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36
Section 2 - Rumble Hog Systems
pins by raising the cutter. Then rotate the cutter
slightly until the pins can be inserted in the holes.
2.8 cutter
Overview
The cutter assembly and chassis is mounted on
the lifting arm. It can be operated in two modes,
rumble stripping or planing. Cut alignment is
controlled manually by controls in the cab or au-
tomatically by the auto guidance system. Special
teeth mounted on a hydraulically powered rotating
drum do the cutting.
Hydraulically powered, rotating eccentrics cause
the cutter to plunge at a specific depth with each
rotation in rumble stripping mode. Gas charged
shock absorbers and springs connected to the
hydraulic motors that drive the cutting drum
absorb the spike in torque each time the cutting
teeth contact the pavement during operation.
The operator can lockout the eccentric to prevent
the drum from plunging for planing operations.
Adjustable gauge wheels on the chassis control
cutting depth.
Hydraulic skip cylinders raise or lower the cutter
to skip cuts in rumble strip mode or to temporally
suspend planing. A variety of cut widths and pat-
terns can be programmed into the digital controller
by the operator.
The RPM of the eccentric is synchronized with the
hydrostatic truck drive system. This Maintains
the cut width and pattern when truck speed is
increased or decreased during operation.
Drum and Teeth
The cutter drum rotates independently from the
eccentric and is powered by two direct drive
hydraulic motors on each end of the drum axle.
The hydraulic motors are powered by a dedicated
hydraulic pump driven by the OMSI PTO. The cut-
ter teeth are bolted in staggered sockets on the
circumference of the drum. The teeth, bolts and
wedges should be monitored closely for wear and
proper torque.
Cutting width can be changed by removing or
adding teeth. Rounded teeth are used for cutting
rumble strips. Flat teeth are used for planing.
The water system supplies pressurized water to
spray nozzles mounted to the cutter chassis just
Cutter Unit Raised
Typical Cutting Tooth
Cutting Teeth & Drum
Содержание RH7500
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