Manitowoc 14000 Service Maintenance Manual

Reference Only
INTRODUCTION 14000 SERVICE MANUAL
1-58
Published 09-05-14, Control # 226-02
Boom Hinge Pins
See Figures 1-29 and 1-32.
During normal operation boom hinge pins solenoid valve is
disabled where boom hinge pins are extended with keeper
plate holding hinge pins in place. Rod end port of cylinder is
open to tank. Boom hinge pins switch is on overhead
console in cab. Boom hinge pins can not be disengaged until
keeper plate and pin from cylinder is removed. Accessory
system pressure sender monitors accessory system
pressure.
When boom hinge pins switch is placed in engage position,
an input voltage is sent to node 1 controller. Node 3
controller sends a 24 volt output to enable boom hinge pins
solenoid HS-27 and shifts valve to engage (normal) position.
Node 4 controller sends a variable 0 to 24 volt output to
enable low-pressure side of drum 1 pump EDC.
Hydraulic fluid pressure at approximately 600 psi (41 bar)
flows to boom hinge pins upper accessory valve. Hydraulic
fluid leaves the accessory valve and enters piston end of
boom pin cylinder, extending cylinder rod to engage 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, valve returns to
normal position. Node 4 controller sends a zero output signal
to disable low-pressure side of drum 1 pump.
When boom hinge pins switch is placed in disengage
position and held, an input voltage is sent to node 1
controller. Node 3 controller sends a 24 volt output to enable
boom hinge pins solenoid HS-27 and shifts valve to
disengage position. Node 4 controller sends a variable 0 to
24 enable low-pressure side of drum 1 pump EDC.
Hydraulic fluid pressure at approximately 600 psi (41 bar)
flows to boom hinge pins upper accessory valve. Hydraulic
fluid leaves the accessory valve and enters rod end of boom
pin cylinder, retracting cylinder rod to disengage 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, valve returns to
engaged (normal) position.

Manitowoc 14000 Specifications

General

Brand	Manitowoc
Model	14000
Category	Construction Equipment
Language	English