Reference
Only
INTRODUCTION
999 SERVICE/MAINTENANCE MANUAL
1-26
Published 05-16-17, Control # 233-03
FRONT/REAR DRUM SYSTEM
See Figures
The left drum handle (1) operates front drum while right drum
handle (2) operates rear drum. Hydraulic connections
between front or rear drum pump and motor form a closed-
loop system. For load drum operation, system low-pressure
side hydraulic fluid releases load drum brake (3) and drum
pawl (4).
The left travel charge pump supplies pilot pressure for front
and rear motor servo (5) operation. Pressure senders (6) in
high and low-pressure side of rear drum (high-pressure side
of front drum) provides system pressure information to the
PC.
Continuous changing of closed-loop fluid occurs through
leakage in motor and external sequence/flow valve (7).
Sequence/flow valve opens at 200 psi (14 bar) and removes
6 GPM (23 L/min) of hot fluid from system by dumping fluid in
the motor case where fluid returns to tank through cooler.
When a front or rear load drum rotates, speed encoder (8)
sends an input signal to the PC. The PC sends an output
signal that enables rotation indicator (9) in selected load
drum control handle. Rotation indicator on top of each
control handle pulsates with a varying frequency that
indicates rotational speed of load drum. As drum rotates
faster, the indicator pulsates faster.
FIGURE 1-17
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-22
WA-23
K1
F4
F8
REAR DRUM
PRESSURE TRANSDUCER
FRONT DRUM
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
999CSM1-116
F12
3A
REGULATED 10V DC OUTPUT
RAISE
OFF
LOWER
FRONT DRUM
WA-03
WD-18
WD-19
DIGITAL DISPLAY
WC-05
FRONT DRUM
B
A
EDC
RAISE
OFF
LOWER
REAR DRUM
WA-04
REAR DRUM
WC-06
B
A
EDC
3
2
3
1
3
6
3
9
RIN
BLOCK UP LIMITS
3
13
3
12
HS
16
FRONT DRUM
WD-33
HS
20
FRONT DRUM
WD-08
WC-18
WD-27 ROTATION INDICATOR
FRONT DRUM
19
HS
FRONT DRUM PAWL IN
WD-32
BRAKE
WD-24
FD
PCP
FRONT DRUM
WD-25
RD
PCP
REAR DRUM
PUMP CONTROL
PUMP CONTROL
MOTOR CONTROL
MOTOR CONTROL
WD-28
ROTATION INDICATOR
REAR DRUM
WD-35
REAR DRUM
24
HS
REAR DRUM PAWL IN
WD-34
25
HS
PAWL OUT
PAWL OUT
WD-09
WC-19
21
HS
REAR DRUM
BRAKE
3
8
FRONT DRUM
SPEED
ENCODER
F
A
B
D
SHAFT
WD-01
WD-02
REAR DRUM
SPEED
ENCODER
F
A
B
D
SHAFT
WD-03
WD-04
3
14
3
11
3
10
PROGRAMMABLE
CONTROLLER
8D
8
F4
5A
Содержание 999
Страница 1: ...R e f e r e n c e O n l y Service Maintenance Manual Manitowoc 999 ...
Страница 2: ...R e f e r e n c e O n l y ...
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Страница 173: ...R e f e r e n c e O n l y Manitowoc Published 05 16 17 Control 233 03 4 19 999 SERVICE MAINTENANCE MANUAL BOOM 4 ...
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