ep ICE301B, Руководство по обслуживанию

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24
REV. 09/2020
25
REV. 09/2020
TROUBLESHOOTING TROUBLESHOOTING
3 3
Table 3.1 Troubleshooting of Common Faults
Fault Fault Symptom Probable Causes Troubleshooting
Hydraulic
Failure
1. The vehicle cannot
lift
1. Pump motor does not work:
• Parking brake switch and seat
switch or its circuit connection
failure
• Pump motor or its circuit
connection failure
• Control switch or its circuit
connection failure
• Controller failure
2. Pump motor works:
• Overload
• Insufficient hydraulic oil
• Hydraulic pipeline leakage
• Pump motor reverse rotation
• Cylinder failure (blocked)
• Solenoid valve blocked and
cannot reset
• 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:
i. Check if parking brake switch
and seat switch or the con-
nection of its circuit is normal;
ii. Check the pump motor and its
connection circuit;
iii. Check the control button and
its connection circuit;
iv. Replace the controller.
2. Pump motor works:
i. Refer to the rated capacity
marked on the nameplate;
ii. Lower the mast to the bot-
tom, check if the amount of
oil in theoil tank can meet the
requirements;
iii. Check the pipe and hydraulic
components for oil leaks;
iv. Check the pump motor wiring;
v. Check the cylinder for dam-
age or deformation, remove
the cylinder to check for wear
or aged seals inside;
vi. Wash or replace the solenoid
spool
vii. Wash or replace the valve
body
2. The vehicle cannot
be lowered
• Solenoid valve (or manual valve)
or its circuit connection failure
• Lowering switch or its circuit
connection failure
• Valve failure;
• Cylinder deformation or blocked
• Explosion-proof valve blocked
1. Check the lowering button and
its connection circuit;
2. Check the solenoid valve and
its connection circuit;
3. Check the cylinder for defor-
mation, remove the cylinder to
check if the internal assembly
is normal
4. Clean or replace the valve;
5. Replace the explosion-proof
valve.
Motor Fault
6. On load, motor
speed is turning
slow
• Insufficient voltage of battery;
• Overload;
• U, V, W terminals with abnormal
voltage input;
• Speed encoder or its circuit
failure.
1. Check the voltage of battery ;
2. Refer to the rated capacity
marked on the nameplate;
3. Check the battery output;
4. Replace the speed encoder
or wiring harness;
Gearbox Fault
1. Gearbox Abnormal
Noise
• Supporting bearing wear;
• Gear wear, the gap is too big;
• Foreign objects in gear oil.
1. Replace the bearing;
2. Replace the gear;
3. Replace the gear oil.
2. Gearbox Oil Leaks • Oil seal wear or aged 1. Replace the oil seal
3. Gearbox Stuck
• Gear fastening screws or nuts
loosening;
• Support bearing damage
• Foreign objects in gear oil.
1. Tigten the screws or nuts;
2. Replace the support bearing;
3. Replace the gear oil.
Drive Axle
Fault
1. Drive Axle Abnormal
Noise
• Supporting bearing wear;
• Gear wear, the gap is too big;
• Foreign objects in gear oil.
1. Replace the bearing;
2. Replace the gear;
3. Replace the gear oil.
2. Drive Axle Oil Leaks • Oil seal wear or aged 1. Replace the oil seal
3. Drive Axle Stuck
• Drive Axle fastening screws or
nuts loosening;
• Support bearing damage
• Foreign objects in gear oil.
1. Tigten the screws or nuts;
2. Replace the support bearing;
3. Replace the gear oil.
Brake Fault 1. Brake dragging
• No free play of brake pedal.
• Improper shoe sliding.
• Improper operation of wheel
cylinder.
• Faulty piston cup.
• Weak or broken return springs.
• Clogged master pump return
port.
• Clogged oil lines.
• Wheel bearing out of adjusting.
1. Adjust.
2. Adjust.
3. Adjust or replace.
4. Replace.
5. Replace.
6. Clean.
7. Clean.
8. Adjust or replace.
Table 3.1 Troubleshooting of Common Faults
Fault Fault Symptom Probable Causes Troubleshooting
* Carry out trouble shooting in accordance with the order listed in the table, it can help you quickly
identify problems and resolve accordingly.
*
Carry out trouble shooting in accordance with the order listed in the table, it can help you quickly
identify problems and resolve accordingly.