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Page Title: BOOM DOES NOT RAISE OR RAISES SLOWLY. (Cont)
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TM 9-2320-364-34-1
High pressure hydraulics [oil under 3000 psi (20,685 kPa) pressure] operate this equipment. Refer to
vehicle operator and maintenance manuals for hydraulic oil pressure. Never disconnect any hydraulic
line or fitting without first dropping pressure to zero. Failure to comply may result in injury to personnel.
Fuel and oil are slippery and can cause falls. To avoid injury, wipe up spilled fuel or oil with rags.
NOTE
Use a drain pan to catch leaking hydraulic oil.
FLOWMETER TEST
(1) Remove four nuts, lockwashers,
washers and screws and cover.
Discard lockwashers.
(2) Tag, mark and disconnect two
hoses from elbows at top of four
valve bank above BOOM valve.
Discard preformed packings.
(3) Connect adapter hose with
preformed packing to inboard
(smaller) elbow.
(4) Connect adapter hose to flowmeter
OUT port.
(5) Connect adapter hose with
preformed packing to outboard
(taller) elbow.
(6) Connect adapter hose to flowmeter
IN port.
(7) Open flowmeter load valve.
(8) Start engine (TM 9-2320-364-10).
(9) Set WINCH/CRANE switch to
CRANE position.
(10) Set hydraulic selector switch to
CRANE/SRW position.
(11) Set crane POWER switch to
ON position.
(12) Hold BOOM control lever in the UP
position.
(a)  If 6 gpm (23 lpm) or more
are not present, perform
Steps (13) through (18) below
and go to Step 4 of this Fault.
(b)  If 6 gpm (23 lpm) or more are
present, perform Steps (13)
through (15) below and go to
Step 2 of this Fault.
(13) Set crane POWER switch to
OFF position.
(14) Set hydraulics selector switch to
OFF position.
(15) Turn OFF ENGINE switch.
(16) Disconnect adapter hoses from
elbows. Discard preformed
packings.
(17) Lubricate preformed packings.
(18) Connect two hoses with preformed
packings to elbows.

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