Maintenance - Craftsman 320.66810 Operator's Manual

TIGHTENING TORQUE
The tightening torque depends on the duration of the impacting/tightening
action. The highest tightening torque is achieved after approx. 3 to 5 seconds of
impacting/tightening action.
The torque build-up depends on the following factors:
• The hardness of the material in the bolts/nuts.
• The type of washer (disk washer, spring washer, seal).
The hardness of the material (s) to be joined by the fastener.
The lubricants (if any) at the surface of the junction.
Examples:
The maximum torque is reached after a relatively short impacting/tightening
interval when joining metal to metal with a disk washer.
A moderate interval of impacting/tightening action is required when joining metal
to metal where a spring-ring washer, disk-spring washer, stud bolt, or bolt/nut
with conical seats are used.
A longer interval of impacting/tightening action is necessary to arrive at the
maximum tightening torque when joining metal to wood or insulation material.
WARNING: To avoid serious personal injury, always remove the battery
pack from the tool when cleaning or performing any maintenance.
_, WARNING: When servicing, use only identical Craftsman replacement parts.
Use of any other parts may create a hazard or cause product damage.
_k WARNING: It is not recommended to use compressed dry air as a cleaning
method for the Impact Wrench. If cleaning with compressed air is the only method
available, always wear safety goggles or safety glasses with side shields when using
compressed air to clean the tool. If the operation is dusty, also wear a dust mask.
GENERAL MAINTENANCE
Avoid using solvents when cleaning plastic parts. Most plastics are susceptible
to damage from various types of commercial solvents and may be damaged by
their use. Use clean cloths to remove dirt, dust, oil, grease, etc.
WARNING: Do not at any time allow brake fluids, gasoline, petroleum-based
products, penetrating oils, etc. to come in contact with plastic parts. Chemicals can
damage, weaken or destroy plastic which may result in serious personal injury.
WARNING: When servicing, use only identical Craftsman replacement parts.
Use of any other parts may create a hazard or cause product damage. To ensure
safety and reliability, all repairs should be performed by a qualified service
technician at a Sears Service Center.
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