Manitowoc MLC100-1 Service And Maintenance Manual

Manitowoc Published 10-09-2020, Control # 259-06 10-1
MLC80A-1/MLC90A-1/MLC100A-1/MLC100-1 SERVICE/MAINTENANCE MANUAL ACCESSORIES
10
SECTION 10
ACCESSORIES
This section provides operational information for the crane’s
accessory hydraulic systems.
Additional component information for this system can be
found in the following sections of this Service Manual:
• Section 2: Hydraulics
• Section 3: Electrical
NOTE: In the following instructions, CCS stands for Crane
Control System.
COUNTERWEIGHT PINS
See Figure 10-1 and Figure 10-2
Counterweight Pins Overview
The counterweight pins are controlled by a switch on the
remote control. The system consists of the accessory pump,
a 2-position, solenoid operated control valve, and a double-
acting hydraulic cylinder.
The setup remote control communicates with the
counterweight pins solenoid valve via the CCS.
To activate the setup remote, it must be turned in crane’s
main display. See the Main Display Operation Manual
provided with the crane.
The counterweight pins switch on the remote control is a 2-
position momentary switch. The switch must be unlocked
and held in the disengage position. The switch spring returns
to the engage position when released.
Engage (extend)
When the counterweight pins switch is released to the
engage position, the following occurs:
• The solenoid on the counterweight pins control valve is
deenergized.
• A spring shifts the control valve to the engage position.
• Hydraulic oil from the accessory pump is routed to the
barrel end of the counterweight pin cylinders.
• The counterweight pin cylinder rods extend to engage
the counterweight pins.
• The oil from the rod end of the cylinders flows back to
tank via the low pressure accessory valve.
Disengage (retract)
When the counterweight pins switch is held in the disengage,
the following occurs:
• The solenoid on the counterweight pins control valve is
energized by 24 V
DC
from the CCS.
• The solenoid shifts the control valve to the disengage
position.
• Hydraulic oil from the accessory pump is routed to the
rod end of the counterweight pin cylinders.
• The counterweight pin cylinder rods retract to disengage
the counterweight pins.
The oil from the barrel end of the cylinders flows back to tank
via the low pressure accessory valve.
Counterweight Limit Switch
The counterweight limit switch stops the boom hoist and the
gantry from raising the crane counterweights too high during
counterweight installation.
FOR REFERENCE
ONLY

Manitowoc MLC100-1 Specifications

General

Brand	Manitowoc
Model	MLC100-1
Category	Construction Equipment
Language	English