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TM 5-2420-222-20-3
BOOM-TO-BACKHOE CONTROL VALVE HYDRAULIC IMPACTOR RETURN OIL LINE (SERIAL NUMBERS 319995
THRU 342573 ONLY)
This task covers:
a. Removal (page 2-1489)
d.
Inspection/Replacement (page 2-1494)
b. Disassembly (page 2-1492)
e.
Assembly (page 2-1495)
c. Cleaning (page 2-1494)
f.
Installation (page 2-1496)
INITIAL SETUP:
Tools
Materials/Parts - Continued
Handle, ratchet, 3/8-inch drive
Detergent, GP (item 7, Appendix C)
Knife, pocket
Nut, special (two required)
Pan, drain
Packing, adapter
Pliers, diagonal-cutting
Packing, union adapter
Pliers, slip-joint
Rags, wiping (item 21, Appendix C)
Socket, 3/8-inch drive, 9/16-inch
Solvent, drycleaning (item 28, Appendix C)
Vise, machinist’s
Tags, marking (item 30, Appendix C)
Wrench, box, 9/16-inch
Wrench, box, 11/4-inch
Personnel Required
Wrench, open-end, 9/16-inch
Wrench, open-end, 1 1/8-inch
One
Wrench, open-end, 1 1/4-inch
(two required)
Equipment Condition
Wrench, open-end, 1 3/8-inch
Backhoe valve box cover removed
Materials/Parts
(page 2-1157)
Band (as required)
ACTION
LOCATION
ITEM
REMARKS
REMOVAL
1.Loader backhoe
Boom, dipperstick,
a.
Extend as far as possible
and bucket
(TM 5-2420-222-10).
b.
Lower to ground so that boom and
dipperstick are horizontal
(TM 5-2420-222-10).
2.
Hydraulic system
Release pressure (page 2-1191).
2-1489
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