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Symptom
Drive functions do
not work.
Wheels will not turn when
winching.
Only slow drive speed works.
Steer wheels do not turn right or
left on machines with tow option.
Tilt alarm does not work.
Circuit breaker will not reset.
Electrical outlet does not work.
Improper AC generator output
voltage.
Hydraulic fluid temperature 93°C
(200°F ) or more.
Severe hydraulic leak.
SB47JRT – 0075522
Possible Cause
The drive/boom switch is in the boom
position.
Machine on too steep a grade.
Drive hubs are disengaged.
Low hydraulic system pressure.
Platform overload sensor is tripped.
Drive hubs are engaged.
The booms are elevated. High range
not selected.
Tow kit steering float valve is open.
Booms are stowed.
Electrical circuit has not had time to
cool.
Electrical system malfunction.
Power supply not plugged in.
Machine/generator switch not in the
generator position.
Hydraulic oil is cold and thick.
Prolonged boom operation or driving.
High pressure fluid return to reser-
voir caused by kinked or twisted
hose.
Hydraulic system component failure.
Failure of hose, tube, fitting, seal,
etc.
Chapter 11 – Troubleshooting
Corrective Action
Place the switch in the drive position.
Lower the booms and drive to a level
surface.
Turn drive wheel disconnect plates
around so nipples point outward.
Stow the machine and do not oper-
ate until repairs are made.
If horn is sounding and red overload
light is on or blinking, remove weight
from the platform until the load is at
or below rated capacity.
Turn drive wheel disconnect plates
around so nipples point inward.
Completely lower the booms. Place
the drive range switch in the high po-
sition.
Close the steering float valve.
Normal operation. The tilt alarm is not
active until the booms are elevated.
Wait a minute or two for circuit to
cool, then push circuit breaker but-
ton in to reset.
Do not operate machine until repairs
are made.
Plug the power cord into the power-
input connector on the generator.
With engine running, place the ma-
chine/generator switch in the genera-
tor position.
Use cold weather hydraulic oil as rec-
ommended. Warm oil before operat-
ing the machine.
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 oper-
ate until repairs are made.
Do not operate machine until repairs
are made.
57
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