TM 9-2320-272-10
1-21.
HYDRAULIC SYSTEM OPERATION (Contd)
F
TRANSFER CASE POWER TAKEOFF (PTO) CONTROL - A manually operated control lever located inside the
cab that permits engagement or disengagement of the Power Takeoff (PTO).
G
TRANSFER CASE POWER TAKEOFF (PTO) - Uses driving power of the transfer case to provide mechanical
driving power for the hydraulic pump.
H
POWER TAKEOFF (PTO) DRIVE SHAFT - Transmits mechanical driving power from PTO to the hydraulic pump.
I
HYDRAULIC PUMP - Draws oil from hydraulic oil reservoir and directs it to the rear winch control valve and winch
drive motor.
J
OIL FILTER - Filters used or bypassed oil from the control valve before it returns to the hydraulic oil reservoir.
K
HYDRAULIC OIL RESERVOIR - Storage tank for hydraulic oil.
L
TORQUE CONTROL LEVER - Controls the operating gear ratio of the winch drive motor. Lever is pulled outward
to HIGH for heavy loads or pushed inward to LOW for light loads.
M
WINCH DIRECTIONAL CONTROL LEVER - Manually-operated lever that controls the WIND and UNWIND
direction of the rear winch drum. Lever does this by opening and closing the directional control valve to the winch motor,
and reversing the direction of pressurized hydraulic fluid. Lever is pushed inward to wind and pulled outward to unwind
winch cable.
N
DIRECTIONAL CONTROL VALVE - Receives pressurized hydraulic oil from the hydraulic pump and directs it to
the winch motor. The flow of the hydraulic oil to and from this control valve provides forward or reverse driving power to
the winch motor. Valve also returns used oil back to the hydraulic oil reservoir from the winch.
O
TORQUE CONTROL VALVE - Hydraulically controls the hydraulic oil pressure to engage rear winch drum clutch
in HIGH or LOW gear range.
P
WINCH MOTOR - Converts hydraulic power back into mechanical power needed to turn the rear winch drum.
Q
CONTROL LINKAGE - Connects transfer case power takeoff control to transfer case power takeoff.
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