Harbor Freight Tools ROTARY HAMMER 94944 - Manual (Page 15)

SKU 94944 PAGE 15
Problem Cause Action
Motor doesn’t rotate
when switched on. Disrupted power
Poor switch contact
Worn carbon brushes Check power supply
Have switch repaired
Replace brushes
Overheated gearbox Dull Drill Bit
Excessive use
Gears need grease Replace or sharpen the Drill Bit
Allow tool to cool down
Add grease to the gears
NOTE: Other than changing or cleaning the carbon brushes, all other internal repairs
should be done by a qualified service technician.
TROUBLESHOOTING
How to add grease to the gears
Every 100 hours of use it is recommended that you add wheel bearing grease to the
gears. To get access to the gears, you must remove Crank Case Cover (40) by removing
the six machine screws (37). Next rub wheel bearing grease on all the gears in the
chamber. Replace the Crank Case Cover (40) using the same machine screws (37) that
held it on. See the assembly diagram on page 17 to identify the parts.