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DL07 User Manual ◄ 11
Ductile material such as metal or wood is drilled ef-
ciently when a steady down force is applied to the drill
center to cause the bit to slice chips of material from the
hole bottom. When drilling in metal, use a cutting lubri-
cant to prolong bit life and reduce the amount of force
required to drill effectively.
Large drill holes are more productively created from
small drill holes. Drill bits are incrementally selected to
enlarge the hole until the desired hole size is obtained.
Each bit selected must always be too large to thread and
jam into an existing hole; otherwise the bit may break
and endanger the operator.
COLD WEATHER OPERATION
If the wrench is to be used during cold weather, preheat
the hydraulic uid at low engine speed. When using the
normally recommended uids, uid temperature should
be at or above 50 °F/10 °C (400 ssu/82 centistokes) be-
fore use.
Damage to the hydraulic system or wrench can result
from use with uid that is too viscous or too thick.
OPERATION