Case 845B VHP Operator's Manual page 98

NOTE: Remove the scarifier teeth before trying to open
or clean a trench.
When starting a ditch, position moldboard so that one cut-
ting edge (right or left) is directly behind and 3" (76 mm)
below the front wheel, with the other end of the blade as
high as possible.
Cast the material between the rear wheels. The first cut
should be light enough to maintain control of the grader
and cut a straight ditch line. When the material accumu-
lates under the machine, it should be cast aside before
taking another cut in ditch line.
Deeper ditch requires more side casting of material.
4-8
CHAPTER 4 – OPERATING INSTRUCTIONS
If a "V" ditch is required, each side of the ditch must be cut
alternately to permit the front and rear wheels to travel in
the center of the ditch.
When it is necessary to cast material over the edge of
a fill, side shift the moldboard to its extreme, so that the
grader wheels are not on edge of fill. The weight of the
machine could cause the edge to give way endangering
the operator. Articulation also helps in this situation.
When grading a road shoulder, it may be necessary to
grade around objects, such as mailboxes abutments or
utility poles. The moldboard can be side shifted around
the object without changing the grade level.