Bush Hog CBH80 - Manual (Page 15)

General Operations
FILLING THE BUCKET
Control the bucket attitude throughout the digging cycle to
keep teeth at the proper angle for best penetration. This
will minimize dragging and scraping the bucket through the
ground.
When digging in hard-packed soil, bucket penetration can
be increased by applying down pressure with the boom
while crowding in and curling the bucket. If the crowd
action “stalls” it may be necessary to apply lift occasionally
during the digging cycle to correct the bucket depth.
To obtain a cleaner trench and avoid the buildup of material
directly in front of the backhoe, crowd out and completely
curl the bucket while starting to lift it from the excavation. In
this way, excess material will fall back into the excavation.
DUMPING THE BUCKET
To dump the bucket at the end of the digging cycle, lift the
bucket clear of the trench while crowding it out and swing-
ing it to the spoil pile.
As the pile is approached, dump the bucket. When the
bucket is empty, the dipperstick and bucket are in position
to resume digging upon return to the trench.
IMPORTANT: Avoid constant jarring or hammering-type
contact between the spoil pile and the loaded bucket, as
this may cause premature wear to the backhoe pins and
bushings.
TRENCHING BETWEEN A BUILDING AND
OPEN EXCAVATIONS
Start the trench at the building. Trench out halfway to the
excavation. Then start trenching from the excavation to the
first trench. Dig toward the first trench until there is just
enough room to move the unit out between the two tren-
ches.
Position the unit so the backhoe swing post is over the
centerline of the trench connection. Dig with the backhoe at
extreme swing positions, and in as close to the stabilizers
as possible. Pile the spoil on the opposite side of the tren-
ches.
Position the unit forward with the lift and crowd levers so
the two trenches can be connected. Pile the spoil on the
opposite side of the trench.
13