C16x/C24x/C30x Operator’s Manual Drill - 65
Operate
Backream
After drill bit enters target trench, the bore hole may be enlarged by changing the drill bit to a reamer and
pulling it back through the initial bore.
Single pass
1. Shut down engine.
2. Remove drill bit and install applicable reamer.
3. Start engine and begin clockwise rotation.
4. Slowly back up machine while maintaining rotation.
5. When reamer exits approach trench, stop rotation immediately.
Multiple passes
1. Do a single pass.
2. Install drill bit.
3. Push drill string through bore. Do not rotate.
4. Do a single pass. At final pass, pull product. See “Pull Product” on page 66.
NOTICE: Incorrect use may damage components and increase wear.
• 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 bow of drill string at drilling
attachment can cause rod failure.
• Never have more than 30’ (9 m) of exposed rod outside the bore. Remove rods as necessary.
IMPORTANT: Always rotate clockwise during backreaming. Rotate counterclockwise only if drill bit
or reamer is blocked in bore.
IMPORTANT: If length of rod outside the bore reaches 30’ (9 m), remove rod section. See “Remove
Rod” on page 67.
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