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TM 5-2420-222-20-3
QUICK COUPLER-TO-BOOM OIL LINES (SERIAL NUMBERS 319995 THRU 342573 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.
Tube (1)
Hose (2)
a. Place drain pan underneath.
b. Using two 1 1/4-inch open-end
wrenches, unscrew and take off.
c. Tag (page 2-137).
d. Cap tube (1) (page 2-137).
2.
Guard (3), two
Two screws (6),
a. Using 9/16-inch, 3/8-inch drive socket
clamps (4), and
washers (7), and
and ratchet handle, unscrew and take
dipperstick (5)
lockwashers (8)
out.
b. Get rid of lockwashers (8).
3.
Two tubes (9 and 10)
Guard (3) and
Take off.
and dipperstick (5)
two clamps (4)
4
Dipperstick (5)
Hose (2) and
a. Take off.
tube (9) with
b. Allow fluid to drain into drain pan.
assembled parts
c. Get rid of drained fluid (page 2-137).
DISASSEMBLY
NOTE
Female quick coupler is sealed with a plug. Nipple quick coupler is sealed with a cap.
Both quick couplers are disassembled the same way.
5.
Hose (2)
Tube (9)
a. Using 1 1/8-inch and 1 1/4-inch open-
end wrenches, unscrew and take out.
b. Tag (page 2-137).
6.
Quick coupler
Plug (13) or
Pull out.
(11 or 12)
cap (14)
On female quick couplers, it may be
necessary to pull up on locking
collar.
2-1478
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