TM 9-4940-568-34
3-125
3-38. HOIST MOTOR CONTROL VALVE REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP
Tools
Tool Kit, General Mechanic’s
(Item 67, Appendix F)
Materials/Parts
Hydraulic oil (Item 16, Appendix B)
Lockwasher (4) (Item 67, Appendix E)
Packing, preformed (2) (Item 80, Appendix E)
Packing, preformed (Item 106, Appendix E)
Packing, preformed (Item 124, Appendix E)
Packing, preformed (Item 125, Appendix E)
Packing, preformed (5) (Item 121, Appendix E)
Equipment Condition
FRS unloaded, (TM 9-4940-568-10).
Holding valve removed (para 3-39).
Special Environmental Conditions
Cleanliness is extremely important when working
on hydraulic equipment. Clean all parts before
disassembly and work in a clean area.
General Safety Instructions
To avoid personal injury, always assume
hydraulic lines have pressure. Slowly crack
hydraulic lines open to allow all pressure to
escape. Always wear safety glasses.
a.
Removal
NOTE
To aid in later installation, be sure
to plug all lines as necessary,
and tag all lines and their
connection points.
Place a container to catch
hydraulic oil during removal of
hydraulic lines.
(1) Disconnect
two
hoses
(1)
and
preformed packings (2) from fittings (3).
Discard preformed packings.
(2) Disconnect hose (4) and preformed
packing (5) from fitting (6). Discard
preformed packing.
(3) Remove four screws (7), lockwashers
(8), and hoist control valve (9) from
hydraulic
motor
(10).
Discard
lockwashers.
