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Page Title:
LOSS OF HOOK ARM SAFE LOWERING. (Cont) |
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 TM 9-2320-364-34-1
Adhesives, solvents, and sealing compounds
can burn easily, can give off harmful vapors,
and are harmful to skin and clothing. To avoid
injury or death, keep away from open fire and
use in well-ventilated area. If adhesives, solvent,
or sealing compound gets on skin or clothing,
wash immediately with soap and water.
Do not get under LHS when disconnecting or
connecting connectors and hoses. A hydraulic
malfunction could cause LHS to lower causing
serious injury or death.
Do not scratch surface of cylinder rod. Damage
to cylinder seals could result causing cylinder
failure.
VISUAL INSPECTION
(1) Loosen connector screw and
disconnect connector from safe lowering
solenoid valve in port VB on LH
hook arm manifold.
(2) Remove safe lowering solenoid
valve and preformed packing from
LH hook arm manifold. Discard
preformed packing.
(3) Attempt to push poppet into valve
toward solenoid coil.
(a) If poppet does not move,
replace safe lowering solenoid
valve (Para 17-13). Perform
Step (12) below and go to
Step 7 of this Fault.
(b) If poppet moves, perform Steps
(4) through (6) below.
(4) Connect connector to removed safe
lowering solenoid valve and tighten
connector screw.
(5) Turn ON ENGINE switch
(TM 9-2320-364-10).
(6) With the aid of an assistant, hold in
safe lowering button and observe
the poppet valve.
(a) If poppet does not move, turn
OFF ENGINE switch and replace
the solenoid coil (Para 17-13).
Perform Steps (7) through (12)
below and go to Step 7 of this
Fault.
(b) If poppet moves, fault not
corrected. Perform Steps (7)
through (12) below and notify
supervisor.
(7) Turn OFF ENGINE switch.
(8) Loosen connector screw and
disconnect connector from removed
safe lowering solenoid valves.
(9) Install safe lowering solenoid valve
and preformed packing in port VB
on LH hook arm manifold.
(10) Connect connector to safe
lowering solenoid valve.
(11) Tighten connector screw and coat
head of connector screw with
sealing compound.
(12) Remove two wooden blocks from
hook arm.
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