TM 9-2320-366-34-4
26-11. M1089 BOOM TELESCOPIC CYLINDER REPAIR
This task covers:
a. Disassembly
b. Cleaning/Inspection
c. Assembly
INITIAL SETUP
Tools and Special Tools
Tool Kit, Genl Mech (Item 78, Appendix B)
Wrench, Torque, 0-175 lb-ft (Item 92,,Appendix
B)
Hammer, Non-sparking (Item 32, Appendix B)
Gloves, Rubber (Item 26, Appendix B)
Goggles, Industrial (Item 28, Appendix B)
Sling, Cargo (Item 56, Appendix B)
Materials/Parts
Rag, Wiping (Item 60, Appendix C)
Lubricating Oil, Engine (Item 46, Appendix C)
Solvent, Dry Cleaning (Item 83, Appendix C)
Kit, Repair (Item 101, Appendix F)
Materials/Parts (Cont)
Kit, Repair (Item 97, Appendix F)
Packing, Preformed (Item 269, Appendix F)
Retainer, Packing (2) (Item 357.1, Appendix F)
Retainer, Packing (Item 357.2, Appendix F)
Packing, Preformed (Item 257.1, Appendix F)
Packing, Preformed (Item 255.1, Appendix F)
Personnel Required
(2)
WARNING
Boom
telescopic
cylinder
weighs
approximately 230 lbs (104 kgs). Attach a
suitable lifting device prior to repair.
Failure to comply may result in injury to
personnel or damage to equipment.
a. Disassembly.
NOTE
Disassemble lower cylinder first.
(1) Remove cartridge holding valve (1) from rod (2).
(2) Remove three back-up rings (3) and preformed packings
(4) from cartridge holding valve (1). Discard preformed
packings and back-up rings.
(3) Remove plug (5) from rod (2).
Change 1
26-67
