TM 9-2320-260-34-2
15-15. HOIST CYLINDER MAINTENANCE
THIS TASK COVERS:
d. Assembly
a. Removal
e. Installation
b. Disassembly
c. Cleaning and Inspection
INITIAL SETUP
PERSONNEL REQUIRED
APPLICABLE MODELS
Two
M817
REFERENCES (TM]
TOOLS
LO 9-2320-260-12
General mechanic's tool kit
TM 9-2320-260-10
(Appendix B, Item 1)
TM 9-2320-260-34P-2
Torque wrench, 3/8-in. dr.
(Appendix B, Item 4)
EQUIPMENT CONDITION
Ring compressor (Appendix B, Item 15)
q Roller arms removed (para. 15-14).
Spring tester (Appendix B, Item 10)
Lifting device
GENERAL SAFETY INSTRUCTIONS
Two chains
q Do not operate dump controls when dump body
MATERIALS/PARTS
is removed.
q All personnel must stand clear during lifting
Three ring, spacers (Appendix D, Item 519)
operations.
Fourteen lockwashers (Appendix D, Item 215)
q Ensure lifting capacity is greater than weight of
Four lockwashers (Appendix D, Item 218)
hoist cylinder.
Three piston rings (Appendix D, Item 319)
q Plugs are under spring tension. Release plugs
Packing (Appendix D, Item 301)
slowly.
Cotter pin (Appendix D, Item 16)
GAA grease (Appendix C, Item 14)
Lint-free cloth (Appendix C, Item 9)
Do not operate dump controls when dump body is removed. Injury
to personnel may result if lift cylinder is operated when not secured.
CAUTION
Cap or plug all openings immediately after disconnecting lines
and hoses to prevent contamination. Remove caps or plugs prior
to connection. Failure to do so may result in damage to equipment.
NOTE
Tag all lines and hoses for installation, Have drainage container
ready to catch hydraulic oil.
1. Remove two hydraulic hoses (1) from hoist cylinder (2).
2. Remove two screws (5), lockwashers (4), upper crosshead retainer (6), lower crosshead retainer (7),
and crosshead (3) from piston rod (8). Discard lockwashers (4).
3. Remove four screws (9), lockwashers (10), and two bearing caps (11) from hoist cylinder (2) and
subframe (12). Discard lockwashers (10).
4. Attach two chains on hoist cylinder (2) and lifting device.
15-38
