TM-9-2320-260-34-2
TRUCK, 5-TON, 6X6, M809 SERIES (DIESEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE; VOLUME 2 OF 2
JULY 1994
TM-9-2320-260-34-2 - Page 587 of 863
TM 9-2320-260-34-2
16-33. BOOM LIFT CYLINDER MAINTENANCE (M819)
THIS TASK COVERS:
a. Removal
d. Repair
b. Disassembly
e. Assembly
c. Cleaning and Inspection
lNITIAL SETUP
APPLICABLE MODELS
PERSONNEL REQUIRED
M819
Two
TOOLS
GeneraI mechanic’s tool kit
(Appendix B, Item 1)
14-in. pipe wrench (Appendix B, Item 129)
1-5/8-in. open-end wrench
(Appendix B, Item 126)
1-11/16-in. open-end wrench
(Appendix B, Item 127)
Bushing driver (Appendix B, Item 131)
Chain
Lifting device
REFERENCES (TM)
LO 9-2320-260-12
TM 9-2320-260-10
TM 9-2320-260-20
TM 9-2320-260-34P-2
EQUIPMENT CONDITION
• Remove lift cylinder check valve (para. 16-38).
• Remove spare tire (TM 9-2320-260-10).
• Remove cab side window (TM 9-2320-260-20).
• Drain hydraulic oil tank (LO 9-2320-260-12).
MATERlALS/PARTS
GENERAL SAFETY lNSTRUCTIONS
T
wo Cotter pins (Appendix D, Item 17)
l All personnel must stand clear during lifting
Seal (Appendix D, Item 408)
operations.
Seal (Appendix D, Item 409)
l Ensure lifting capacity is greater than weight of
Seal (Appendix D, Item 410)
boom lift cylinder.
Seal (Appendix D, Item 412)
Seal (Appendix D, Item 413)
Lubricating oil (Appendix C, Item 20)
GM grease (Appendix C, Item 14)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Raise boom (6) to maximum height and hold with hoist or securely block. Maximum angle is
41 degrees (TM 9-2320-260-10),
Loosen two jamnuts (2) and remove two setscrews (1) from boom trunnions (3).
Drive out pivot shaft (8) from boom (6) and trunnion (4) on piston rod (5).
Remove elbow (14) and pipe (15) from elbow (16).
Remove elbow (16) and nipple (17) from lower port (20) of lift cylinder (22).
Remove hose (13) from tube (24) and elbow (12).
Remove elbow (12) and nipple (11) from port (10) in cylinder head (9).
Attach chain to lift cylinder (22) and lifting device. Take up slack in chain.
NOTE
Assistant will help with steps 9 and 10.
Remove cotter pin (23) and pivot pin (19) from lower trunnion of Iift cylinder (22) and boom support
bores (21). Discard cotter pin (23).
16-188
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