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TM 5-2420-222-20-3
BOOM-TO-MANIFOLD HYDRAULIC IMPACTOR RETURN OIL LINE (SERIAL NUMBERS 235786 THRU 235999
ONLY) - CONTINUED
ACTION
LOCATION
ITEM
REMARKS
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.
1.Union 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.
Tag (page 2-137).
2.Manifold (3)
Union adapter (1)
a.
Using 1 1/4-inch open-end wrench,
with assembled
unscrew and take out.
packing (4)
b.
Plug manifold (3) (page 2-137).
3.Union adapter (1)
Packing (4)
a.
Using pocket knife, take off.
b.
Get rid of.
4.Clamp (5) and
Screw (7) and
a.
Using 9/16-inch, 1/2-inch drive
manifold block (6)
special nut (8)
socket, ratchet handle, and 9/16-inch
box wrench, unscrew and take apart.
b.
Get rid of special nut (8).
5.Hose (2), isolator
Clamp (5)
Take off.
(9), and manifold
block (6)
6.Manifold block (6)
Hose (2)
Take off.
7.Hose (10)
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.
Plug hose (10) (page 2-137).
d.
Tag hose (10) (page 2-137).
e.
Get rid of drained fluid (page 2-137).
2-1484
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