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TM 5-2420-222-20-3
BOOM-TO-JAW CYLINDER OIL HOSE OIL LINES (SERIAL NUMBERS 319995 THRU 342573 ONLY)
ACTION
LOCATION
ITEM
REMARKS
JAW DIRECT LINEAR VALVE (SERIAL NUMBERS 319995 THRU 342573 ONLY)
This task covers:
a.
Removal (page 2-1538)
d.
Inspection/Replacement (page 2-1541)
b.
Disassembly (page 2-1540)
e.
Assembly (page 2-1542)
c.
Cleaning (page 2-1540)
f.
Installation (page 2-1542)
INITIAL SETUP
Tools
Materials/Parts - Continued
Handle, ratchet, 3/8-inch drive
Rags, wiping (item 21, Appendix C)
Pan, drain
Solvent, drycleaning (item 28, Appendix C)
Socket, 3/8-inch drive, 9/16-inch
Tags, marking (item 30, Appendix C)
Wrench, open-end, 3/4-inch
Wrench, open-end, 718-inch
Personnel Required
Materials/Parts
One
Detergent, GP (item 7, Appendix C)
Equipment Condition
Lockwasher, guard screw
(two required)
Hydraulic system pressure released
Nut, special
(page 2-1191)
ACTION
LOCATION
ITEM
REMARKS
NOTE
Both boom-to-jaw cylinder oil hose oil lines are maintained the same way. Oil line-to jaw cylinder rod
end is shown. Repeat procedures as needed for jaw cylinder head end oil line.
REMOVAL
WARNING
Do not attempt to disconnect hydraulic lines and fittings while engine is running or before hydraulic
system pressure has been released. When engine is running, hydraulic system is under pressure.
Hydraulic system pressure should be 0 psi (0 kPa) before lines are disconnected. A line or fitting
disconnected under pressure will blow off with a lot of force and could cause serious injury to
personnel.
Be careful when draining hot fluids. Wear gloves to protect your hands from hot parts and fluids or
severe burns could result.
2-1538
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