Haklift Oy
Asessorinkatu 3-7
20780 Kaarina, Finland
Tel. +358 2 511 5511
www.haklift.com
Lifting Solutions Group
Axel Johnson International
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 the 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 ~ 40ºC, HL-N32 is adopted and when the ambient temperature is -35
~ -5ºC, HV-N20 low temperature hydraulic oil is 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 equipment 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
Analysis of cause
Trouble shooting
1
Hydraulic oil
leakage.
1. Failed oil seal.
2. Slight damage or wear
on the surface of one or
two components.
3. Loose connection.
1. Replace the oil seal.
2. Replace the damaged
components.
3. Re-tighten the
connection .
2
Fork does not lift.
1. Too great viscosity of
hydraulic oil or hydraulic
oil has not been injected.
2. Foreign matters in the
oil.
3. The hydraulic power
unit is damaged.
1. Replace hydraulic oil.
2. Remove the foreign
matter in oil or replace
hydraulic oil.
3. Replace the hydraulic
power unit.
3
Fork does not
lower.
Manual lowering valve is
not adjusted well.
Adjust the position of
lowering valve screw.
