Troubleshooting Guide
Problem
Cause
Solution
Machine will not start.
Seat Safety Switch is engaged.
Make sure that you’re sitting on seat.
Emergency Stop (E-Stop) switch is engaged. Twist E-Stop switch to expose green ring.
Circuit breaker is in the OFF position.
Verify circuit breaker is in ON position.
48 volt blue plugs are not connected.
Make sure that connection plugs are fully
installed.
“Start” button did not fully engage.
Firmly press down green start button.
Machine doesn’t run as long as it used to.
Battery is not fully charging.
Verify that you are charging machine with
provided seven foot power cord.
Verify that charger is working properly. Char-
ger has a LED light to indicate.
The 48 volt blue plugs are not connected.
Check that connection plugs are fully
installed.
Batteries no longer hold a charge.
Call National for procedure to have batteries
load tested.
Machine is making rattling noises.
Loose hardware on machine.
Inspect and tighten bolts as needed.
Charger is hot.
Charger is in use.
This is normal.
Fluid is leaking from machine.
Hose connections/or
fi
ttings have loosened
through normal use.
Tighten hydraulic hoses and
fi
ttings as
needed.
Pin hole in the hoses.
Replace affected hose.
Oil and/or oil
fi
lter are old.
Replace oil and oil
fi
lter yearly on machine.
Tires/Wheel motors make a slight clicking
noise.
Normal noise with proper operation.
Machine is jerky or jumpy.
New operator
Additional time is required to become familiar
with machine.
Control levers are being moved to quickly.
Operate control levers with wrist resting on
knees for additional support or purchase arm
rest.
Coupling leaks at thread or seat.
Missing or damaged O -rings.
Check for missing or damaged O-rings;
replace if necessary.
Damaged threads due to misalignment or
improper seat angle.
Correct seat angle. Check for thread dam-
age; replace if necessary.
Over or under torquing.
Only hand tighten hardware.
Any issues not listed above.
Please contact National to speak with a
technician.
www.nationalequipment.com
Phone: 763-315-5300
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