TM 5-3805-280-10
Drilling
Dust collector on. Dust hood down.
Flushing air on.
Feed down without hammering till reaching
end of collar (solid ground).
Move drill lever to auto and start drilling.
When sampling or completion of hole, turn
dust collector off to purge filters (if machine is so
equipped).
SETTING OF BIT ROTATION
The bit rotation speed can not be adjusted directly
from the operator's control panel.
To modify the bit rotation, it is necessary to act on
the rotation flow regulator.
Drifter rotation setting
7-52
