Cx Series Operator’s Manual Drill - 65
Operate
Backream
Sometimes it is necessary to drill a pilot hole first, then enlarge the hole to accommodate larger product.
As a general rule, the final hole should be 1.5 times larger than the diameter of the product being
installed. The number of passes needed depends on soil conditions.
1. Shut off machine.
2. Remove drill bit and install appropriate reamer.
3. Start engine.
4. Begin clockwise rotation.
5. Slowly drive in reverse while maintaining rotation. When reamer exits approach trench, stop rotation
immediately.
NOTICE:
• Do not try to increase hole size too much in one pass. Make several passes using successively larger
reamers.
• Keep drill string straight and aligned with drilling attachment. Sharp bends can cause rod failure.
• Ensure no more than 30’ (9m) of exposed rod is outside the bore. Remove rods as necessary. See
“Remove Rod” on page 67.
NOTICE: Always rotate clockwise during backreaming. Rotate counterclockwise only if reamer
is blocked in bore.
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