Snorkel TB42J, Operato'S Manual

Page: 61 / 68

Chapter 11 – Troubleshooting
TB42J – 0172310 57
Symptom
Constant tone alarm sounds and
engine shuts off.
All functions stop working.
Lower controls do
not work.
Upper controls do
not work.
Boom and drive functions seem
sluggish.
Tip boom will not extend and the
white envelope restriction light is
illuminated on the upper controls.
Possible Cause
High engine temperature.
Low oil pressure.
Low fluid level in reservoir.
Engine or pump failure.
Circuit breaker is tripped.
Electrical system malfunction.
Battery disconnect switch turned off.
Emergency stop switch at lower con-
trols is pushed down to the off posi-
tion.
Controls switch is in the platform po-
sition.
Ground controls switch not held in
the on position.
Battery disconnect switch turned off.
Emergency stop switch at lower and
upper controls is in the off position.
Control selector switch at lower con-
trols is in the ground position.
Platform foot switch not engaged.
Hydraulic oil is cold and thick.
Normal machine operation when the
boom is in the restricted area of the
working envelope.
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.
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.
Place switch in the on position.
Place the emergency stop switch in
the on position.
Place the switch in the ground posi-
tion.
Hold the ground controls switch in the
on position while operating the con-
trol toggle switches.
Place switch in the on position.
Place the emergency stop in the on
position.
Place switch in the platform position.
Step down on platform foot switch
while operating controls.
Use cold weather hydraulic oil as rec-
ommended for weather conditions.
Warm oil before operating the ma-
chine.
Raise the main boom until the white
envelope restriction light goes off and
then extend the tip boom.