Brush Replacement; General Maintenance - Craftsman 320.27990 Operator's Manual

_1, WARNING: To avoid serious personal injury, always disconnect the tool plug
from the power source before cleaning or performing any maintenance.
_1, WARNING: When servicing, use only identical Craftsman replacement parts.
Use of any other parts may create a hazard or cause product damage.
A_, WARNING: It is not recommended to use compressed dry air as a cleaning
method for the Impact Wrench. If cleaning with compressed air must be used,
always wear safety goggles or safety glasses with side shields. If the operation is
dusty, also wear a dust mask.
BRUSH REPLACEMENT (Fig. 4)
The impact wrench is equipped with externally
accessible brushes.
Replacement brush sets are available through
a Sears Parts & Repair Service Center.
To replace:
1.
2.
3.
4.
Unplug the tool.
Loosen the brush caps with a slotted
screwdriver and remove them from the
tool.
Fig. 4 Brush Brush
Assembly Cap
_ Brush
Brush _ Assembly
Cap :_
Remove the brush assemblies.
L_
Check for wear. Replace both brush
assemblies when the carbon brush on either is less than 1/4 in. long.
NOTE: Do not replace the brush on one side without replacing the other.
5. Reassemble using new brush assemblies. Make sure that the curvature of
the brush matches the curvature of the motor and that the brush moves
freely in the brush tube, being certain to fit the two metal "ears" into the
brush tube.
6. Tighten all brush caps securely. Do not over-tighten. The tool should be
allowed to "RUN IN" (run at no-load without a bit) for 5 minutes before use to
seat the new brushes properly.
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.
A_, WARNING: Do not at any time let 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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