Chapter 11 – Troubleshooting
SB85J Fixed Axle – 0112975 57
Symptom
Engine starts from the upper con-
trols but no boom functions
work – machines with AC gen-
erator option only.
Engine dies when the control se-
lector switch at the lower con-
trols is placed in the upper
conttrol position.
Constant tone alarm sounds
while the engine is running.
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.
Possible Cause
The machine/generator switch is in
the generator position.
Upper controls are not set-up properly.
High engine temperature.
Low oil pressure.
No alternator current/broken fan belt.
High engine temperature.
Low oil pressure.
The load in the platform is greater
than the rated capacity.
The platform overload system is in
error mode.
Drive/boom selector switch is in the
drive position and the main boom is
below horizontal.
System needs calibration.
Corrective Action
Place the switch in the machine po-
sition to operate machine functions.
At the upper controls, pull the emer-
gency stop button upward and turn
the anti-restart master switch on.
Lower the platform and reduce the
engine speed to idle for five minutes.
Turn the engine off and let it cool. Do
not restart the engine until the cause
of overheating has been corrected.
Lower the platform and turn the en-
gine off. Do not restart the engine until
the cause of low oil pressure has been
corrected.
Turn the engine off. Do not restart the
engine until the cause of no alterna-
tor current has been corrected or the
fan belt is replaced.
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 booms in the stowed posi-
tion to prevent accidental activation
due to rough terrain.
Refer the problem to a qualified ser-
vice technician.
To Next Page
Loading...
