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Page 12SKU 41983
For technical questions, please call 1-800-444-3353.
INSPECTION, MAINTENANCE, AND CLEANING
WARNING! Make sure the Power Switch of the tool is in its “OFF” position and that the
tool is unplugged from its electrical outlet before performing any inspection, maintenance,
or cleaning procedures.
BEFORE EACH USE, inspect the general condition of the tool. Check for loose screws,
misalignment or binding of moving parts, cracked or broken parts, damaged electrical
wiring, and any other condition that may affect its safe operation. If abnormal noise or
vibration occurs, have the problem corrected before further use. Do not use damaged
equipment.
CLEANING: Regularly clean the work surface with a dry brush or clean cloth. Keep moving
parts lightly greased. Always keep the Motor and vent areas free of dust and debris.
LUBRICATION: Use the enclosed spanner wrench to unscrew the Seal Cap (18) located
on top of the housing. Add the enclosed grease and replace and tighten the Seal Cap.
CHANGING THE CARBON BRUSHES:
Using a small standard screwdriver, remove the Brush Covers (81). When you remove
the Brush Caps, the Carbon Brush Holder (83) may spring out. Do not lose the Carbon
Brushes. If the Brush Holder does not spring out, gently remove it by using the tip of your
screwdriver. Examine the surface of each brush. The surface should be smooth and
clean. If scratch marks appear, or if the brush is broken, replace the brush immediately
with an approved replacement brush from Harbor Freight Tools.
If the brush is not damaged but is only dirty, you may clean it off with a pencil eraser.
Gently rub with the eraser until the dirt has been removed. Remove any eraser dust
which may have accumulated during cleaning.
Re-install each Carbon Brush (82) by inserting it back into the Brush Holder (83). Screw
the Brush Cover (81) back into the Brush Holder and tighten.
MAINTENANCE CHART
Maintenance Type
Before
Use
After
Use
After Every 50
Hours of Use
After Every 100
Hours of Use
Inspect tool for damage
X
Clean outside and lubricate
exposed moving parts
X
Lubricate*
X
Replace Carbon Brushes
X
*The Rotary Hammer is pre-greased from the factory. Lubrication is only needed starting after approximately 50 working hours.
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