Upright SB47JRT Operator's Manual page 61

Symptom
Constant tone alarm sounds and
engine shuts off.
Horn is sounding intermittently
and the overload light is flashing.
Horn is sounding constantly and
the overload light is on.
Platform overload sense system
does not work while operating the
upper controls.
Boom functions do not immedi-
ately return when switching from
drive to boom. There is a delay in
boom functions after switching the
drive/boom switch to the boom
position after driving the machine
with the boom below horizontal.
All functions stop working.
Lower controls do
not work.
SB47JRT – 0075522
Possible Cause
High engine temperature.
Low oil pressure.
The load in the platform is greater
than the rated capacity.
The platform overload system has an
error.
Drive/boom selector switch is in the
drive position and the main boom is
below horizontal.
System needs calibration.
Platform overload system delay.
Low fluid level in reservoir.
Engine or pump failure.
Circuit breaker is tripped.
Electrical system malfunction.
Platform overload sensor is tripped.
Battery disconnect switch turned off.
Emergency stop switch at lower con-
trols is pushed in to the off position.
Chapter 11 – Troubleshooting
Corrective Action
Let the engine cool. Do not restart
the engine until the cause of overheat-
ing has been corrected.
Do not restart the engine until the
cause of low oil pressure has been
corrected. The engine can be re-
started with low oil pressure, but it
will only run a few seconds before it
shuts off again.
Remove load from the platform until
the alarms stop.
Remove load until at or below rated
capacity. Cycle machine power off,
then on. If alarm continues, system
may need recalibration.
Normal operation. The platform over-
load system is inactive while driving
with the boom below horizontal to
prevent accidental activation due to
rough terrain.
Refer the problem to a qualified ser-
vice technician.
Normal operation. The system in-
cludes a 5 second delay to eliminate
rapid stop and restart of movements
if the overload system trips during
operation.
Check fluid level. Add correct type of
fluid if necessary.
Manually stow the machine using the
emergency power system or the
emergency lowering knob.
Push circuit breaker button in to re-
set.
Manually lower the boom using the
emergency lowering knob.
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.
Place switch in the on position.
Pull the emergency stop button out
to the on position.
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