Drill Master 90798 Operating Instructions Manual

IMPACT WRENCH

®

18 VOLT - CORDLESS

Model 90798

OPERATING INSTRUCTIONS

3491 Mission Oaks Blvd., Camarillo, CA 93011

Visit our Web site at: http://www.harborfreight.com

Copyright© 2003 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.

For technical questions, please call 1-800-444-3353.

PRODUCT SPECIFICATIONS

Item Description

Power Source 18 VDC Battery, 1.3 Ah.

Battery Lock: Yes (Clips).
Cell Type: Ni-Cad /1300 mAh.
Cell Count: 15 Cells.
Charge Time: 3-5 Hours.
Plug Type: 2 Prong.

Charger Input 120 VAC / 60 Hz.

Charger Output 24 VDC / 400 mAMPs, 9.6 VA

Tool Drive 3/8” w/ Spring Ball & Clip.

Maximum Torque 87 FT./LBS.

Tool Speed 1449 RPM / 1700 BPM.

Socket Size 1/2” (Qty. 1)

Weight 5.60 Pounds.

SAVE THIS MANUAL

You will need this manual for the safety warnings and precautions,
assembly, operating, inspection, maintenance and cleaning procedures,
parts list and assembly diagram. Keep your invoice with this manual.
Write the invoice number on the inside of the front cover. Keep this
manual and invoice in a safe and dry place for future reference.

GENERAL SAFETY RULES

WARNING!

READ AND UNDERSTAND ALL INSTRUCTIONS

Failure to follow all instructions listed below may result in

electric shock, fire, and/or serious injury.

SAVE THESE INSTRUCTIONS

WORK AREA

1. Keep your work area clean and well lit. Cluttered benches and dark areas

invite accidents.

2. Do not operate power tools in explosive atmospheres, such as in the
presence of flammable liquids, gases, or dust. Power tools create sparks

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REV 12/03

which may ignite the dust or fumes.

3. Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control. Protect others in the work area from
debris such as chips and sparks. Provide barriers or shields as needed.

ELECTRICAL SAFETY

4. Grounded tools must be plugged into an outlet properly installed and grounded
in accordance with all codes and ordinances. Never remove the grounding
prong or modify the plug in any way. Do not use any adapter plugs. Check
with a qualified electrician if you are in doubt as to whether the outlet is properly
grounded. If the tools should electrically malfunction or break down, grounding

provides a low resistance path to carry electricity away from the user.

5. Double insulated tools are equipped with a polarized plug (one blade is wider

than the other). This plug will fit in a polarized outlet only one way. If the plug
does not fit fully in the outlet, reverse the plug. If it still does not fit, contact a
qualified electrician to install a polarized outlet. Do not change the plug in

any way. Double insulation eliminates the need for the three wire grounded

power cord and grounded power supply system.

6. Avoid body contact with grounded surfaces such as pipes, radiators, ranges,
and refrigerators. There is an increased risk of electric shock if your body is
grounded.

7. Do not expose power tools to rain or wet conditions. Water entering a power
tool will increase the risk of electric shock.

8. Do not abuse the Power Cord. Never use the Power Cord to carry the tools or

pull the Plug from an outlet. Keep the Power Cord away from heat, oil, sharp
edges, or moving parts. Replace damaged Power Cords immediately. Damaged

Power Cords increase the risk of electric shock.

9. When operating a power tool outside, use an outdoor extension cord marked
“W-A” or “W”. These extension cords are rated for outdoor use, and reduce the
risk of electric shock.

PERSONAL SAFETY

10. Stay alert. Watch what you are doing, and use common sense when operating
a power tool. Do not use a power tool while tired or under the influence of
drugs, alcohol, or medication. A moment of inattention while operating power

tools may result in serious personal injury.

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11. Dress properly. Do not wear loose clothing or jewelry. Contain long hair.
Keep your hair, clothing, and gloves away from moving parts. Loose clothes,

jewelry, or long hair can be caught in moving parts.

12. Avoid accidental starting. Be sure the Power Switch is off before plugging in.
Carrying power tools with your finger on the Power Switch, or plugging in power
tools with the Power Switch on, invites accidents.

13. Remove adjusting keys or wrenches before turning the power tool on.
A wrench or a key that is left attached to a rotating part of the power tool may result
in personal injury.

14. Do not overreach. Keep proper footing and balance at all times. Proper footing
and balance enables better control of the power tool in unexpected situations.

15. Use safety equipment. Always wear eye protection. Dust mask, non-skid safety
shoes, hard hat, or hearing protection must be used for appropriate conditions.

TOOL USE AND CARE

16. Use clamps (not included) or other practical ways to secure and support the
workpiece to a stable platform. Holding the work by hand or against your body is

unstable and may lead to loss of control.

17. Do not force the tool. Use the correct tool for your application. The correct
tool will do the job better and safer at the rate for which it is designed.

18. Do not use the power tool if the Power Switch does not turn it on or off. Any
tool that cannot be controlled with the Power Switch is dangerous and must be
replaced.

19. Disconnect the Power Cord Plug from the power source before making any
adjustments, changing accessories, or storing the tool. Such preventive safety
measures reduce the risk of starting the tool accidentally.

20. Store idle tools out of reach of children and other untrained persons. Tools
are dangerous in the hands of untrained users.

21. Maintain tools with care. Keep cutting tools sharp and clean. Properly
maintained tools with a sharp cutting edge are less likely to bind and are easier to
control. Do not use a damaged tool. Tag damaged tools “Do not use” until repaired.

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22. Check for misalignment or binding of moving parts, breakage of parts, and
any other condition that may affect the tool’s operation. If damaged, have the
tool serviced before using. Many accidents are caused by poorly maintained

tools.

23. Use only accessories that are recommended by the manufacturer for your
model. Accessories that may be suitable for one tool may become hazardous
when used on another tool.

SERVICE

24. Tool service must be performed only by qualified repair personnel. Service or
maintenance performed by unqualified personnel could result in a risk of injury.

25. When servicing a tool, use only identical replacement parts. Follow

instructions in the

“Inspection, Maintenance, And Cleaning”

section of this

manual. Use of unauthorized parts or failure to follow maintenance instructionsmay

create a risk of electric shock or injury.

SPECIFIC SAFETY RULES

1. Maintain a safe working environment. Keep the work area well lit. Make sure
there is adequate surrounding workspace. Always keep the work area free of
obstructions, grease, oil, trash, and other debris. Do not use the Impact Wrench in
areas near flammable chemicals, dusts, and vapors. Do not use this product in a
damp or wet location.

2. Maintain labels and nameplates on the Impact Wrench. These carry important
information. If unreadable or missing, contact Harbor Freight Tools for a replacement.

3. When using the Impact Wrench, always maintain a firm grip on the tool with

both hands.

4. Do not use the Impact Wrench or Charger (48) if it has been dropped, damaged,
left outdoors, or immersed in liquid.

5. Do not charge the Battery (30) when the temperature is below 50 degrees
Fahrenheit or above 104 degrees Fahrenheit.

6. Do not shake, drop, or strike the Battery (30).

7. To avoid electrical shock, do not pull or carry the Charger (48) by its Power
Cord or pull the Power Cord around sharp corners or edges. Do not unplug the

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