PLDC04452
REVISION 00
December 23, 2020
TECHNICAL OFFICE
Stavale
8
Isolate the red wire
A
.
9
Connect the clamp to the red wire
A
as shown in Figure 3.
11
Checking the current with no load, i.e. without brushes.
13
Turn the emergency button clockwise, Traction version only.
14
Press the button in instrument panel per the actuator of the brushes.
15
Controlling the rotation of the brushes using the drive lever, read the
CURRENT
(
A
) drawn by the brush
reduction drive.
16
Note down the value read, and then run the following check.
Checking the current in operation, i.e. with the brushes.
17
Replace the brushes on the reduction drive, and lower the brush head to the floor.
18
Repeat the readings, as described above.
19
Compare the values measured against the chart below.
20
If the values are OK, replace the brush motor cover.
21
If the values do not correspond to those specified (higher):
21a
Check that the brush drive (and thus the motor) is free to rotate, without interference.
21b
Check the power supply
VOLTAGE
(
V
) directly on the motor.
21c
Check that the motor carbon brushes are intact, see paragraph A1.2, replace if necessary.
With brushes operating
14.0 A
19.0 A
Current input A (Amperes)
Min
Max
No load, head lifted
4.0 A
6.0 A
21d
Replace the motor or the motors.
Fig. 3
A
A
A
4 of 68
