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FAN SPEED DOES NOT DECREASE FROM HIGH TO LOW SPEED. (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.
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.
NOTE
Use drain pan to catch leaking hydraulic oil.
Only remove center screw on engine side of
LHS control box cover.
VISUAL INSPECTION
(1)
Remove eight screws, lockwashers,
washers and left side noise
panel. Discard lockwashers.
(2) Remove four screws, lockwashers
and LHS control box cover.
Discard lockwashers.
(3) Loosen screw and disconnect
solenoid connector.
(4) Remove nut and solenoid.
(5) Remove high speed fan lockout
solenoid valve from multifunction
manifold.
(6) Remove and discard two preformed
packings and packing retainers.
(7) Push plunger inside valve with a
non-metallic probe.
(a) If plunger sticks or does not
move freely up and down,
replace solenoid valve
(Para 17-18).
(b) If plunger moves freely up and
down, solenoid valve is OK.
(8) Lubricate two preformed packings
and packing retainers with hydraulic
oil and install on solenoid valve.
(9) Install high speed fan lockout
solenoid valve.
(10) Install solenoid and nut.
(11) Connect solenoid connector.
(12) Tighten connector screw and coat
head of connector screw with
sealing compound.
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