D20x22 Series II Navigator HDD
Operation 50-21
B
EFORE
THE
B
ORE
WARNING:
Keep spectators away.
WARNING:
Do not work in trench with unstable sides which could cave in. Specific
requirements for shoring or sloping trench walls are available from several sources
including federal and state O.S.H.A. offices. Be sure to contact suitable authorities for
these requirements before working in the trench.
DANGER:
Wrench on rotating drill string can strike you. Death or serious injury will
result. Always use the power vise to make or break joints at the machine.