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 575 of 863
TM 9-2320-269-34-2
16-30. BOOM SWING MECHANISM REPLACEMENT (M819)
THIS TASK COVERS:
a. Removal
b. Installation
APPLICABLE MODELS
M819
TOOLS
General mechanic’s tool kit
(Appendix B, Item 1)
1-1/8 in. open-end wrench
(Appendix B, Item 121)
1-11/16 in. open-end wrench
(Appendix B, Item 127)
Lifting device
Chains
MATERIALS/PARTS
Gasket (Appendix D, Item 59)
Six lockwashers (Appendix D, Item 215)
Woodruff key (Appendix D, Item 546)
Cap and plug set (Appendix C, Item 6)
Antiseize tape (Appendix C, Item 50)
REFERENCES (TM)
LO 9-2320-260-12
TM 9-2320-260-10
TM 9-2320-260-34P-2
EQUIPMENT
CONDITION
• Parking brake set (TM 9-2320-260-10).
• Drain gear oil from boom swing mechanism
(LO 9-2320-260-12).
GENERAL SAFETY INSTRUCTIONS
• All personnel must stand clear during lifting
operations.
• Ensure lifting capacity is greater than weight of
swing mechanism.
a. Removal
1.
2.
3.
4.
5.
6.
7.
• Clean area around hoses and lines before removal to prevent
entry of dirt. Damage will occur if dirt or dust enters system.
• Cap or plug all openings immediately after disconnecting lines
and hoses to prevent contamination. Remove caps or plugs
before installation. Failure to do so may result in hydraulic
system damage.
NOTE
• Have drainage container ready to catch oil.
• Tag hoses for installation.
• Mark positions of h hydraulic motor fittings for installation.
Loosen swivel nuts (5) and (7) and disconnect hoses (10) and (12) from adapter elbows (4) and (6).
Loosen swivel nut (9) on angle adapter (8) and disconnect drain hose (11) from angle adapter (8).
Remove six screws (15) and Iockwashers (14) from flange of boom swing mechanism (13). Discard
lockwashers (14).
Remove hydraulic motor (3) and coupling (1) from boom swing mechanism (13).
Remove coupling (1) and woodruff key (2) from shaft of hydraulic motor (3) and boom swing
mechanism (13). Discard woodruff key (2).
Remove three nuts (18) from studs (17) on housing (16).
Attach chains to boom swing mechanism (13) and lifting device.
WARNIN G
• All personnel must stand clear during lifting operations,
A swinging or shifting load may cause injury to personnel,
• Ensure lifting capacity is greater than weight of boom swing
mechanism. Failure to do so may result in injury to personnel
or damage to equipment.
16-176
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