Snorkel TB42, Operator'S Manual

Page: 61 / 68

Chapter 11 – Troubleshooting
TB42/TB50 – 0075251EE 57
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.
Possible Cause
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.
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.
The horn is sounding and red over-
load light is blinking.
Platform overload sensor is in error
mode. The horn is sounding and red
overload light is constantly on.
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 booms in the stowed posi-
tion 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.
Remove weight from the platform un-
til the load is at or below rated ca-
pacity.
Remove weight from the platform un-
til the load is at or below rated ca-
pacity. Cycle machine power off, then
on. If alarm continues, system may
need recalibration.