being done. The engine can stall under the load if the engine speed is too
slow.
handle. The location of the boom control handle can vary depending
on crane configuration. See Drum and Control Handle Identification
Boom Control Handle:
See Boom Hoist Operation on page 3-66
.
The location of the boom control handle can vary depending on crane
configuration. See Drum and Control Handle Identification on page 3-56
.
• Move the control handle BACK to RAISE the boom. The boom hoist brake
releases and speed changes in relation to control handle movement.
• Release the control handle to CENTER to STOP the boom. Speed decreases
to off and the boom hoist brake applies to hold the boom in position.
• Move the control handle FORWARD to LOWER the boom. The boom hoist
brake releases and speed changes in relation to the control handle
movement.
Swing Control Handle:
See Swing Operation on page 3-68
.
• Move the control handle to the LEFT to SWING LEFT.
• Release the control handle to CENTER to STOP swinging. Swing speed
decreases and the rotating bed slows to a stop. Move the control handle in the
opposite direction to stop the swing motion faster.
• Move the control handle to the RIGHT to SWING RIGHT.
The swing and travel alarm beeps to warn personnel when the crane is swung.
Item Description
5A
Drum rotation indicator—a pin-type actuator in the top of the control
handle moves up and down to signal the operator by feel that the
drum is turning.
5B
Swing holding brake switch—holds the rotating bed in position for
short periods of time. The swing control handle is not operable
while the swing holding brake switch is pressed.
• PRESS the switch to APPLY the swing holding brake.
• RELEASE the switch to RELEASE the swing holding brake.