Manitowoc MLC300 Service And Maintenance Manual

Reference Only
UNDERCARRIAGE MLC300 SERVICE/MAINTENANCE MANUAL
8-12
Published 11-22-17, Control # 257-02
CRAWLER PINS
See Figure 8-6 and Figure 8-7 for the following descriptions.
The crawler pins are controlled by the setup remote.
Setup Remote Control
The setup remote control communicates with the CCM-10
control module via the controller area network bus (CAN
Bus). The crane control modules use the CAN Bus to
communicate with each other.
To operate the setup remote, it must be turned on as
instructed in the MLC300 Operator Manual.
Neutral
When the setup remote is not transmitting:
• Pump 3 hydraulic flow through system B (right valve
assembly) decreases.
• The isolation valve B shifts to neutral to block pump flow
to the crawler pin puller solenoid valves.
• The crawler pin puller solenoid valves shift to neutral to
block pump flow to the crawler pin pullers.
Disengage (retract pins)
When a disengage (retract pins) command is initiated by the
setup remote, the setup remote receiver communicates the
retract command to the CCM-10 and IOC30 control modules
via CAN Bus C. The following then occurs:
• The CCM-10 control module increases the pulse-width
modulation (PWM) current to pump 3 to increase system
B hydraulic flow.
• The IOLC30 control module sends 24 V
DC
to the side A
solenoid on the system B isolation valve, energizing the
solenoid. The valve spool shifts to a position that routes
hydraulic fluid to the crawler pin puller solenoid valves.
• The CCM-10 control module relays the retract command
to the CCMB11 control module via CAN Bus B. The
CCMB11 control module then sends 24 V
DC
to the
corresponding solenoid on the selected crawler pin
puller valve, energizing the solenoid. The valve spool
shifts to a position that routes hydraulic fluid to the rod
end of the pin puller cylinder.
• As hydraulic fluid flows into the rod end of the pin puller
cylinder, the rod retracts to disengage the corresponding
crawler pin. This action forces hydraulic fluid out the
barrel end of the pin puller cylinder and back to the tank.
Engage (extend pins)
When an engage (extend pins) command is initiated by the
setup remote, the setup remote receiver communicates the
extend command to the CCM-10 and IOC30 control modules
via CAN Bus C. The following then occurs:
• The CCM-10 control module increases the PWM current
to pump 3 to increase system B hydraulic flow.
• The IOLC30 control module sends 24 V
DC
to the side A
solenoid on the system B isolation valve, energizing the
solenoid. The valve spool shifts to a position that routes
hydraulic fluid to the crawler pin puller solenoid valves.
• The CCM-10 control module relays the extend
command to the CCMB11 control module via CAN
Bus B. The CCMB11 control module then sends 24 V
DC
to the corresponding solenoid on the selected crawler
pin puller valve, energizing the solenoid. The valve spool
shifts to a position that routes hydraulic fluid to the barrel
end of the pin puller cylinder.
• As hydraulic fluid flows into the barrel end of the pin
puller cylinder, the rod extends to engage the
corresponding crawler pin. This action forces hydraulic
fluid out the rod end of the pin puller cylinder and back to
the tank.

Manitowoc MLC300 Specifications

General

Brand	Manitowoc
Model	MLC300
Category	Construction Equipment
Language	English