EP Equipment LIST JX0, Руководство по обслуживанию

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42
REV. 07/2019
DRIVE SYSTEM
5
5.2.3 Checking and Testing
Electromagnetic Coil Checks
-
-
Switch off the truck power connections and
pull out the brake connectors;
Check the resistance of the coil with a multi-
meter: measurement method is as shown in
Figure 30206;
- Identify if the electromagnetic coil is normal
according to the readings of resistance on the
multimeter.
As shown in the following table:
Resistance
Measurement
Judgment
Approx. 30 Ω Normal
0 Ω
Coil shorting
(replace the brake)
∞
Ω
Coil breaking
(replace the brake)
When installing the brake gear (7), make sure
the flat key is installed on the shaft of drive
motor (8).
CAUTION
Adjustment
The electromagnetic brake used in this series of
truck is an air gap adjustment-free brake. After
the normal installation is completed, the air gap
between electromagnetic coils and pressure
plate should be standard gap distance.
As shown in the following table:
Air gap Standard value Maximum value
s 0.2 mm
0.4 mm
When the air gap s exceeds 0.4mm, replace the
brake pads (2, Figure 30203)
5.2.2 Faults and Causes
1
Fault After the coil is energized, the
pressure plate does not absorb
Cause
a. Mechanical part failure;
b. Foreign body blocking;
c. Coil failure;
d. Coil supply voltage less than
24V
CAUTION
2
Fault
After the coil is powered off, the
pressure plate won't release
Cause Foreign body blocking
3
Fault Abnormal noise after absorption
Cause
a. Fully absorbed, but plate not
flat.
b. Mechanical resistance
4
Fault Brake temperature is too high
Cause
Pressure plate does not fully
absorb, overcurrent of the coil, or
energized too frequently