OPERATING CONTROLS AND PROCEDURES MLC90A-1/MLC100-1 OPERATOR MANUAL
3-30
Published 12-10-19, Control # 258-05
6 Sync Switch
This switch allows the gantry raising cylinders to extend and retract
automatically in conjunction with the boom hoist when using the Drum 4 (boom
hoist) thumb-wheel control (item 5 on remote control).
• Push RIGHT to SYNC (synchronize) operation of the gantry cylinders and the
boom hoist.
Use this position for counterweight installation and removal. This will allow
the gantry cylinders to follow along with the gantry as the boom hoist controls
gantry raising and lowering.
• Push LEFT to turn OFF SYNC. The gantry raising cylinders and the boom
hoist are controlled independently of each other.
Use this position for all other operations.
Refer to Section 4 of the Operator Manual for detailed instructions on:
• Gantry raising and lowering
• Counterweight Installation and removal
7
Drum 4 (boom hoist) Thumb-
Wheel Control
• Rotate UP to PAY OUT Drum 4 wire rope. Speed is in relation to control
movement.
• RELEASE to center to STOP Drum 4. The drum brake applies to stop and
hold the drum in position.
• Rotate DOWN to HAUL IN Drum 4 wire rope. Speed is in relation to control
movement.
8 Counterweight Pins Switch
• Pull OUT to UNLOCK the switch.
• Push UP and hold to DISENGAGE the counterweight pins.
• RELEASE (spring returns down) to ENGAGE the counterweight pins and
lock the switch.
Table 3-11. Identification and Operation of Remote Controls
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