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UNPACKING

When unpacking, check to make sure all the parts shown on the Parts List on page 14
are included.  If any parts are missing or broken, please call Harbor Freight Tools at the
number shown on the cover of this manual as soon as possible.

PRODUCT FEATURES

NOTE: For additional information regarding the parts listed in the following pages, refer
to the Assembly Diagram on page 15.

1.

        WARNING!   Always make sure the Trigger Switch (21) of the Impact
Wrench is in its “OFF” position, the Battery (30) is removed from the Impact
Wrench, and the Charger (48) is unplugged from its electrical outlet prior to
making any adjustments to the tool.  (See Figure D.)

SKU 90798

PAGE 10

BATTERY (30)

STRAP (3)

1/2” SOCKET (49)

3/8” DRIVE

IMPACT HEAD

TRIGGER SWITCH

(21)

FORWARD/REVERSE

BUTTON

2.

Trigger Switch (21): The Trigger Switch is operated 

manually simply by squeezing

the Trigger Switch to turn on the Impact Wrench and releasing pressure on the
Trigger Switch to turn off the Impact Wrench.  (See Figure D.)

FIGURE D

Summary of Contents for 90798

Page 1: ...it 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 ...

Page 2: ...lt 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 SKU 90798 PAGE 2 Item Description Power Source 18 VDC Battery 1 3 Ah Battery Lock Yes Cl...

Page 3: ...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 ...

Page 4: ...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 S...

Page 5: ...y 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 Wr...

Page 6: ... after tool performance is decreasing Never attempt to discharge a tool s Battery by continuing to pull the tool s trigger When tool performance begins to diminish stop the tool recharge the Battery and use the fresh Battery for optimal performance 14 Battery 30 leakage may occur under extreme usage or temperature conditions If Battery fluid comes in contact with skin wash with soap and water and ...

Page 7: ...and must never be attached to an electrically live terminal See Figure A 3 Your tool must be plugged into an appropriate outlet properly installed and grounded in accordance with all codes and ordinances The plug and outlet should look like those in the following illustration See Figure A FIGURE A SKU 90798 PAGE 7 Improperly connecting the grounding wire can result in the risk of electric shock Ch...

Page 8: ...an use either a two or three wire extension cord 2 As the distance from the supply outlet increases you must use a heavier gauge extension cord Using extension cords with inadequately sized wire causes a serious drop in voltage resulting in loss of power and possible tool damage See Figure C next page 3 The smaller the gauge number of the wire the greater the capacity of the cord For example a 14 ...

Page 9: ...d damp or wet areas SKU 90798 PAGE 9 RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS 120 VOLT NAMEPLATE AMPERES At Full Load EXTENSION CORD LENGTH 25 Feet 50 Feet 75 Feet 100 Feet 150 Feet 0 2 0 18 18 18 18 16 2 1 3 4 18 18 18 16 14 3 5 5 0 18 18 16 14 12 5 1 7 0 18 16 14 12 12 7 1 12 0 18 14 12 10 12 1 16 0 14 12 10 16 1 20 0 12 10 Based on limiting the line voltage drop to five volts at 150 o...

Page 10: ...ING Always make sure the Trigger Switch 21 of the Impact Wrench is in its OFF position the Battery 30 is removed from the Impact Wrench and the Charger 48 is unplugged from its electrical outlet prior to making any adjustments to the tool See Figure D SKU 90798 PAGE 10 BATTERY 30 STRAP 3 1 2 SOCKET 49 3 8 DRIVE IMPACT HEAD TRIGGER SWITCH 21 FORWARD REVERSE BUTTON 2 Trigger Switch 21 The Trigger Sw...

Page 11: ...3 When the Battery 30 requires recharging a 3 to 5 hour charge allows the tool to operate at full power Do not recharge the Battery longer than 5 hours as damage to the Battery and or Impact Wrench will occur 4 Remove the Battery 30 from the Impact Wrench Slide the Charging Base 50 onto the top of the Battery 30 see Figure 1 page 12 and plug the Charger 48 into the Charging Base see Figure 2 page ...

Page 12: ...et 49 onto the nut that is to be loosened tightened NOTE If using the accessory 1 2 Socket the nut itself must be 1 2 9 Make sure to hold the Impact Wrench firmly with both hands as torque from the Motor will cause the tool to twist Then squeeze the Trigger Switch 21 to turn on the Impact Wrench SKU 90798 PAGE 12 BATTERY 30 CHARGER BASE 50 RED CHARGING INDICATOR LIGHT PLUG INTO 120 VOLT GROUNDED E...

Page 13: ... Impact Wrench Do not immerse the Impact Wrench in any liquids SKU 90798 PAGE 13 PLEASE READ THE FOLLOWING CAREFULLY THE MANUFACTURER AND OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY NEI THER THE MANUFACTURER OR DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE ...

Page 14: ...PARTS LIST SKU 90798 PAGE 14 REV 05 06 50 Charger Base 1 ...

Page 15: ...4 25 2 6 27 38 12 39 26 21 42 43 35 47 40 3 46 41 36 30 37 27 29 8 1 44 45 31 14 16 17 7 33 11 5 28 49 1 2 SOCKET NOT SHOWN NOTE Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts 48 REV 05 06 50 ...

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