TM 9-2320-269-20-2
DERRICK LEG EXTENSION HYDRAULIC DRIVE LINES
This task covers:
a. Removal (page 2-986)
c. Inspection/Replacement (page 2-989)
b. Cleaning (page 2-989)
d. Installation (page 2-989)
INITIAL SETUP
Tools
Materials/Parts - Continued
Fish tape, 50-ft reel
Solvent, drycleaning (item 28, appendix C)
Pail, utility, 3-qt
Tags, marking (item 29, appendix C)
Wrench, open-end, 9/16-inch
Tape, teflon (item 32, appendix C)
Wrench, open-end, 11/16-inch
Wrench, open-end, 718-inch
Personnel Required
Wrench, open-end, 1-inch
Two
Materials/Parts
Equipment Condition
Detergent, non-sudsing (item 12,
appendix C)
Console cover removed (page 2-1092).
Rags, wiping (item 24, appendix C)
ACTION
LOCATION
ITEM
REMARKS
REMOVAL
1.
Swivel
Valve-to-extension
a. Position pail to catch hydraulic fluid.
adapter (1)
cylinder hose
b. Using 11/16-inch and 7/8-inch
assembly (2)
wrenches, unscrew and take off.
c. Tag hose (2).
d. Dispose of drained fluid.
2.
Swivel
Valve-to-extension
a. Using 11/16-inch and 7/8-inch
adapter (3)
cylinder hose
wrenches, unscrew and take off.
assembly (4)
b. Tag hose (4).
90 swivel
3.
Valve-to-extension
a. Using 11/16-inch and 7/8-inch
adapter (5)
cylinder hose
wrenches, unscrew and take off.
assembly (2)
b. Tag hose (2).
90swivel
4.
Valve-to-extension
a. Using 11/16-inch and 718-inch
adapter (6)
cylinder hose
wrenches, unscrew and take off.
assembly (4)
b. Tag hose (4).
5.
Derrick mast (7)
Two valve-to-exten-
With help from assistant, take out.
and console (8)
sion cylinder hose
assemblies (2) and (4)
2-986
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