LeeBoy 8616 - Generator Voltage Testing; Generator Speed Tuning

7-16 LeeBoy Model 8616 Conveyor Paver
Maintenance
Generator Speed Tuning
Generator speed tuning should only be
done by an authorized LeeBoy Dealer.
A volt meter set to read frequency (Hz) can be used to
test the speed of the generator. When the paver engine
is at 1400 rpm, the generator should operate at 58 Hz to
62 Hz, or a speed of 3480 rpm to 3720 rpm. If generator
speed drops below 3480 rpm, then voltage output and
performance of the heating system will also decrease
signicantly.
The generator should never be allowed
to operate at a speed of 3800 rpm or greater.
Generator damage will occur and may void your
existing warranty. If your speed is above 3800 rpm,
stop the set immediately.
NOTE: The generator and electrical system is designed
to work within the range of 58 Hz to 62 Hz. It
does not need to be set to exactly 60 Hz.
NOTE: When testing the generator speed, make certain
that the paver engine is at 1400 rpm and the
hydraulic temperature is at normal operating
levels.
To Measure Generator Speed:
1. Remove back panel from generator housing to
access the rear of the generator.
2. Use volt meter, set to read frequency (Hz), to
measure between the two main input wires L1 and
L2 (Figure 7-13).
NOTE: A photo tachometer may also be used to check
the speed of the generator at the motor coupling
by removing the motor coupling shield.
Always replace shields and panels
when nished testing.
3. Note that 60 Hz is exactly 3600 rpm. For every
single Hz above 60 an increase of 60 rpm can be
added to 3600 rpm. For every single Hz below 60
Hz a decrease of 60 rpm can be subtracted from
3600 rpm.
Example: 60 Hz is 3600 rpm. A reading of 62 Hz would
be 3720 rpm. A reading of 58 Hz would be 3480 rpm.
NOTE: The integrated ow control manifold is pre-set
and will maintain the generator at it’s proper
speed if the correct amount of oil is supplied to
the set. If the temperature of the hydraulic system
rises above 160°F, some slippage may occur
through the gear set of the generator motor, and
the generator may slow slightly.
Generator Voltage Testing
The LeeBoy Model 8616 Conveyor Paver generator is
hydraulically driven. When the paver engine is at
1400 rpm and the hydraulic system at normal operating
temperature, the generator should produce between
220VAC and 240VAC.
The voltage of the generator depends on speed
(rpm). The voltage increases as rpm increases, and
decreases as rpm decreases. The voltage will decrease
signicantly if generator speed is slower than 3480 rpm.
NOTE: When testing the generator voltage ensure the
paver engine is at 1400 rpm and the hydraulic
temperature is at normal operating levels.
To test the generator voltage at the generator:
1. Use volt meter to measure between the two main
input wires L1 and L2 (Figure 7-13,1,2). If you
measure from L1 to the frame of the paver, or
ground, the voltage will be half of the rated output of
the generator. The voltage should be the same as
measured at the control box.
2
1
Generator Testing View
Figure 7-13
1 - L1 (Black Wire)
2 - L2 (White Wire)
To test the generator voltage at the control box:
1. Use volt meter to measure between the two main
black and white input wires located inside the
control box on the terminal block similar to one in
Figure 7-13. The voltage should be the same as
measured at the generator.
If your voltage at this point is lower, make certain the
generator is turning the correct speed by testing with a
Hz meter or photo tachometer as described in the next
section, Generator Speed Tuning.
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