Snorkel 460SJ Operator's Manual page 76

Chapter 11 – Troubleshooting
Symptom
Boom and drive functions operate
at reduced speeds while generator
is running.
Boom and drive functions seem
sluggish.
Main boom will not raise or ex-
tend.
Main boom drifts down.
Drive functions do not work.
Can not reach maximum drive speed
of 4.25 mph (6.6 km/h).
Wheels will not turn when
winching.
Steer wheels do not turn right or left
– machines with tow option.
Tilt alarm does not work.
Circuit breaker will not reset.
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Possible Cause
The AC generator switch is in the gen-
erator position.
Hydraulic oil is cold and thick.
Boom switch error. Faulty switch.
The emergency lowering valve is
open.
Hydraulic system malfunction.
Load capacity exceeded.
Machine on too steep a grade.
Drive hubs are disengaged.
Low hydraulic system pressure.
Booms are not retracted and lowered.
Drive range switch is in low (turtle).
Low engine rpm.
Drive hubs are engaged.
Tow kit steering float valve is open.
Booms are stowed.
Electrical circuit has not had time to
cool.
Electrical system malfunction.
Corrective Action
Normal operation. Boom and drive
functions will operate at reduced
speeds while the generator is oper-
ating.
Use cold weather hydraulic oil as
recommended for weather condi-
tions. Warm oil before operating the
machine.
Stow the machine and do not operate
until repairs are made.
Turn the emergency lowering knob
fully clockwise to close the valve.
Stow the machine and do not operate
until repairs are made.
Remove load from platform. Refer to
platform capacity placard for maximum
capacity.
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 operate
until repairs are made.
Fully retract and lower the booms.
Place the switch in the high (rabbit)
position.
Stow the machine and do not operate
until repairs are made.
Turn drive wheel disconnect plates
around so nipples point inward.
Close the steering float valve.
Normal operation. The tilt alarm is
not operational when the booms are
stowed.
Wait a minute or two for circuit to cool,
then push circuit breaker button in to
reset.
Do not operate machine until repairs
are made.
460SJ – 1433685