LeeBoy 8608 - Heating Elements; Generator Speed Check

55
Maintenance
LeeBoy 8608 Commercial Paver 5-29
2. Using an ohm meter, test the resistance through the
element between the two pins in the plug. (Figure
5-26)
NOTE: You do not have to test the plug attached to
the lower side of the control box.
3. Before replugging the element, check each wire
pin with an ohm meter test lead, placing the lead
on a steel section of the screed frame. If there is
any continuity through the element to the frame, the
element must be replaced.
DO NOT operate an element with a
known electrical shortage. Replace faulty elements
and wiring immediately.
Figure 5-26. Plug
Table 5-4.Element Resistance Table
Item STD Legend Screed
Generator Size (kW) 14.4 kW
Breaker Size 60 Amp
Main Screed Elements (2)
Wattage Per Element 3000 W
Total Wattage 6000 W
Resistance per Element 19 - 32 Ω
Screed Extension Elements (2)
Wattage Per Element 1500 W
Total Wattage 3000 W
Resistance per Element 52.5 - 62.6 Ω
Heated Endgate Elements (2) **
Wattage Per Element 500
Total Wattage 1000
Resistance per Element 88 - 108 Ω
** Optional item.
Heating ElementsHeating Elements
Each heating element is sized to t properly and provide
sufcient 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 efcient connection. Enough
pressure should be applied to the element assembly
to sufciently 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.
Generator Speed CheckGenerator Speed Check
The generator should never be
operated at a speed of 2100 RPMs or greater.
A voltmeter set to read frequency (Hz) can be used
to test generator speed. When the engine is running
at 2100 RPMs, the generator should operate at 60
Hz. Make certain that the paver engine is running at
2100 RPMs and the hydraulic temperature is at normal
operating levels.