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Page 13SKU 41983
For technical questions, please call 1-800-444-3353.
TROUBLESHOOTING
Problem Possible Causes Probable Solutions
Motor does not rotate
switch on power
supply.
Disrupted power supply.1.
Poor contact at the switch.2.
Armature or field coil burnt.3.
Breakage of the Stator coil.4.
Carbon Brushes worn out.5.
Check power supply.1.
Repair switch.2.
Change coil.3.
Replace Stator Coil.4.
Replace Carbon Brushes.5.
Abnormal noise from
motor; does not rotate
or rotates slowly.
Overload of motor caused by
excessive drilling depth or pressure.
Reduce drilling depth or pressure.
Decrease force.
Partial short circuit Partial short circuit or open circuit at
Armature.
Repair or change Armature.
Main voltage too low Main power voltage too low. Adjust main power voltage.
Gearbox becomes too
hot.
Overload, dull bit.1.
Damp coils.2.
Incorrect fitting.3.
Decrease in voltage.4.
Reduce load, sharpen bit.1.
Dry coils.2.
Repair or change armature.3.
Adjust voltage.4.
Sparking Short circuit or break at Armature.1.
Surface of Armature not smooth 2.
and clean.
Repair Armature.1.
Inspect and clean Armature.2.
LIMITED 90 DAY WARRANTY
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and
durability standards, and warrants to the original purchaser that this product is free from defects in
materials and workmanship for the period of 90 days from the date of purchase. This warranty does
not apply to damage due directly or indirectly, to misuse, abuse, negligence or accidents, repairs
or alterations outside our facilities, criminal activity, improper installation, normal wear and tear, or
to lack of maintenance. We shall in no event be liable for death, injuries to persons or property, or
for incidental, contingent, special or consequential damages arising from the use of our product.
Some states do not allow the exclusion or limitation of incidental or consequential damages, so
the above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU
OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF
MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with trans-
portation charges prepaid. Proof of purchase date and an explanation of the complaint must
accompany the merchandise. If our inspection verifies the defect, we will either repair or replace
the product at our election or we may elect to refund the purchase price if we cannot readily and
quickly provide you with a replacement. We will return repaired products at our expense, but if we
determine there is no defect, or that the defect resulted from causes not within the scope of our
warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary
from state to state.
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353