LeeBoy 8515E - Generator; Generator Capacitor

5-30 LeeBoy 8515E Conveyor Paver
Maintenance
Generator Generator
Voltage TestingVoltage Testing
The generator is hydraulically-driven and runs
continuously during operation to keep it cooled when
the load drops. When the hydraulic system is at normal
operating temperature and the engine is running at
maximum RPMs, the generator produces 240 VAC.
The generator voltage depends upon speed (RPMs),
increasing voltage as RPMs increase and decreasing
voltage as RPMs decrease. The voltage will decrease
signicantly if the engine speed is slower than 1800
RPMs.
NOTE: When testing the generator voltage ensure the
paver engine is at 1800 - 2200 RPMs, and the
hydraulic temperature is at normal operating
levels.
Test the generator voltage at the generator and at the
control box using the following procedure:
1. Use a volt meter to measure between the two main
input wires L-1 (black wire) and L-2 (white wire) at
the generator. (Figure 5-32) If you measure from
L-1 to the frame of the paver, or ground, the voltage
will be half the rated output of the generator.
2. Using the volt meter, measure between the black
and white input wires inside the control box on the
terminal block. The voltage should be the same as
what you measured at the generator.
If the voltage is lower, make certain the generator is
turning the correct speed by testing with a Hz meter or
photo tachometer. If the voltage is still low, contact your
authorized LeeBoy dealer for generator speed tuning
(see next section).
Figure 5-32. Generator
Generator Speed CheckGenerator Speed Check
The generator should never be
operated at a speed of 3800 RPMs or greater.
A voltmeter set to read frequency (Hz) can be used to
test generator speed. When the engine is running at
1800 - 2200 RPMs, the generator should operate at 60
Hz. Make certain that the paver engine is running at
1800 - 2200 RPMs and the hydraulic temperature is at
normal operating levels.
Generator CapacitorGenerator Capacitor
The generator capacitor controls and regulates voltage
while the machine operates. If the capacitor fails, the
voltage will drop below normal or no output at all. It is
located under the generator cover.
If experiencing a drop in voltage, replacing the capacitor
will help determine if the capacitor is at fault.
To perform this procedure:
1. Shut down the machine.
2. Detach the wires on top of the capacitor.
3. Remove the capacitor and replace with new one.
4. Reattach wires.