TM-9-2320-272-24-2

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4

JUNE 1998

  TM-9-2320-272-24-2 - Page 70 of 991

TM 9-2320-272-24-2
3-239. STEERING GEAR-TO-ASSIST CYLINDER PRESSURE LINES REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP:
APPLICABLE MODELS
REFERENCES (TM)
All
TM 9-2320-272-10
TOOLS
WARNING
Do not start engine when power steering hoses are disconnected.
Pressure may whip hoses, causing injury to personnel.
TM 9-2320-272-24P
EQUIPMENT CONDITION
• Parking brake set (TM 9-2320-272-10).
• Left splash shield removed (TM 9-2320-272-10).
GENERAL SAFETY INSTRUCTIONS
Do not start engine when power steering hoses are
disconnected.
General mechanic’s tool kit (Appendix E, Item 1)
MATERIALS/PARTS
Two O-rings (Appendix D, Item 435)
Two locknuts (Appendix D, Item 313)
Tiedown strap (Appendix D, Item 690)
Cap and plug set (Appendix C, Item 14)
Antiseize tape (Appendix C, Item 72)
Cap or plug all openings immediately after disconnecting lines
and hoses to prevent contamination. Failure to do so may result
in damage to equipment.
1.
Remove two locknuts (17), screws (4), spacers (5), and four clamps (6) from crossmember (16).
Discard locknuts (17).
NOTE
• Have drainage container ready to catch hydraulic oil.
• Step 2 applies to Ross steering gears only.
• Steps 3, 4, and 5 apply to Sheppard steering gears only.
2.
Loosen nuts (11) and (14) and remove pressure lines (12) and (15) from elbow (13) and adapter (10).
3.
Loosen nuts (25) and (27) and remove pressure lines (12) and (15) from elbows (24) and (26).
4.
Loosen nut (23) and remove elbows (24) and (26) from extension line (22) and elbow (13).
5.
Loosen nut (21) and remove extension line (22) from adapter (10).
6.
Remove adapter (10) and O-ring (9) from steering gear (7). Discard O-ring (9).
7.
Remove elbow (13) and O-ring (8) from steering gear (7). Discard O-ring (8).
8.
Remove tiedown strap (2) from pressure lines (12) and (15). Discard tiedown strap (2).
9.
Loosen two nuts (18) and disconnect pressure lines (12) and (15) from two elbows (3).
10.
Disconnect two hoses (19) from elbows (3).
11.
Remove two nuts (20) and elbows (3) from frame rail (1).
3-670


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