LeeBoy 8510E, Руководство по эксплуатации, обслуживанию и запасным частям, Страница: 111 / 444

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LeeBoy Model 8510E Conveyor Paver 5-21
Maintenance
Generator
Voltage 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
significantly 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 5-26)
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 5-25. Plug
Heating Elements
Each heating element is sized to fit properly and provide
sufficient heat to the screed plate. Elevated temperature
prevents mix from sticking to the lower surface of the
screed plate.
An element assembly consists of four main components:
• The element.
• The wire protector adapter.
• The wire protector.
• The two-pin wire plug at the end of the element
protector.
Each element is covered by a thin strip of insulation
to keep heat from escaping. A support bar and shield
protects the element assembly.
Each element is clamped onto the screed plate to
provide a positive and efficient connection.
Enough
pressure should be applied to the element assembly
to sufficiently hold it securely against the screed plate
surface.
To remove an element:
1. Remove top cover from the extension screed plate.
2. Loosen all the clamping studs over the element.
3. Remove and replace element.
4. After tightening the clamping stud, lock the clamp by
tightening the stud jam nut.