TM 9-2320-260-34-2
16-19. INNER BOOM MAINTENANCE (M816)
THIS TASK COVERS:
d. Assembly
a. Removal
e. Installation
b. Disassembly
c. Cleaning and Inspection
lNITIAL SETUP
MATERIALS/PARTS (Contd)
APPLICABLE MODELS
Cotter pin (Appendix D, Item 20)
M816
GAA grease (Appendix C, Item 14)
TOOLS
PERSONNEL REQUIRED
General mechanic's tool kit
Two
(Appendix B, Item 1)
Chain sling and spreader bar
REFERENCES (TM)
TM 9-237
Outside micrometer (Appendix B, Item 8)
TM 9-2320-260-34P-2
Inside micrometer (Appendix B, Item 9)
Jack stand
EQUIPMENT CONDITION
Lifting device
Boom assembly removed (para. 16-18).
Chain
Blocking
GENERAL SAFETY lNSTRUCTIONS
MATERIALS/PARTS
All personnel must stand clear during lifting
operations.
Eight Iockwashers (Appendix D, Item 223)
Four Iockwashers (Appendix D, Item 224)
Ensure lifting capacity is greater than weight of
Two locknuts (Appendix D, Item 172)
inner boom.
Two cotter pins (Appendix D, Item 46)
q The inner boom must be supported at all times to
prevent unbalancing of boom.
Cotter pin (Appendix D, Item 47)
WARNING
All personnel must stand clear during lifting operations.
q
A swinging or shifting load may cause injury or death to
personnel.
Ensure lifting capacity is greater than weight (700 lb (318 kg))
of inner boom. Failure to do so may result in injury to personnel
or damage to equipment.
Attach chain and lifting device on inner boom (2).
1.
2.
Raise inner boom (2) to remove weight from pin (4).
Remove cotter pin (5) and pin (4) from extension cylinder (3) and boom (1). Discard cotter pin (5).
3.
Remove cotter pin (11) and grease fitting (15) from shaft (14). Discard cotter pin (11).
4.
Remove four screws (12), Iockwashers (13), cover (10), shaft (14), and inner boom roller (9) from
5.
boom (1). Discard Iockwashers (13).
Remove eight screws (8), Iockwashers (7), and two stop plates (6) from boom (1). Discard
6.
Iockwashers (7).
16-112
