Manitowoc 2250 Service And Maintenance Manual

Reference Only
INTRODUCTION 2250 SERVICE/MAINTENANCE MANUAL
1-60
Published 11-06-15, Control # 040-13
Adapter Frame Pin Cylinders
See Figure 1-33 and Figure 1-35 for the following procedure.
The operating description is for front adapter frame
connecting pins. Operation of rear pins is the same, except
different switches are used.
Power is available to jacking remote control when the cable
is connected at auxiliary valve junction box on right side of
rotating bed and engine is running.
Adapter Frame Pins Engage
When power button is pressed and front adapter frame pin
switch is held in the up engage position, an input voltage is
sent through a diode to the PC. The PC sends a 12 volt
output signal to the to auxiliary system disable relief valve
HS-12 that adjust system pressure to 3,500 psi (241 bar).
The PC also sends a 12 volt output signal to enable front
adapter frame pins engage solenoid HS-21. Hydraulic pilot
pressure at 350 psi (24 bar) or 300 psi (21 bar) shifts the
valve in the selected direction.
Hydraulic fluid exits the valve sections of upper accessory
valve and flows to front left and right frame connecting pin
cylinders piston end, extending pins to connect front of
rotating bed with adapter frame. Fluid from rod end of pin
cylinders flows back through upper accessory valve to tank.
When power button or front adapter frame pins switch is
moved to off position, the PC sends a 0 volt output to shift
spool of solenoid valve HS-21 to center position.
Adapter Frame Pins Disengage
When power button is pressed and front adapter frame pin
switch is held in the down disengage position, an input
voltage is sent through a diode to the PC. The PC sends a 12
volt output signal to the auxiliary system disable relief valve
HS-12 that adjust system pressure to 3,500 psi (241 bar).
The PC also sends a 12 volt output signal to enable front
adapter frame pins disengage solenoid HS-22. Hydraulic
pilot pressure at 350 psi (24 bar) or 300 psi (21 bar) shifts the
valve in the selected direction.
Hydraulic fluid exits the valve sections of upper accessory
valve and flows to front left and right frame pin cylinders rod
end, retracting pins to disconnect front of rotating bed with
adapter frame. Fluid from piston end of pin cylinders flows
back through upper accessory valve to tank.
When power button or front adapter frame pins switch is
moved to off position, the PC sends a 0 volt output to shift
spool of solenoid valve HS-22 to center position.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English