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9. Troubleshooting
Problem
Possible cause
Solution
1. Forks do not
elevate, do not
elevate fully or
elevate slowly
1.1 Low hydraulic fluid
leveI or impurities in
oil
1.2 Swing rod is out of
adjustment
1.3 Load is too heavy.
Overload release
valve is being
activated
1.4 Temperature is
too low and the
hydraulic oil has
become too thick
1.5 Air in the hydraulic
oil
1. Add approved hydraulic
fluid or change the oil
(
→
10.7 Adding
hydraulic oil to the
pump reservoir)
2. Follow the procedure
for adjusting the swing
rod (
→
7.3 Swing rod
adjustment)
3. Reduce load
4. Move product to a
warmer location
5. Bleed the pump unit
(
→
10.6 Bleeding the
hydraulic system)
2. Forks do not
descend or do not
descend fully
2.1 Obstacle located
under the forks or in
lifting mechanism
2.2 Swing rod is out of
adjustment
2.3 Forks were left in an
elevated position for
an extended time
causing the exposed
big piston rod to rust
2.4 The big piston rod or
pump is deformed
due to over-loading
or uneven loading
1. Use caution removing
the obstacle
2. Follow the procedure
for adjusting the swing
rod (
→
7.3 Swing rod
adjustment)
3. Keep fork in the lowest
position when not
in use and keep the
big piston rod well
lubricated
4. Have the big piston rod
or pump unit replaced
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