Manitowoc 2250 Service And Maintenance Manual

Reference Only
INTRODUCTION 2250 SERVICE/MAINTENANCE MANUAL
1-36
Published 11-06-15, Control # 040-13
Pressure Senders and Speed Sensors
See Figure 1-18 for the following procedure.
Pressure senders monitor drum system pressures, load
drum charge pressure, right/left travel system pressure,
swing right/left system pressure. The PC receives input
hydraulic pressure information from each system pressure
sender. Pressure senders provide information on the
required load holding pressure for load drums, boom hoist
drum, or luffing hoist drum.
Drum speed sensors on drum shafts or flanges detect speed
and direction of drum movement. The PC receives this
information as two out-of-phase square wave voltages that
are converted to “counts”. The PC compares control handle
voltage with pump output to determine when to vary pump
stroke.
Limit Switches and Faults
See Figure 1-19 for the following procedure.
When operating, all limit switches are closed, sending an
input voltage to the PC. If a limit switch is tripped, the PC
sends a 0 volt output to system pump EDC and brake
solenoid. System pump de-strokes and system brake
solenoid valve shifts to apply brake. Move component in the
opposite direction away from limit to correct the problem.
The limit bypass switch allows crane to be operated beyond
the limits for crane setup or maintenance only. For example,
to add wire rope on load drum or to remove wire rope from
load drum after an operating limit is enabled. The jib up limit
bypass switch allows the jib maximum up limit to be
bypassed when boom or luffing jib is lowered to ground.
Hydraulic Brake Systems
Travel, swing, boom hoist, and luffing jib hoist brakes are
spring set and hydraulically released. The operator enables
brake operation by placing selected brake switch in off
position. The PC releases swing brake and swing lock
immediately when swing brake switch is placed in off position
(Past Production). The PC controls release of other brakes
with control handle movement.
LOW AIR SWITCH
WB-20
WD-20
WD-19
8D8
WD-11
WB-24
SELECT
CONFIRM
CRANE MODE
8T
8
0
5A
0
8
WB-26
WB-33DOWN SCROLL
UP SCROLL
WA-26
WA-28
WA-23
WA-27
WA-24
WA-22
WA-19
WA-25
K1
RF-10
F10
WE-02
WE-01
8E
0
FRONT
(DRUM 1)
SPEED
SENDER
F
A
B
D
F12
PRESSURE SENDER
SWING LEFT
PRESSURE SENDER
SWING RIGHT
PRESSURE SENDER
LEFT TRAVEL
PRESSURE SENDER
RIGHT TRAVEL
PRESSURE SENDER
BOOM HOIST
PRESSURE SENDER
LOAD DRUM SYSTEM
PRESSURE SENDER
LOAD DRUM CHARGE
PRESSURE SENDER
LUFFING HOIST
8E
8
F11
SYSTEM FAULT
ALARM
WC-35
WC-34
OPERATING LIMIT
LIGHT
ALARM
LIGHT
WE-04
WE-03
8E
0
RIGHT REAR
(DRUM 2)
SPEED
SENDER
F
A
B
D
WE-06
WE-05
8E
0
LEFT REAR
(DRUM 3)
SPEED
SENDER
F
A
B
D
WD-06
WD-05
8E
0
BOOM HOIST
SPEED
SENDER
F
A
B
D
WD-02
WD-01
8E
0
LUFFING JIB
SPEED
SENDER
F
A
B
D
D
(DRUM 4)
(DRUM 5)
PROGRAMMABLE
CONTROLLER
HYD VACUUM SWITCH
WA-31
DIGITAL DISPLAY
5A
5A
5A
FIGURE 1-18

Manitowoc 2250 Specifications

General

Brand	Manitowoc
Model	2250
Category	Construction Equipment
Language	English