Manitowoc 2250 Service Maintenance Manual

Reference Only
Manitowoc Published 07-19-16, Control # 249-01 1-21
2250 SERVICE/MAINTENANCE MANUAL INTRODUCTION
1
CRANE DESCRIPTION OF OPERATION
General Operation
See Figure 1-9 for the following.
The model 2250 is powered with the Cummins QSX15
engine. Standard and optional equipment available for the
crane is included. Disregard any equipment the crane does
not have. See the MAX-ER
®
2000 Operator Manual for
information on the MAX-ER 2000. See MAX-ER 2000
Description of Operation.
The Model 2250 operating system is an electronically-
processed independent controls (EPIC) system. Through the
programmable controller (PC) the independently powered
pumps, motors, and cylinders provide controller-driven
control logic, pump control, motor control, on-board
diagnostics, and service information. Crane information is
displayed on a digital display screen in operator’s cab.
A single diesel engine provides power to operate the system
pumps through a pump drive transmission. In a closed-loop
hydraulic system, high-pressure hydraulic fluid from the
system pump drives a hydraulic motor. Pressure develops
within the closed-loop system while resistance to movement
of the load on the motor is overcome. When movement
begins, the pump’s volume displacement maintains motor
speed. The spent hydraulic fluid from the motor outlet returns
directly to the pump’s input. The crane’s closed-loop systems
are swing, right travel, left travel, boom hoist, load drums,
and luffing jib hoist.
Command
Signal
Pilot
Control
Pressure
PCP
EDC
Line Legend (for all schematics)
Case Return Pressure Hydraulic
Control or Pilot Pressure Hydraulic, Regulated Air
Low-Pressure Hydraulic, Signal Electrical, Exhausted Air
Negative Electrical (ground)
High-Pressure Hydraulic, Positive Electrical, Manifold Air
Position
Swashplate
High-Pressure Side
Motor
Hydraulic
Pump
Hydraulic
Drum
Controller (PC)
Manifold
Suction
Pump
Charge
Low-Pressure Side
Feedback
Feedback
Pressure
(motor stroke)
Control Signal
(pump stroke)
Control Signal
Control
Displacement
Electronic
Handle
Control
Piping
Hydraulic
Programmable
Handle
RF-01
Hydraulic Suction Manifold Line
Not Active Line or Circuit
Speed Sensor
FIGURE 1-9

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English