wrench (Appendix E, Item 144)
Left splash shield removed (para. 3-301).
REFERENCES (TM)
Drag link removed (para. 3-229).
TM 9-2320-272-10
a. Sector Shaft Adjustment
NOTE
Assistant will rotate steering wheel.
1.
Rotate steering wheel (1) full travel in both directions and note halfway point.
2.
Position steering wheel (1) at halfway point, and loosen jamnut (5) on right side of steering gear (2).
3.
Tighten sector shaft adjusting screw (6) 10 lb-ft (14 N·m).
4.
Turn sector shaft adjusting screw (6) counterclockwise one full turn.
5.
Holding adjusting screw (6), tighten jamnut (5) 40-45 lb-ft (54-61 N·m).
b. Wormshaft Adjustment
1.
Loosen jamnut (3) on wormshaft adjusting screw (4) on front of steering gear (2).
2.
Loosen wormshaft adjusting screw (4) one full turn counterclockwise.
3.
Tighten wormshaft adjusting screw (4) 5-6 lb-ft (7-8 N·m).
4.
Holding adjusting screw (4), tighten jamnut (3) 70-80 lb-ft (95-109 N·m).
NOTE
Assistant will rotate steering wheel.
5.
Rotate steering wheel (1) slightly in both directions and check for pulsations. If pulsations are felt,
repeat steps 1 through 5.
4-668


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