TM 9-4940-568-34
6-49
6-11. BOOM TELESCOPIC CYLINDER REPAIR
THIS TASK COVERS:
a. Disassembly
b. Cleaning/Inspection
c. Assembly
INITIAL SETUP
Tools
Tool Kit, General Mechanic’s
(Item 67, Appendix F)
Pan, drain (Item 42, Appendix F)
Materials/Parts
Hydraulic oil (Item 16, Appendix B)
Kit, repair (Item 32, Appendix E)
Kit, repair (Item 36, Appendix E)
Kit, repair (Item 37, Appendix E)
Personnel Required
2 Assistants
Equipment Condition
Boom telescopic cylinder removed (para 3-15).
Special Environmental Conditions
Cleanliness is extremely important when working
on hydraulic equipment. Clean all parts before
disassembly and work in a clean area.
a.
Disassembly
NOTE
Place a container to catch
hydraulic oil during disassembly.
Disassemble lower cylinder first.
(1) Remove cartridge holding valve (1) from
rod (2).
(2) Remove three backup rings (3) and
preformed packings (4) from cartridge
holding valve (1). Discard backup rings
and preformed packings.
(3) Remove plug (5) from rod (2).
(4) With help from assistant, remove four
screws (6) from retaining plate (7).
(5) Remove rod (2) from telescopic cylinder
(8).
