BOOM DOES NOT RAISE OR RAISES SLOWLY. (Cont) -726250677

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) Disconnect adapter hoses from

elbows. Discard preformed

packings.

(2) Install crane hose with preformed

packing on inboard (shorter) elbow.

(3) Connect flowmeter OUT port

adapter hose with preformed

packing to the crane hose removed

from outboard (taller) elbow.

(4) Connect flowmeter IN port adapter

hose with preformed packing to

outboard (taller) elbow.

(5) Start engine.

(6) Set WINCH/CRANE switch to

CRANE position.

(7) Set hydraulic selector switch to

CRANE/SRW position.

(8) Set crane POWER switch to

ON position.

(9) Extend boom lift cylinders

completely if boom raise slowly.

(10) Hold BOOM control lever in the UP

position.

(a) If more than 0 gpm (0 lpm)

are present, perform Steps (11)

through (13) below and go to

Step 5 of this Fault.

(b) If 0 gpm (0 lpm) are present,

perform Steps (11) through (15)

below and go to Step 3 of this

Fault.

(11) Set crane POWER switch to

OFF position.

(12) Set hydraulics selector switch to

OFF position.

(13) Turn OFF ENGINE switch.

(14) Disconnect adapter hoses from

elbow and crane hose. Discard

preformed packings.

(15) Connect crane hoses with

preformed packing to elbow.

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