Symptom
Possible Cause
Corrective Action
Drive functions
don’t work.
Drive/lift selector is in the lift position.
Machine is not on a level surface or too
steep a grade.
Free-wheeling valve is open.
Load capacity exceeded.
Low hydraulic system pressure.
Place the switch in the drive position.
Lower the platform and drive to a level
surface.
Fully close the free-wheeling valve.
Remove load from platform. Refer to
platform capacity placard for maximum
capacity.
Stow the machine and do not operate
until repairs are made.
Only slow drive
speed works.
Platform elevated above 6
′
(1.8 m).
Lower platform to drive machine at
faster speed.
Machine will not steer.
Joystick interlock switch not engaged.
Engage the interlock switch before
operating the steer switch.
Electrical outlet does not
work.
Power supply not plugged in.
GFCI is tripped.
Plug a source of power into the
power-input connector at front of
chassis.
Push reset button on outlet.
Wheels won’t turn when
winching or pushing.
Brake pins engaged.
Free-wheeling valve closed.
Rotate brake release cams to
disengage brakes.
Fully open free-wheeling valve.
Brakes don’t work.
Brake pins not engaged.
Manually release brake cams with a
wrench or drive the machine to reset
the brakes.
Tilt alarm does not work.
Platform is not raised more
than 6
′
(1.8 m).
Normal operation. The tilt alarm is not
active until the platform is raised more
than 6
′
(1.8 m).
Ammeter does not
indicate a reading when
charging the batteries.
No source of power.
Charger power fuse is blown.
Make sure power source is plugged in
and turned on.
Stow the machine and do not operate
until repairs are made.
Hydraulic fluid
temperature of 160°F
(71°C) or more.
Prolonged driving or platform operation.
High pressure fluid return to reservoir
caused by kinked or twisted hose.
Hydraulic system component failure.
Stop operation until fluid cools.
Remove the kink or twist from the hose.
Let fluid cool before resuming
operation.
Stow the machine and do not operate
until repairs are made.
Severe hydraulic leak.
Failure of hose, tube, fitting, seal, etc.
Stow the machine and do not operate
until repairs are made.
12 - 2
S1930 – 0361266
Chapter 12. Troubleshooting
