12
Ductile material such as metal or wood is drilled effi 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 lubricant to prolong bit
life and reduce the amount of force required to drill effec-
tively.
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 fl uid at low engine speed. When using the nor-
mally recommended fl uids, fl uid temperature should be at
or above 50
o
F/10
o
C (400 ssu/82 centistokes) before use.
Damage to the hydraulic system or wrench can result from
use with fl uid that is too viscous or too thick.
OPERATION
Summary of Contents for DL07
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