M
AINTENANCE
& I
NSPECTION
C
HAPTER
9
9-28
THP 94/42 R 4 XXT
THP 125/42 R 4 XXT
THP 140 H/42 R 4 XXT
GB-07.2005
•
The difference between the two values is
the exact value for the measured backlash.
This value must be entered in the boom
test book every time the boom is tested.
The maximum permissible value shown in
the adjoining table must not be exceeded.
9.8.7
Checking the operation of the
sensors
The operation of the sensors is checked as follows:
There are two ways of checking the condition of the
sensors.
1.
Directly in the sensor or in its plug there are one or two
LEDs.
One LED
Green =
Switch activated
Two LEDs
Green =
Power on
Yellow =
Switch activated
2.
On the 4-fold distributor there are
Two green LEDs
Power for the sensors
Each with a yellow LED
Switch activated
Drive cylinder sensors:
Move the drive cylinder (
1
)
to the end of its travel to
check the operation of the
sensor (
2
).
Oscillation cylinder sensors:
Move the oscillation
cylinder (
3
) to the end of
its travel to check the
operation of the sensor (
4
).
Rolling dia-
meter [mm]
Ball diameter [mm]
25
30
40
20
22
1,9
2,0
2,5
1,8
1.000
1,9
2,0
2,1
2,6
1,9
1.250
2,0
2,1
2,2
2,7
2,0
1.500
2,1
2,2
2,3
2,8
1.750
2,2
2,3
2,4
2,9
2.000
2,5
3,0
2.250
3,1
2.500
Fig. 9.22 Maximum values for the boom backlash
Drive cylinder
Oscillation cylinder
1
2
3
4
Fig. 9.23 Checking the operation of the sensors
