EP Equipment LIST JX0, Руководство по обслуживанию

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REV. 07/2019
TROUBLESHOOTING
9
163
Table 9.1 Troubleshooting of Common Faults (continued)
Fault Fault Symptom Troubleshooting Order * Troubleshooting Measures
Hydraulic
Failure
1. The platform cannot
lift
1. Pump motor does not work:
a. Foot switch and door safety
switch or its circuit connection
failure
b. Pump motor or its circuit
connection failure
c. Lifting switch or its circuit
connection failure
d. Lifting limit switch or its circuit
connection failure
e. Controller failure
2. Pump motor works:
a. Overload
b. Insufficient hydraulic oil
c. Hydraulic pipeline leakage
d. Pump motor reverse rotation
e. Cylinder failure (blocked)
f. Solenoid valve blocked and
cannot reset
g. Valve body failure:
excessive wear of gear pump,
serious internal leaks, insufficient
pressure of relief valve or
blocked, check valve blocked
1. Pump motor does not work:
1) Check if the foot switch and
door safety switch or the con-
nection of its circuit is normal;
(See Section 8.5 and Section 8.4)
2) Check the pump motor and its
connection circuit;
(see Section 7.3)
3) Check the lifting switch and its
connection circuit;
(see Section 6.3)
4) Check the lifting limit switch
and its connection circuit;
(see Section 8.4)
5) Replace the controller.
2. Pump motor works:
1) Refer to the rated capacity
marked on the nameplate;
2) Lower the mast to the bottom,
check if the amount of oil in the
oil tank can meet the requireme-
nts (see Section 2.2.3);
3) Check the pipe and hydraulic
components for oil leaks;
4) Check the pump motor wiring;
5) Check the cylinder for damage
or deformation, remove the
cylinder to check for wear or
aged seals inside;
(see Section 7.6)
6) Wash or replace the solenoid
spool (see Section 7.5)
7) Wash or replace the valve body
(see Section 7.2.2)
2. The storage table
cannot lift
The push rod failure Replace the push rod
（
see
Section 7.4
）
1) Check the lowering button and
its connection circuit;
(see Section 6.3)
2) Check the solenoid valve and
its connection circuit;
(see Section 7.5)
3) Check the cylinder for
deformation, remove the
cylinder to check if the internal
assembly is normal ;