BOOM CREEPS DOWN. (Cont) -726250719

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) Set crane POWER switch to

OFF position (TM 9-2320-364-10).

(2) Set hydraulic selector switch to OFF

position.

(3) Turn OFF ENGINE switch.

(4) Disconnect flowmeter OUT port

adapter hose from crane hose.

Discard preformed packing.

(5) Install plug with preformed packing

in crane hose.

(6) Tag, mark and disconnect three

hoses from boom lift cylinder on

side of boom without OSS box.

Discard preformed packings.

(7) Install plugs with preformed

packings on disconnected hoses.

(8) Install caps with preformed packings

on two cylinder fittings closest to

four valve bank.

(9) Connect adapter hose with

preformed packing to remaining

fitting on boom lift cylinder.

(10) Start engine.

(11) Set WINCH/CRANE switch to

CRANE position.

(12) Set hydraulic selector switch to

CRANE/SRW position.

(13) Set crane POWER switch to

ON position.

(14) Hook hoist block on ring and take

out slack in cable to prevent boom

from raising.

(15) Hold BOOM lever in UP position.

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

measured, perform Steps (16)

through (23) below and replace

boom lift cylinder (Para 16-6) on

LHS side of boom.

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

perform Steps (16) through (23)

below and replace boom

cylinder (Para 16-6) on cab side

of boom.

Continued on next page.

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