Manitowoc 18000 Service Maintenance Manual

Reference Only
INTRODUCTION 18000 SERIVCE/MAINTENANCE MANUAL
1-68
Published 12-05-17, Control # 035-23
Boom Hinge Pins
See Figures 1-39 and 1-41 for the following procedure.
During normal operation the boom hinge pins 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. The boom hinge pins cannot be
engaged/disengaged until hydraulic line are connected
between crane and boom butt and keeper plates from pins
are removed.
When boom hinge pins switch is placed in the engage
position and held, an input voltage is sent to node-1
controller. Node-4 controller sends a 24 volt output to enable
boom hinge pins solenoid valve HS-25 and shifts valve to the
engage 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 boom hinge pins accessory valve. Hydraulic fluid
leaves the accessory valve and enters rod end of boom pin
cylinder, retracting cylinder rod to engage the boom hinge
pins. Hydraulic fluid from piston end of boom pin cylinder
leaves accessory system valve and returns to tank. When
boom hinge pins switch is released, solenoid valve HS-25
returns to center position.
When boom hinge pins switch is placed in the disengage
position and held an input voltage is sent to node-1
controller. Node-4 controller sends a 24 volt output to enable
boom hinge pins solenoid valve HS-26 and shifts valve to the
disengage 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 boom hinge pins accessory valve. Hydraulic fluid
leaves the accessory valve and enters piston end of boom
pin cylinder, extending cylinder rod to disengage the boom
hinge pins. Hydraulic fluid from rod end of boom pin cylinder
leaves accessory system valve and returns to tank. When
boom hinge pins switch is released, solenoid valve HS-26
returns to center position.

Manitowoc 18000 Specifications

General

Brand	Manitowoc
Model	18000
Category	Construction Equipment
Language	English