5. TROUBLESHOOTINg
#
Problem
Cause
Solution
1 The forks will not rise to
maximum height
Not enough hydraulic oil
Add oil
2 The forks cannot be
raised
• No hydraulic oil
• The oil has impurities
• The nut (104) is too high and keeps
the pumping valve open
• Air got into the hydraulic oil
• Add oil
• Change the oil
• Adjust the nut (104) or the screw
(318). (See item 3.4)
• Release the air (See item 4.2)
3 The forks cannot be
lowered
• The piston rod (328) or pump (322)
is deformed from improper loading
or overloading
• The fork was left at maximum
height for a long time and the
piston rod rusted or jammed
• The adjusting nut (104) or the screw
(318) is in the wrong position
• Replace the piston rod (328) or
pump (322)
• Keep the fork in the lowest position
when not in use and lubricate the
rod
• Adjust the nut (104) or the screw
(318). (See item 3.3)
4 Leaks
• Sealing parts are worn or damaged
• Some parts are cracked or worn
• Replace the worn or damaged parts
• Replace the cracked or worn parts
5 The forks lower without
the release valve
• Impurities in the oil cause the
release valve to be unable to close
tight.
• Some parts of the hydraulic system
are cracked or worn
• Air got into the oil
• Sealing parts are worn or damaged
• The adjusting nut (104) or the screw
(318) is in the wrong position
• Replace with new oil
• Inspect and replace the damaged
parts
• Release the air (See item 4.2)
• Replace the worn or damaged parts
• Adjust the nut (104) or the screw
(318). (See item 3.2)
NOTE: DO NOT ATTEMPT TO REPAIR THE PALLET TRUCK UNLESS YOU ARE TRAINED
AND AUTHORIZED TO DO SO.
