H-3
H-3
Outrigger Extension Length Detector
8
W305-0350E
Outrigger Extension Length Detector
[NOTICE]
There is a case that the appearance and so on
differ from the parts for this machine. Although there
is not so much difference in functions and
disassembly procedures, make sure of the serial
number of this machine and the part sales unit
described in the parts catalog before starting
disassembling operations.
1
. Structure and function
1
. The detector consists of the following major
components: a spiral spring, wire, and
potentiometer.
2. The wire wound around the drum is unwound or
rewound by the action of the spiral spring as the
cylinder extends or retracts.
3. The consequent rotation of the drum drives the
potentiometer shaft through gears which reduce
the speed to 5/6.
4. The rotation of the shaft causes a proportional
change in the electrical resistance of the
potentiometer. This change is supplied by the
multiplex data transmission (MDT) system to the
AML (Load Moment Indicator) unit for detection of
the outrigger extension length.
5. When the wire is reeled out, the gears,
potentiometer, and potentiometer brush either
rotate or move.
0V
Out put
B
Potentiometer
R
W
1
3
2
Black
Red
White
+5V (Power supply)
IW305-0250E0
1
1
11 1
2
9
1
0
2
3
4
5
6
7
8
1
5
1
6
1
3
20
1
7
1
4
IW305-0350E0
1
Use silicon sealant to seal
the part that is shaded.
1
8
0V (Black)
Power supply (Red)
Output (White)
1
9
Electric symbols
Содержание TT-800XXL1
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