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OPERATION
RIPPER OPERATION
EFFECTIVE METHOD OF USE
The optimum digging angle for the shank is when the shank is
tilted back for approximately 5 deg. to the ground (ripping angle:
45 deg. to 50 deg.).
In comparatively soft rock (seismic velocity: 1,500 m/s or
below), it is also possible to perform ripping with the shank tilted
to the rear.
On comparatively hard rock, if ripping is performed with the
shank tilted to the rear, there will be excessive wear of the point
of tip (1), and the self-sharpening ability will be lost.
During ripping operations, if the shoes slip because of boulders
or resistance from the bedrock, use the tilt cylinder.
When picking up a stone, advance the machine at a fixed gear
speed (F1 or F2).
REMARK
When raising boulders or digging up rockbed, do not put the transmission in neutral. If the transmission is in
neutral, the reaction of the tilt cylinder will push the machine back. Always operate the machine with the
transmission in FORWARD.
Choosing a suitable ripper point to match the type of rock is one of the most important elements in using the ripper
effectively.
Ripper points are available for different types of rock, so select the most suitable ripper point from the list. For
details, see "PROCEDURE FOR SELECTING RIPPER POINT (PAGE 6-4)".
DIGGING UP BOULDERS OR ROCKBED
During ripper operations, if stubborn boulders or rockbed cause the
travel speed to become slower, operate the tilt cylinder to dig up
the boulder/rockbed.
OPERATION
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