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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) - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
REMOVAL - CONTINUED
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.
3.Adapter (1)
Hose (2)
a.
Place drain pan underneath.
b.
Using 1 1/8-inch and 1 1/4-inch open-
end wrenches, unscrew and take out.
c.
Cap (page 2-137).
d.
Tag (page 2-137).
4.Adapter (3)
Hose (4)
a.
Using 1 1/8-inch and 1 1/4-inch open-
end wrenches, unscrew and take out.
b.
Tag (page 2-137).
5.Union adapter (5)
Adapter (1)
a.
Note relative position for proper
with assembled parts
placement during installation.
b.
Using 1 1/4-inch and 1 3/8-inch open-
end wrenches, unscrew and take out.
6.Backhoe control
Union adapter (5)
a.
Using 1 114-inch box wrench, unscrew
valve (6)
with assembled
and take out.
packing (7)
b.
Plug valve (6) (page 2-137).
7.Union adapter (5)
Packing (7)
a.
Using pocket knife, take off.
b.
Get rid of.
8.Bracket (8) and
Screw (10) and
a.
Using 9/16-inch, 3/8-inch drive
clamp (9)
special nut (11)
socket, ratchet handle, and 9/16-inch
box wrench, unscrew and take apart.
b.
Get rid of special nut (11).
9.Bracket (8),
Clamp (9)
Take off.
isolator (12),
and hose (4)
2-1490
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