LeeBoy 8616B - Element Resistance Testing; Heating Elements

LeeBoy 8616B Conveyor Paver5-16
Element Resistance Testing
The breakers are wired into each leg of each element.
If an element has a fault, either in the wiring, or in the
element itself, the breaker will trip and power will no
longer be applied to that leg of the element.
When a breaker in the control box has “tripped,” there
may be a problem in the wiring or an element in the
circuit.
The breakers can be manually reset by depressing the
trip button back into place when they are extended. If
the breaker still does not reset, you need to test or
possibly replace an element.
If the element is functioning correctly, you should read
a resistance between 25 and 35 ohms when testing. A
faulty element will read “open” or show little resistance
(less than one ohm), indicating a shortage through the
element.
To test the element:
1. Disconnect elements one at a time from the
connection point on the lower side of the control
box.
2. Using an ohm meter, test the resistance through the
element between the two pins in the plug.
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 shortage. Replace faulty elements and wiring
immediately.
Heating Elements
Each element is sized to t properly and provide
sufcient power to heat your screed plate to a
temperature that 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:
4. Remove top cover from the extension screed plate.
5. Loosen all the clamping studs over the element.
6. Remove and replace element.
7. After tightening the clamping stud, lock the clamp by
tightening the stud jam nut.