S2255RT S2755RT - 15286-1 53
Chapter 11 – Troubleshooting
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 qualifi ed maintenance
personnel.
Troubleshooting Chart
Symptom Possible Cause Corrective Action
All functions stop working. Motor or pump failure. Manually stow the machine using the
emergency lowering handle.
Low fl uid level in reservoir. Check hydraulic fl uid level. Add correct
type of fl uid if necessary.
Batteries discharged. Recharge batteries.
Electrical system malfunction. Stow the machine and do not operate
until repairs are made.
Platform will not raise or lower
from lower controls.
Control select/ground operation
switch is in the upper control or the
off position.
Place the switch in the lower control
position.
Battery disconnect is turned off . Place the switch in the on position.
Emergency stop button is pushed
inward to the off position.
Pull the emergency stop button outward
to the on position.
Emergency lowering handle is not
properly disengaged.
Make sure the handle returns to the
normal operating position.
Platform will not raise or lower
from upper controls.
Drive/lift selector is in the drive
position.
Place switch in the lift position.
Emergency lowering handle not
properly disengaged.
Make sure the handle returns to the
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 will not raise, or rais-
es slower than normal.
Emergency lowering handle not
properly disengaged.
Make sure the handle returns to the
normal operating position.
Platform capacity has been
exceeded.
Remove load from platform. Refer to
platform capacity placard for maximum
capacity.
Platform drifts down. Emergency lowering handle not
properly disengaged.
Make sure the handle returns to the
normal operating position.
Hydraulic system malfunction. 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. Extension handle is not fully en-
gaged, releasing the lock.
Lift both extension handles fi rmly to fully
disengaged the locks, before extending
the platform.
Drive functions don’t work. Drive/lift selector is in the lift position. Place the switch in the drive position.
Machine is not on a level surface or
too steep a grade.
Lower the platform and drive to a level
surface.
Free-wheeling valve is open Fully close the free-wheeling valve.
Load capacity exceeded. Remove load from platform. Refer to
platform capacity placard for maximum
capacity.
Low hydraulic system pressure. Stow the machine and do not operate
until repairs are made.
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