LeeBoy 8510b, Руководство по эксплуатации и обслуживанию

Страница: 29 / 320

4
LeeBoy Model 8510B Conveyor Paver 4-3
Specifications
Screed
The Screed is the last part of the paver that contacts
the paved material. Operation of the screed is usually
done by the screed operator. Paving material is fed from
the hopper and conveyor to the augers to the front of
the Screed. The Screed has hydraulically controlled
extensions that move in and out to allow a wider paving
base from 8 ft up to 15 ft.
Screed heating is accomplished by either LPG burners,
or by electric heating elements mounted directly to the
wear plates.
The hydraulically driven vibrators mounted on the main
screed frame can be used to increase paving material
compaction.
Electrical System
The electrical system is powered by a 12-volt battery
mounted in the engine compartment located under
the covers on the right side of the paver forward of the
operator’s platform.
The battery produces 12 volts DC and maintains 1125
cold cranking amperes (CCA). An engine-mounted
alternator capable of at least 60 amperes charging
capacity keeps the battery charged during normal
operation. The battery charge rate can be monitored
using the voltmeter on the center operator dash panel.
Electrically heated pavers come equipped with a
generator. The generator is mounted on the paver under
the hopper floor near the right hand track.
The generator is hydraulically driven by the first section
of the rear pump on the engine pump stack. When the
paver is at full rpm, and the hydraulic system is at normal
operating temperature, the generator should operate
at a sufficient speed to produce between 220VAC and
240VAC.
All LeeBoy generators are equipped with an integrated
generator speed control manifold. This manifold should
not require adjustment, but if there is a need to fine tune
the generator speed, there is an adjustment on the
manifold (see
Generator Speed Tuning in Section 7).
Generator speed tuning should only be
done by an authorized LeeBoy Dealer.
All output power from the generator is passed through
the main breaker for safety. All output power is lost
when this breaker is in the “tripped” or “off” position. The
location of the generator main output breaker is shown
in Figure 6-22 .
The paver has heating controls to provide the necessary
connection and control of the output power from the
generator to the heating elements. It is necessary to
maintain all components of the heating controls system
in good working order to maintain safe and efficient
screed heating.
The Heating Control or Distribution/Control Box is
mounted near the middle of the screed and is easily
accessible to the screed operator when a heating cycle
is required.
There is a five second delay after the heat cycle is
initiated before the actual electric load is sent to the
heating elements from the generator. This delay is to
allow the generator to reach optimal operating speed
before the electrical load is required.
Once the heat cycle is started, a pre-programmed timer
controls the amount of time for output power from the
generator to go through the element connection supply
plugs coming out of the bottom of the Heating Control
Box to the heating elements.
Any element lead can be plugged into any supply plug
under the heating control/distribution box. All six plugs
are equally rated.
Each element is sized to fit properly in your screed, and
provide sufficient power to heat your screed plate to a
temperature that mix will not drag or stick to the lower
surface of the screed plate.
To know that the element is correct, you should read a
resistance between 28 ohms and 60 ohms (see
Testing
Element Relays in Section 7).
Return to
Last Viewed
Return to
Thumb Index