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Page Title:
LOSS OF HOOK ARM LOAD HOLDING. (Cont) |
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 TM 9-2320-364-34-1
High pressure hydraulics [oil under
3675 psi (25,339 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.
Do not get under LHS when disconnecting or
connecting connectors or hoses. A hydraulic
malfunction could cause LHS to lower causing
serious injury.
FLOWMETER TEST
(1) Disconnect hose 2917 male quick
disconnect from LHS control box
female quick disconnect.
(2) Disconnect hose 2882 from middle
frame bulkhead.
(3) Connect adapter hose to hose 2882.
(4) Connect adapter hose to middle
frame bulkhead.
(5) Connect flowmeter IN port to
adapter hose connected to
hose 2882.
(6) Connect flowmeter OUT port to
adapter hose connected to middle
frame bulkhead.
(7) Completely open flowmeter load
valve.
(8) Connect quick disconnect hose
2917.
(9) Start engine (TM 9-2320-364-10).
(10) Set hydraulic selector switch to
MAN HA position.
(11) With the aid of an assistant, observe
flowmeter while holding joystick in
LOAD position.
(a) If more than 0 gpm (0 lpm) are
present, perform Steps (12)
through (20) below and replace
RH hook arm cylinder
(Para 17-12).
(b) If 0 gpm (0 lpm) are present,
cylinder is OK. Perform
Steps (12) through (20) below
and go to Step 7 of this Fault.
(12) Set hydraulic selector switch to OFF
position.
(13) Turn OFF ENGINE switch.
(14) Disconnect hose 2917 male quick
disconnect from LHS control box
female quick disconnect.
(15) Disconnect flowmeter from two
adapter hoses.
(16) Disconnect adapter hose from
middle frame bulkhead.
(18) Disconnect adapter hose from
hose 2882.
(19) Connect hose 2882 to middle
frame bulkhead.
(20) Connect quick disconnect hose
2917.
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