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3491 Mission Oaks Blvd.  •  PO Box 6009  •  Camarillo, CA 93011  •  1-888-866-5797

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 transportation 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.

Visit our website at: http://www.harborfreight.com

 Email our technical support at: [email protected]

For technical questions, please call 1-888-866-5797

Record Product’s Serial Number Here: 
Note: If product has no serial number, record month and year of purchase instead.
Replacement parts are not available.

Copyright

©

 2016 by Harbor Freight Tools

®

.  All rights reserved.  No portion of this manual or 

any artwork contained herein may be reproduced in any shape or form without the express 

written consent of Harbor Freight Tools.  Diagrams within this manual may not be drawn 

proportionally.  Due to continuing improvements, actual product may differ slightly from the 

product described herein.  Tools required for assembly and service may not be included.

Summary of Contents for HC91K1

Page 1: ...WARNING To prevent serious injury User must read and understand Owner s Manual SAVE THIS MANUAL When unpacking make sure that the product is intact and undamaged If any parts are missing or broken please call 1 888 866 5797 as soon as possible Reference 63381 63382 Owner s Manual Safety Instructions ...

Page 2: ...on while operating power tools may result in serious personal injury 2 Use personal protective equipment Always wear eye protection Protective equipment such as dust mask non skid safety shoes hard hat or hearing protection used for appropriate conditions will reduce personal injuries 3 Prevent unintentional starting Ensure the Trigger is in the off position before connecting to power source picki...

Page 3: ...tacting a live wire may make exposed metal parts of the power tool live and could give the operator an electric shock 3 Let bit cool before touching changing or adjusting it Bits heat up dramatically while in use and can burn you 4 If the drill bit jams release the Trigger immediately drill torque can cause injury or break bit 5 Maintain labels and nameplates on the tool These carry important safe...

Page 4: ...ngers increasing the risk of vibration related injury 3 Wear suitable gloves to reduce the vibration effects on the user 4 Use tools with the lowest vibration when there is a choice 5 Include vibration free periods each day of work 6 Grip tool as lightly as possible while still keeping safe control of it Let the tool do the work 7 To reduce vibration maintain the tool as explained in this manual I...

Page 5: ...ATION Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this manual including all text under subheadings therein before set up or use of this product Tool Set Up TO PREVENT SERIOUS INJURY FROM ACCIDENTAL OPERATION Make sure that the Trigger is locked and Battery Pack is removed before performing any procedure in this section Battery Charging Charge battery after unpacking an...

Page 6: ...hat will present a hazard while working General Operation 1 Lock Trigger then insert a fully charged Battery Pack making sure that it clicks into place securely 2 Set Direction Switch Forward Push Switch in on right side arrow pointing forward for clockwise rotation Reverse Push Switch in on left side arrow pointing backward for counter clockwise rotation Trigger Lock Push Switch to the center to ...

Page 7: ...Cleaning Maintenance and Lubrication 1 BEFORE EACH USE inspect the general condition of the tool Check for leaking swollen or cracked battery pack loose hardware misalignment or binding of moving parts cracked or broken parts and any other condition that may affect its safe operation 2 AFTER USE wipe external surfaces of the tool with clean cloth 3 Disconnect battery pack and store battery pack ch...

Page 8: ...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 def...

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