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Routine maintenance: Once everyday and the main content is to keep the surface clean
and examine if the power supply cable is damaged.
Level 1 maintenance: Once every week. The maintenance contents, besides the contents
of routine maintenance, should focus on if the operation of the components is normal, if
the fastening items are loose, if there is any oil leakage, if there is any abnormal wearing
in mechanical components, if there are abnormal temperature rise or sparks in electric
equipment, etc. Adjustment and trouble shooting should be conducted if any abnormal
situation is discovered.
Level 2 maintenance: It should be conducted periodically and overall inspection should be
conducted according to following requirements:
a. Mechanical maintenance should be conducted every half a year. The main contents are
to replace lubricating oil for the transmission gear and bearing of the drive wheel, apply
lubricant to various rotating joints, while examining if the fastening items are loose, if
the wheels are rotating flexibly, if the fork rises and declines normally. The operation
noise of the truck after maintenance should be no greater than 70db.
b. Maintenance of hydraulic system: Once every 12 months. Examine if the oil cylinders
are in normal state, if there is any internal or external leakage and if the hydraulic oil is
clean. The hydraulic oil is usually replaced every 12 months. ISO oil standard is applied
to hydraulic oil. When the ambient temperature is -5 ~ 40 , HL
when the ambient temperature is -35 ~ -5 , HV
used. The waste oil from the replacement should be treated according to the relevant
local regulation and law. Examine if the operation of the load limit valve is normal.
c. Electric equipment maintenance: It should be conducted every three months to examine
if the connectors of electric equipments are reliable, if the switches are normal and if the
insulation of the electric equipment is in normal condition （The insulation resistance of
electric equipment and the truck body should be greater than 0.5MΩ.
6. Common faults and trouble shooting
The table below provides some common failures of the truck in operation and the trouble
shooting：
No.
Faults
Hydraulic
1
leakage
2
Fork does not lift
℃
Analysis of cause
1. Failed oil seal
2. slight damage or wear
oil
on the surface of one or
two components
3. Loose connection
1. Too great viscosity of
hydraulic
hydraulic oil has not
been injected.
2. Foreign matters in the
oil.
3. The hydraulic power
unit is damaged.
~ 10 ~
-N32 is adopted and
℃
-N20 low temperature hydraulic oil is
Trouble shooting
1. Replace the oil seal
2. Replace the damaged
components
3.
Re-tighten
connection
1. Replace hydraulic oil
oil
or
2. Remove the foreign
matter in oil or replace
hydraulic oil
3. Replace the hydraulic
power unit
the
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