Koyker KB660 Owner's Manual page 13

OPERATING INSTRUCTIONS
BASIC DIGGING TECHNIQUE
When starting an excavation, make the first cut of each section shallow, being careful to follow the exact
layout of the excavation. The reason for shallow cut is to minimize damage to the sod and to facilitate
replacement. These first cuts are also important because they will act as guides for the remaining cut, thus
getting the first few cuts as accurate as possible will help in keeping all future cuts accurate.
When digging with the backhoe, extend the boom, dipper and bucket out, away from the operator. Lower
the boom and dipper to start the digging process. The bucket teeth should be at a 30 to 45 degrees entry
angle. As the digging starts, curl the bucket until the cutting is level with the horizon. Crowd the bucket in
toward the operator, manipulate the boom lever to keep the bucket level. As the bucket moves toward the
operator, manipulate the boom lever to keep the cut lever. At the end of the digging cycle, crowd the
dipper in and completely curl the bucket while lifting it from the excavation. Once you have cleared the
excavation, swing the bucket to the spoil pile. Start to dump bucket before the pile is approached. Once
the bucket is empty, swing the unit back to the excavation, positioning the bucket and dipper for the next
cut in the process. The whole digging process should be one smooth cycle that is repeated until the
excavation is completed.
When the excavation has been dug to
within six inches of the finished bottom,
clear and touch up the sides of the
excavation. Use the flat sides of the
bucket to scrape off any high spots.
Dislodge any exposed rocks if they seem
loose. When finishing the walls, finish
the far wall by curling the bucket out,
crowing the dipper out, and forcing the
bucket down. To finish the closest wall,
lift the bucket up and curl it in.
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