Operator's Manual
First Edition • First Printing
Part No. 134207
T70 • T90 • T120
25
Operating Instructions
Starting the engine / generator set
1 Follow the setup procedure.
2 Make sure that the circuit breakers, located on
the control panel, are in the off position.
3 At the distribution panel side of the generator
set, locate the voltage selector switch and set
it to the desired range.
4 At the control panel side, locate the
toggle switch. Switch it to the on
position.
5 Press the manual button
(MAN) on the Cascade
controller to start the generator.
The generator will make three attempts at starting
before it must be reset with the switch.
Note: The installation and operations manual for
the Cascade CD101 auto-start controller is
available at www.fwmurphy.com
6 Allow the generator to warm up for 5 minutes
after starting.
Listen for unusual sounds or excess vibrations that
could signal problems and require immediate
shutdown of the unit. If unusual sounds are
detected, shut the unit down and contact Terex
Sevice at 1-800-433-3026.
7 Once the engine is running smoothly, monitor
the gauges as stated in the table below.
Oil Pressure
equal to or greater than 30 psi
Coolant Temperature
170-200 °F / 77-93 °C
DC Voltmeter
13-15 volts
(indicates that the diesel engine’s alternator is charging)
AC Voltmeter
reflects the proper voltage
selected
Refer to potentiometer (Voltage Adjustment ) on page 27.
AC Ammeter
0 (main breaker in off position)
Note: The ammeter will register the appropriate reading once
load is applied to the generator.
Never change the position of the voltage
selector switch while the generator is running. This
will result in immediate damage to the switch, the
generator, or the connected equipment. It may
result in serious injury to the operator.
Loading instructions
1 Shut down the generator set.
2 Press the off button on the Cascade control
panel. Switch toggle to the off position.
3 Connect the desired electrical apparatus to the
generator set.
4 Restart the engine and monitor the gauges as
tabulated in step 7 in starting the generator set
on this page.
5 Turn the required circuit breakers to the on
position.
6 Monitor the AC ammeter. If the needle deflects
severely to the right and stays there,
immediately turn the required generator circuit
breakers to the off position.
Note: Severe deflection of the ammeter indicates a
wiring problem or an overload problem. Continued
operation under this condition will cause damage
to the generator and/or connected apparatus.
The needle on the ammeter will deflect to the right
temporarily and then return to a normal reading if
the unit is operating properly.
Summary of Contents for T120C
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