TM-9-2320-272-24-4
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4
JUNE 1998
TM-9-2320-272-24-4 - Page 612 of 836
5-101. WINCH,
5-102. BOOM
TM 9-2320-272-24-4
Section VII. WINCH, HOIST, AND POWER TAKEOFF MAINTENANCE
PARA.
NO.
TITLE
PAGE
NO.
5-102.
Boom Elevating Cylinder Repair
5-606
5-103.
Boom Elevating Cylinder Packing Replacement
5-610
5-104.
Dump Roller Arm Maintenance
5-612
5-105.
Dump Hoist Cylinder Maintenance
5-614
5-106.
Boom Extension Cylinder Repair
5-626
5-107.
Crane Swinger Gearcase Repair
5-630
5-108.
Crane Control Valve Repair
5-636
THIS TASK COVERS:
a.
Disassembly
c. Assembly
b.
Cleaning, Inspection, and Repair
INITIAL SETUP:
APPLICABLE MODELS
M936/A1/A2
SPECIAL TOOLS
Bushing installer (Appendix E, Item 23)
Handle (Appendix E, Item 61)
TOOLS
General mechanic’s tool kit (Appendix E, Item 1)
Spanner wrench (Appendix E, Item 166)
MATERIALS/PARTS
Piston seal (Appendix D, Item 519)
Rod seal (Appendix D, Item 560)
O-ring (Appendix D, Item 465)
Lockwire (Appendix D, Item 420)
Wiper strip (Appendix D, Item 720)
Packing (Appendix D, Item 510)
MATERIALS/PARTS (CONTD)
Crocus cloth (Appendix C, Item 20)
Lint-free cloth (Appendix C, Item 21)
Drycleaning solvent (Appendix C, Item 71)
REFERENCES (TM)
LO 9-2320-272-12
TM 9-2320-272-10
TM 9-2320-272-24P
EQUIPMENT CONDITION
• Parking brake set (TM 9-2320-272-10).
• Boom elevating cylinder removed (para. 4-193)
GENERAL SAFETY INSTRUCTIONS
Keep fire extinguisher nearby when using
drycleaning solvent.
Drycleaning solvent is flammable. Do not use
near open flame.
1.
Using spanner wrench, remove cylinder head (2) from elevating cylinder body (3).
2.
Remove piston rod (1) from elevating cylinder body (3).
3.
Remove lockwire (17), nut (18), washer (16), retainer (15), seal (14), piston (13), rod seal (5), cylinder
head (2), and wiper strip (8) from piston rod (1). Discard lockwire (17), piston seal (14), rod seal (5),
and wiper strip (8).
5-606
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