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Reference
Only
Manitowoc
Published 05-16-17, Control # 233-03
1-19
999 SERVICE/MAINTENANCE MANUAL
INTRODUCTION
1
When travel speed switch is in high position, travel motors
remain in minimum displacement (low torque, high-speed)
position when starting. When crawler begins to move, a high
system pressure shifts the PCOR spool placing travel motor
in maximum displacement (high torque, low speed) position
for breakaway torque. Travel motors shift back to minimum
displacement automatically if engine speed is above 1500
rpm and system pressure is below 3,915 psi (270 bar). If
engine is below 1500 rpm, 2-speed travel solenoid HS-12 is
enabled even if travel speed switch in the high position. Two-
speed travel solenoid HS-12 is disabled, shifting valve and
removing pilot charge pressure to end of P/C valve, allowing
motor to operate in PCOR mode.
Travel Detent Selector
Travel detent selector (12) on right travel handle locks-in any
travel command. This allows crawler track to operate in
either direction at a selected speed without manually moving
travel handles. When moving at desired speed and direction,
lift up travel detent selector on right travel handle dome. The
PC locks-in the travel information. When travel handle is
moved back to neutral position, travel speed and direction is
maintained.
Lifting travel detent selector again or moving either travel
handle or pedal in opposite direction from neutral, opens
travel detent circuit and returns control of travel system to the
operator.
Travel detent selector also serves as a brake function. Lift
the travel detent selector when travel handles are in neutral
position. This locks-in off condition with brakes spring-
applied and disables travel handles until travel detent
selector is released.
FIGURE 1-11
WA-01
8D
8
WB-10
WB-09
SELECT
CONFIRM
CRANE MODE
8T
0
0
8
WB-26
WB-33
DOWN SCROLL
UP SCROLL
WA-20
WA-29
K1
F4
WC-27
F8
LEFT TRAVEL
PRESSURE TRANSDUCER
RIGHT TRAVEL
SYSTEM FAULT
BUZZER
25A
25
OPERATING LIMIT
BEEPER
5A
5A
+
_
ENGINE
10A
5D
5A
F15
STOP
STOP
3
RUN
START
7
MS1
K1
5DA
8
8P1
50 AMP
CB7
PRESSURE TRANSDUCER
SEAT SWITCH
WB-34
999CSM1-110
F12
3A
REGULATED 10V DC OUTPUT
REVERSE
OFF
FORWARD
LEFT TRAVEL HANDLE
WA-07
WD-18
WD-19
DIGITAL DISPLAY
HS
10
TRAVEL BRAKE
SWING/TRAVEL ALARM
WC-23
LEFT TRAVEL PUMP CONTROL
B
A
EDC
REVERSE
OFF
FORWARD
RIGHT TRAVEL HANDLE
WA-06
LEFT TRAVEL PEDAL
WA-13
RIGHT TRAVEL PEDAL
WA-12
WB-01
TRAVEL DETENT
RIGHT TRAVEL PUMP CONTROL
WC-16
B
A
EDC
WD-31
HS
12
HIGH SPEED TRAVEL
WD-11
WC-10
8A
8
F3
5A
WB-35
HIGH SPEED TRAVEL
PROGRAMMABLE
CONTROLLER
3
2
3
13
3
1
3
12
3
7
3
11
3
4
3
5
Summary of Contents for 999
Page 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Page 2: ...R e f e r e n c e O n l y ...
Page 4: ...R e f e r e n c e O n l y THE ORIGINAL LANGUAGE OF THIS PUBLICATION IS ENGLISH ...
Page 297: ...R e f e r e n c e O n l y ...
Page 298: ...R e f e r e n c e O n l y ...