Manitowoc 14000 Service Maintenance Manual

Reference Only
INTRODUCTION 14000 SERVICE MANUAL
1-66
Published 09-05-14, Control # 226-02
Crawler Pin Cylinders
Left and right crawler pin pusher cylinder operation is
controlled with hydraulic valve handles on carbody and
computer programming. The following description of
operation is for right side crawler pin pusher cylinder.
Operation of both pin cylinders is the same.
Crawler Pin Cylinders Extend
See Figure 1-36.
Move right crawler pin lever back to extend crawler pin
pusher cylinder into crawler track frame. This shifts selected
lower accessory valve to block charge pressure to carbody
pressure sender. System pressure bleeds out through orifice
and system pressure drops, sending an input signal to
node 1 controller.
Node 4 controller sends a variable 28 output voltage to drum
1 pump EDC that tilts pump swashplate to stroke pump in
low-pressure side direction. Hydraulic fluid flows through
upper accessory system valve to lower accessory valve
where system pressure approximately 3,100 psi (215 bar).
Hydraulic fluid enters piston end of crawler pin pusher
cylinders extending cylinder rod, rotating assembly lever to
secure crawler frame to carbody. Hydraulic fluid exhausting
from rod end of crawler pin pusher cylinder returns to lower
accessory valve and is returned to tank.
When control lever is moved back to neutral position, system
pressure beyond lower accessory valve increases, an input
signal to the node 1 controller. Node 4 controller sends a
zero output voltage to drum 1 pump EDC that returns pump
swashplate to neutral and de-strokes the pump.

Manitowoc 14000 Specifications

General

Brand	Manitowoc
Model	14000
Category	Construction Equipment
Language	English