RUMBLE HOG RH7500, Operation Manual

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Section 2 - Rumble Hog Systems
Spring & Gas Charged Shock Absorber
Cutter Skip Cylinder
Cutter Skip Cylinders
The hydraulic cylinders that lift the drum during
rumble cutting or planing operations are separate
from the cylinders that raise the lift arm and cutter
chassis. The skip cylinders are located at the rear
of the cutter chassis and powered by the implement
hydraulic pump driven by the TRUCK PTO. They are
used to temporarily lift the drum completely off the
pavement during rumbling or planing operations.
In rumble strip mode, the controller can be pro-
grammed to raise the drum every x number of cuts,
skip x number of cuts, then lower the drum back to
the pavement to create a pattern. The drum can
also be raised manually by buttons in the controller,
on the joystick or the wireless remote control to
raise the drum to momentarily stop cutting while
crossing bridges, intersections, driveways, etc.
Adjustable linkages on each cylinder ram provide
adjustment to level the cutter if necessary. Refer to
the Lubrication & Maintenance section for instruc-
tions on the adjusting the skip cylinders.
Torque Springs And Shock Absorbers
A spring and gas charged shock absorber is con-
nected to a linkage attached to each cutting drum
drive motor. The spring and shock absorber absorb
the spike in torque that occurs when the cutting
teeth contact the pavement.
Gauge And Trim Wheels
Rumble Mode Wheels
There are two trim wheels and four gauge wheels
on the bottom of the cutter chassis. The forward
wheels are the trim wheels that function as the
pivot for the rear gauge and skip cylinder wheels.
The rear gauge wheels support the cutter chassis
at a preset height above the pavement. Chassis
height sets the depth for each cut as the eccen-
tric plunges the cutter into the pavement (cutting
depth). Cutting depth is set by adjusting the rear
gauge wheels up or down.
The two gauge wheels just forward of the rear
wheels are connected to the skip cylinders that
raise the cutter to skip rumble cuts.
Optional skid plates can be bolted to the chassis
behind the gauge wheels. The skids are designed
to span rumble strips to prevent gauge wheels
from dropping into the cuts when wheels must roll
in the cut pattern.
Trim & Gauge Wheels - In Rumble Mode