Terex T25 - Page 28

Operating Instructions and Parts Manual
28 Terex T25I and T45I Super Quiet Generator
June 2006
REV A
• After performing the initial checks above,
remove the field wires from the voltage
regulator (F1 or X is positive and F2 or XX is
negative). Connect the battery + to the F1 or X
wire and battery - to the F2 or XX wire. Start the
engine and check for the rated voltage.
Hooking this up incorrectly will reverse
polarity and could damage the voltage
regulator and /or generator end. This check
should correct any voltage problems. If your
voltage does not come up to the rated voltage,
this indicates an internal problem with the
generator end. The output should be close to
proper voltage. Also, if the unit comes up to
voltage, check for even reading across the lines
if they are not this would mean you probably
have a problem with the wiring of the switch or
generator. If the generator voltage reads
correctly you know there is not a problem with
the generator end. Your problem is more than
likely with the voltage regulator. In this case,
you should contact the TEREX service
department.
• If the voltage is uneven between the legs when
you apply 12 volts to the field wires you need to
recheck your wiring connections. (If you can
not find the problem hard wire the
generator!) After you have the field wire
connected start the unit again and check your
output voltage. It may still be necessary to flash
the fields to restore residual voltage. This needs
to be done with the unit off and the field wires
removed. (Do not flash the regulator, flash
the field wires)
• As with any electrical device use extreme
caution when working around a running
generator it could cost you your life. Observe
proper polarity when working with the regulator
so you don’t break something that is not broken
to begin with, and if you are ever in doubt, ask.
INSTALLATION AND ANY WORK PERFORMED
ON THIS UNIT SHOULD BE DONE ONLY BY A
QUALIFIED ELECTRICIAN.
PROCEDURE FOR CHANGING
THE MAGNETIC PICK-UP
SENSOR
• Make sure generator is turned off and e-stop is
engaged before opening control panel.
• Locate the two wires going to the speed
controller mounted on the inside of the control
pan marked MPU + and MPU -.
• Both wires are isolated in their own shielded
cable.
• Once the wires are loose, pull them through the
back of the control box until they are completely
free from all ty-wraps and wire harnesses.
• Unscrew and remove the old sensor.
• Align the flywheel tooth to the center of the
sensor hole.
• Install new sensor until it bottoms out on
flywheel tooth and then back it off ¼ turn.
• To insure proper installation, the sensor must
THIS EQUIPMENT USES HIGH VOLTAGE CIR-
CUITS CAPABLE OF CAUSING SERIOUS IN-
JURY OR DEATH! EXCERCISE EXTREME CAU-
TION AROUND ANY ELECTRICAL COMPO-
NENT WHEN OPERATING THIS UNIT.
INSTALLATION AND ANY WORK PERFORMED
ON THIS UNIT SHOULD BE DONE ONLY BY A
QUALIFIED ELECTRICIAN.
PROCEDURE FOR TESTING
GENERATOR WITH NO OUTPUT
(Cont.)
ELECTRICAL TROUBLESHOOTING (Cont.)