EP Equipment LIST JX0, Руководство по обслуживанию

Страница: 56 / 206

43
REV. 07/2019
DRIVE SYSTEM
5
Air Gap Checks
-
-
-
Switch off the truck power connections and
pull out the brake connectors;
Check the air gap between electromagnetic
coil and pressure plate with feeler gauge:
measurement method is as shown in Figure
30205;
Determine if the air gap is normal according
to the gauge measurements.
As shown in the following table:
Air gap distance Judgment
0.2~0.4mm Normal
> 0.4mm
The air gap is too large
(replace brake pads)
After a period of use, brake pads of the electr-
omagnetic brake will wear. After being worn
too much, the air gap between electromagnetic
coil and pressure plate may exceed the
predetermined maximum value, which may
cause electromagnetic absorption failure.
Check if there is foreign body in the air gap that
may affect the absorption or bouncing off of the
pressure plates.
Spring Checks
Deformation or foreign bodies stuck in the
spring may affect the normal absorption of
pressure plates.
Check if the distribution of the springs on the
electromagnetic coil is correct, and check if
there is foreign body in the spring hole.
After a period of time of use, the springs may
be deformed due to the effect of radial force,
such case may result in abnormal air gap of the
brake, and the spring must be replaced.
5.2.4 Control Circuit Troubleshooting
Brake Control Circuit (Figure 50211)
Check if the circuit is broken by using a multi-
meter:
-
-
-
Set the multimeter to ON-OFF;
Check if #45 circuit (circuit between brake
and controller) is conducted;
Check if #46 circuit (circuit between brake
and controller) is conducted;
Foreign Body Checks
Foreign bodies stuck in the brake may affect the
normal absorption of pressure plates.
i
NOTE
i
NOTE