Manitowoc 2250 Service And Maintenance Manual

Reference Only
Manitowoc Published 11-06-15, Control # 040-13 1-89
2250 SERVICE/MAINTENANCE MANUAL INTRODUCTION
1
Steering Arm Cylinders
See Figure 1-56 and Figure 1-57 for the following procedure.
Steering arms and stop pins must be properly positioned
depending on swing radius and type of crawler travel or
swing. See MAX-ER Assembly/Disassembly topic in Section
4 of Operator Manual for information on positioning steering
wheels.
Power is available to MAX-ER remote switch assembly when
power cable (W28) is plugged into receptacle at left side of
counterweight trailer and engine is running. When power
button on MAX-ER remote switch assembly is pressed,
power is enabled to operate steering switch. The switch is
spring-returned to OFF position.
Steering Cylinders Extend (Swing/Crab)
The steering pins must be disengaged first, before steering
arms can be positioned. Move the stop pins to desired
steering position. When steering switch is held in the UP
swing/crab position, an input signal is sent to the PC. A 12-
volt output signal from PC enables the steering solenoid
valve HS-42 to extend right side and left side steering arm
cylinders. Internal pilot supply pressure of 200 psi (14 bar)
enables selected spool to shift the steering arm extend
solenoid valve.
The crane PC sends an output signal to shift crane auxiliary
system disable valve HS-12, to block valve bypass.
Accessory system pressure increases to operate accessory
items. An in line relief valve set at 1,200 psi (83 bar) reduces
the auxiliary system pressure to steering arm cylinders.
Accessory system fluid enters MAX-ER accessory valve and
goes through steering solenoid valve to the piston end of
steering arm cylinders to extend cylinders and move steering
arms to swing or crab position.
Return fluid from rod end of steering arm cylinders pass
through MAX-ER accessory valve before returning to crane
hydraulic tank through return line. Release steering switch to
stop extending steering arms when stop is reached. When
the steering arms are positioned, the steering pins must be
engaged.
CAUTION
Machinery Damage!
Wheeled counterweight assembly must be supported on
jacks before changing wheel position:
• Check that strut and draw bar pins are in proper
positions. Hydraulic cylinders and other wheeled
counterweight trailer components may be damaged.
• Extend jacks to bear most of counterweight trailer
load until bulge is out of tires. Failure to do so may
cause tires to separate from rims as wheels are
positioned.

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English