Section 1
1 - 31
Sequence of Operation, High-Performance Winch -
FREESPOOL
The operator depresses the FREESPOOL switch. Elec-
tronic circuitry also enables the BRAKE-OFF switch, and
all modes of BRAKE-OFF are active during FREESPOOL
mode. This allows the operator to achieve FREESPOOL
mode when the gear train is loaded by fi rst operating in
BRAKE-OFF to relieve load on the gear train. Pilot con-
trol pressure communicates in the logic control manifold
to release the brake, open the BRAKE-OFF valve, and
shift the hydraulic motor to HI-SPEED displacement. Pilot
control oil fl ow also saturates the inlet B port of the motor.
Pilot control pressure communicates to the FREESPOOL
shifter fork, allowing the dental clutch to disengage the
drum pinion gear from the intermediate gear. The gear
train is disengaged from the drum gear so wire rope can
be pulled from the drum by hand.
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