Manitowoc 18000, Service Maintenance Manual, Page: 86 / 316

Reference
Only
INTRODUCTION 18000 SERIVCE/MAINTENANCE MANUAL
1-74
Published 12-05-17, Control # 035-23
Rigging Winch (Drum 7)
See Figures 1-39 and 1-44 for the following procedure.
The rigging winch (Drum 7) is located in the boom butt.
During normal operation the rigging winch solenoid valve is
“motor spooled” where both cylinder ports and tank port of
valve spool section are connected in center position.
Power is available to hand-held radio remote control when
setup remote mode is selected, engine is running, and power
button is pressed.
When rigging winch switch is placed in pay out position and
held, an input voltage is sent to node-1 controller. Node-4
controller sends a 24 volt output to enable rigging solenoid
valve HS-35 and shifts valve to the pay out position. Node-5
controller sends a variable zero to 24 volt output voltage to
enable accessory system proportional relief valve.
When an accessory valve spool shifts, supply flow to the
other accessory valves is limited. The accessory system
pressure sender monitors accessory system pressure.
Hydraulic fluid pressure at approximately 3,000 psi (204 bar)
flows to rigging winch accessory valve. Hydraulic fluid leaves
the accessory valve and enters pay out side of winch motor
to pay out wire rope at a fixed speed. Return hydraulic fluid
from motor leaves accessory system valve and returns to
tank. When rigging winch switch is released, solenoid valve
HS-35 returns to center position.
When rigging winch switch is placed in the haul in position
and held an input voltage is sent to node-1 controller. Node-4
controller sends a 24 volt output to enable rigging winch
solenoid valve HS-36 and shifts valve to the haul in position.
Node-5 controller sends a variable zero to 24 volt output
voltage to enable accessory system proportional relief valve.
Hydraulic fluid pressure at approximately 3,000 psi (204 bar)
flows to rigging winch accessory valve. Hydraulic fluid leaves
the accessory valve and enters haul in side of winch motor to
haul in wire rope at a fixed speed. Return hydraulic fluid from
motor leaves accessory system valve and returns to tank.
When rigging winch switch is released, solenoid valve HS-36
returns to center position.