Minnich A-1C, Operators & Service Manual

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A-1C A-2C Operation Procedure
1. Lubricator – Make sure that the lubricator is full. See recommended lubricants.
2. Air Supply – Use a 3/4” hose to supply air to the drill unit.
3. Install the drill steel and bit into the drill.
4. Make sure that the air compressor is on.
5. Position the drill where the first hole is to be drilled and set the brake.
6. Remove the rail locking pin.
7. Lower the rail to the horizontal drilling position.
8. Make sure the rub strip is against the slab.
9. Using the feed control valve, feed the bit against the slab.
10. Using the drill control valve, turn the drill on and drill until the stop rod is against the stop pad.
11. Using the drill control valve, turn the drill off and then using the feed control valve, retract the drill from the hole.
NOTE: If the bit will not retract from the hole, feed the drill back into the hole and turn the drill on. With the drill
running use the feed control valve and retract the drill. Immediately shut the drill off one the bit is clear of the hole.
DO NOT HIT THE DRILL SLIDER TO RETRACT THE BIT FROM THE HOLE. THIS WILL DAMAGE THE
SLIDER!
12. Once the hole is drilled, disengage the brake and move the unit to the next hole location, engage the brake, and
then repeat steps 8 – 11.