Manitowoc MLC650 Service Maintenance Manual

Reference Only
Manitowoc Published 09-09-16, Control # 229-09 3-1
MLC650 SERVICE/MAINTENANCE MANUAL ELECTRICAL SYSTEM
3
SECTION 3
ELECTRICAL SYSTEM
ELECTRICAL DRAWINGS AND
SCHEMATICS
Electrical schematics are located at the end of this section.
ELECTRICAL POWER SEQUENCE
Battery Power
Power for the crane’s electrical system is provided by two
12-volt batteries connected in series to produce 24 volts.
The following devices are connected to the battery positive
terminal at all times:
• Alternator (via 150 A alternator fuse or circuit breaker)
- Alternator fuse (F0)—Tier 4
- Alternator circuit breaker (CB0)—Tier 3
• Remote battery positive terminal
• Left and right starter solenoids
• Battery disconnect switch
• CraneStar® TCU (via fuse F5)
Battery Power Disconnect
When in the OFF position (contacts open), the battery
disconnect switch S1 disconnects the battery positive
terminal from the crane’s electrical systems. The switch is
turned to the OFF position for the following situations:
• Whenever the electrical system is being serviced.
• During extended downtime to help save battery life.
• For security reasons.
The battery disconnect switch must be in the ON (contacts
closed) position for machine operation. When the switch is
closed, battery power becomes available to the following
circuits and devices, via the main circuit breaker CB61:
• Engine run switch S3 (via CB6)
• Relay K3 and external run switch S33 (via CB4)
• Relays K4 and K6 (normally open contacts)
• Relay K5 (via CB8)
• Display modules (via CB4)
• Horn, dome light, and service lights switches (via CB5)
• Radio clock and preset memory (via CB5)
• Boom top warning light switch (via CB6)
• Setup remote battery charger (via CB4)
• Diesel heater (via CB9)
• Tier 4 engine sensors (via CB2)

Manitowoc MLC650 Specifications

General

Brand	Manitowoc
Model	MLC650
Category	Construction Equipment
Language	English