Manitowoc Published 07-19-16, Control # 249-01 1-31
2250 SERVICE/MAINTENANCE MANUAL INTRODUCTION
• In Clamshell mode, two load drums (holding and
closing) are operated at the same time and are
controlled with one load drum control handle. The
power-down and closing features are turned ON. The
PC controls the pump’s electrical displacement controls
(EDC) and engages the clutches in UP and DOWN
operations. The PC also controls the load drum brake
application. Contact the Manitowoc Crane Care Lattice
Team for information on Clamshell modes.
• In MAX-ER mode, the program allows operation of the
crane and MAX-ER attachment as one system.
Electrical Power to Operator’s Cab
See Figure 1-16 for the following.
Battery power is available at all times to operate the dome
light switch, horn switch, alternator, accessory outlet, and
PC.
When the Engine RUN/STOP/RUN key switch is placed in
the RUN position, voltage is available at the key-operated
Engine Start switch and other cab controls.
Contacts of the start switch and remote RUN/STOP switches
must be enabled to start the engine. When both switches are
enabled, voltage is available to the following:
• Starter solenoid relays MS1 and MS2
• Engine hour meter
• Fan motor relay
• Ignition relay
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