S1930 – 0361266
12 - 1
Chapter 12. Troubleshooting
Troubleshooting Chart
Symptom
Possible Cause
Corrective Action
All functions stop working.
Motor or pump failure.
Low fluid level in reservoir.
Electrical system malfunction.
Manually stow the machine.
Check fluid level. Add correct type of
fluid if necessary.
Stow the machine and do not operate
until repairs are made.
Platform will not raise or
lower from lower controls.
Control selector switch in the upper
control position.
Battery disconnect switch turned off.
Emergency stop button pushed inward
to the off position.
Emergency lowering lever not properly
disengaged.
Place switch in the lower control
position.
Place switch in the on position.
Pull the emergency stop button outward
to the on position.
Ensure lever returns to normal
operating position.
Upper controls will
not work.
Control selector switch in the lower
control position.
Battery disconnect switch turned off.
Emergency stop button pushed inward
to the off position.
Place switch in the upper control
position.
Place switch in the on position.
Pull the emergency stop button outward
to the on position.
Platform will not raise or
lower from upper controls.
Drive/lift selector is in the drive position.
Emergency lowering lever not properly
disengaged.
Place switch in the lift position.
Ensure lever returns to normal
operating position.
Platform will not raise and
alarm is sounding.
Machine is not on a level surface.
Lower the platform and drive to a level
surface.
Platform drifts down.
Emergency lowering lever not properly
disengaged.
Hydraulic system malfunction.
Ensure lever returns to normal
operating position.
Stow the machine and do not operate
until repairs are made.
Platform will not lower.
Safety prop in place.
Stow the safety prop.
Platform will not extend.
Latch pin still in place.
Remove latch pin before extending the
platform.
The troubleshooting chart may be used to locate and
eliminate situations where machine operation may be
interrupted. If the problem cannot be corrected with the
action listed, stow the machine and remove it from ser-
vice. Repairs must be made by qualified maintenance
personnel.
