Harbor Freight Tools 94944 User's Manual
Contents
1. SKU 94944 PAGE 15 PARTS LIST Oty Oty 5 7 Screw M8X35 Spring Washer 08 Pin 4X17 O Washer 18X12X1 O Spring Seat N O Clip Ring Clip Ring 68 Oil Bearing CO OT O Oil Bearing baffle Orientation steel Ring CO Washer S Clip Ring Ball Bearing 6002 O Rd S 7 SKU 94944 PAGE 16 O Q ON 2 D NO O O S 5 O Gear Cover Part 3 EW KA 8 9 20 O O O 0O 0 0 OT OT OT OT OT OT OI OT OO PIPIP IPIPIP PIPIPIPIOIOIOIO O N OS ON O OIN D O R O O BB O ND O 0 1 3 O Or E PARTS LIST CONTINUED Part Description Qty Part Description Ton 69 FanGuide J1 80 Screw M8X170 1 86 Nutcover J1 89 Screw ST6X16 F 4 90 NutPlank J1 92 Ball Bearing6000 1 93 BallBearingSet 1 94 Housing J1 95 Screw ST4X14 8 96 _ LeftTailCover 98 Stretoh forward Clip 1 99 Screw ST4X10 1 SKU 94944 PAGE 17 ASSEMBLY DIAGRAM PAGE 18 SKU 94944 WARRANTY VVZW YATAN Vilari YAAN YATAN Vh lt A CIN YD AN VP APRN 1D CENTRAL HYDRAULICS E 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 ninety days from the date of purchase This warranty does not apply t2. N A This warranty gives you specific legal rights and you may also have other rights which vary from state to state D Ch 3491 Mission Oaks Blvd PO Box 6009 e Camarillo CA 93011 e 800 444 3353 kW Z N 4 N 5 EKS JEAN VOR N N AT IIN CANS CANS CAN CANY CANS CANS CANIN LIST PLEASE READ THE FOLLOWING CAREFULLY THE MANUFACTURER AND OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY NEITHER THE MANUFACTURER NOR DISTRIBUTOR MAKES ANY REP RESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT OR THAT HE OR SHE IS QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT IN FACT THE MANUFACTURER AND OR DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND LICENSED TECHNI CIANS AND NOT BY THE BUYER THE BUYER ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS THERETO OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO N i LU Ke lt lt N SN SKU 94944 PAGE 19
3. The Rotary Hammer comes fully assembled There is a Side Handle 74 that must be attached as needed There are two places on the Rotary Hammer that will accept the Side Handle 74 shown below To attach the Side Handle 74 thread it into the housing by twisting it in a clockwise rotation until it stops turning _ Side Handle 74 SKU 94944 PAGE 10 How to attach the chisels WARNING Always make sure this tool is not plugged in before changing the bits 1 Slide the Bits into the Rotary Hammer with the flat cut out side facing the Rod 19 as shown in Figure 2 2 Pull out the Rod 19 while you insert the Bit See Figure 1 The two bits both have a flat space on the shaft that must be turned horizontally when it is inserted See Figure 2 Turn the Rod 19 clockwise 180 to lock the Bit into place The Bit should move in and out after it is locked but should not come out Flat area of Bit Figure 1 Figure 2 OPERATING INSTRUCTIONS How to turn on the Rotary Hammer 1 To turn on the Rotary Hammer squeeze the Switch 107 shown below in Figure 3 There is a latch on the upper part of the switch that locks the switch on Switch 107 Figure 3 SKU 94944 PAGE 11 OPERATING INSTRUCTIONS WARNING Always wear ANSI approved impact safety goggles Wear a full face shield if you are producing metal filings or wood chips Wear an ANSI approved dust mask or respirator when working around metal wood and chemical
4. The Rotary Hammer will begin to break the top layer of concrete If you push down It will begin to break the next layer as well 5 Keep moving the Rotary Hammer along the line you want to section breaking concrete as you go If the Rotary Hammer jumps off of the line or section release the Switch 107 and reposition the Rotary Hammer 6 When you are finished release the Switch 107 and unplug the Rotary Hammer SKU 94944 PAGE 12 Breaking up concrete 1 Place the bit on the center of a piece of concrete 2 Grasp the handles firmly with both hands When you are sure that no people or animals are in the vicinity and its safe to begin depress the Switch 107 3 As you break the concrete into big chunks release the Switch 107 and move to other large pieces until all of the larger pieces are broken Do not try to break up smaller pieces with this tool as it is too powerful and aggressive to control on small pieces 4 When you are finished release the Switch 107 and unplug the Rotary Hammer Using the Rotary Hammer as a hammer drill NOTE When you inset the Auger bit the Rotary Hammer will automatically convert into a rotary hammer The Auger bit will rotate and hammer at the same time 1 Place the bit on the center of a piece of concrete 2 Grasp the handles firmly with both hands When you are sure that no people or animals are in the vicinity and it s safe to begin depress the Switch 107 3 As you drill in
5. 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 H eliminates the need for the three wire grounded power cord and grounded power supply system 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 Do not expose power tools to rain or wet conditions Water entering a power tool will increase the risk of electric shock 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 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 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 SKU 94944 PAGE 3 11 Dress properly Do not wear
6. CHICAGO dailei Power Tools ROTARY HAMMER ASSEMBLY AND OPERATING INSTRUCTIONS Distributed Exclusively by Harbor Freight Tools 3491 Mission Oaks Blvd Camarillo CA 93011 Visit our Web site at http www harborfreight com TO PREVENT SERIOUS INJURY READ AND UNDERSTAND ALL WARNINGS AND INSTRUCTIONS BEFORE USE Copyright 2006 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 guestions please call 1 800 444 3353 PRODUCT SPECIFICATIONS ITEM Electrical Requirement Impactor Travel 1 65 21mm Overall Dimensions 29 L X 6 3 8 W X 9 3 4 H hammer only Blows per minute 750 1950 No load speed 100 250 RPM Retainer Style Spring loaded rotational lock 2 positions only Bit Dimensions Chisel Bit part 119 3 4 Shank X 14 7 8 L Masonry Drill part 118 3 4 Dia X 16 1 2 L Noise Level Impact Energy Tool Weight Maximum Drill Bit Capacity 1 9 concrete brick limestone Maximum Core Bit Capacity 5 9 concrete brick limestone NOTE Plug this tool into a 20 Amp dedicated circuit Use GFCI Plug 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
7. Make sure your extension cord is properly wired and in good electrical condition Always replace a damaged extension cord or have it repaired by a qualified electrician before using it 8 Protect your extension cords from sharp objects excessive heat and damp or wet areas RECOMMENDED MINIMUM WIRE GAUGE FOR EXTENSION CORDS NAMEPLATE AMPERES EXTENSION CORD LENGTH At Full Load s0Feet 75 Feet 100 Feet FIGURE C Basedon limiting the line voltage drop to five volts at 150 of the rated amperes SKU 94944 PAGE 7 FIGURE C SYMBOLOGY Double Insulated Canadian Standards Association Underwriters Laboratories Inc Volts Alternating Current no l No Load Revolutions xxxx min er Minute RPM SPECIFIC SAFETY RULES 1 E N Maintain labels and nameplates on the Rotary Hammer These carry important information If unreadable or missing contact Harbor Freight Tools for a replacement Industrial applications must follow OSHA requirements Check for damaged parts Before using this product carefully check that it will operate properly and perform its intended function Check for damaged parts and any other conditions that may affect the operation of this product Replace or repair damaged or worn parts immediately Always disconnect the Rotary Hammer from its electrical outlet before performing any service maintenance or cleaning such as leaving the work area moving the tool from one location to
8. anent physical injury particularly to the hands arms and shoulders To reduce the risk of vibration related injury 1 Anyone using vibrating tools regularly or for an extended period should first be examined by a doctor and then have regular medical check ups to ensure medical problems are not being caused or worsened from use Pregnant women or people who have impaired blood circulation to the hand past hand injuries nervous system disorders diabetes or Raynaud s Disease should not use this tool If you feel any medical or physical symptoms related to vibration such as tingling numbness and white or blue fingers seek medical advice as soon as possible 2 Do not smoke during use Nicotine reduces the blood supply to the hands and fingers 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 between different processes 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 T To reduce vibration maintain the tool as explained in this manual If any abnormal vibration occurs stop use immediately REV 07j SKU 94944 PAGE 9 ASSEMBLY INSTRUCTIONS Note Turn to pages 16 18 to assist you in identifying the parts mentioned in the assembly operating instructions and troubleshooting sections of this manual
9. another changing chisels cleaning dirt off the unit etcetera WARNING Some dust created by power sanding sawing grinding drilling and other construction activities contain chemicals known to the State of California to cause cancer birth defects or other reproductive harm Some examples of these chemicals are a Lead from lead based paints b Crystalline silica from bricks and cement or other masonry products c Arsenic and chromium from chemically treated lumber Your risk from these exposures varies depending on how often you do this type of work To reduce your exposure to these chemicals work in a well ventilated area and work with approved safety equipment such as those dust masks that are specially designed to filter out microscopic particles California Health amp Safety Code 25249 5 et seq SKU 94944 PAGE 8 6 WARNING People with pacemakers should consult their physician s before using this product Electromagnetic fields in close proximity to a heart pacemaker could cause interference to or failure of the pacemaker UNPACKING When unpacking check to make sure all parts shown on the Parts Lists and Assembly Diagrams on pages 15 17 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 VIBRATION HAZARD This tool vibrates during use Repeated or long term exposure to vibration may cause temporary or perm
10. dusts and mists Always wear ear protection Ear protection is reguired for any other persons in the work area WARNING Be aware of flying concrete chips Keep all spectators clear of the work area WARNING Do not operate this tool if you have back neck wrist or other conditions or injuries that will be aggravated by the severe jerking forces that this tool exerts upon its operator WARNING If the Rotary Hammer ever gets out of your control immediately release the Switch 107 NOTE Use the weight of the Rotary Hammer to help you break up concrete Use the tool in the vertical position whenever possible IMPORTANT READ BEFORE USE This Rotary Hammer may have decreased performance for a brief period at the beginning of each use This warmup period lasts approximately 3 5 minutes This happens because the grease inside the tool may be somewhat thick preventing the tool from operating at full efficiency while the motor is cold This is perfectly normal and does not indicate a problem To help reduce this effect we recommend storing this eguipment in temperatures no lower than 50 60 F Chipping in a straight line 1 Use chalk or another suitable writing material and mark you work surface to delineate the area you intend to hammer 2 Plug in the Rotary Hammer 3 Grasp the handles firmly with both hands When you are sure that no people or animals are in the vicinity and it s safe to begin depress the Switch 107 4
11. e outlet is properly grounded Do not modify the power cord plug provided with the tool Never remove the grounding prong from the plug Do not use the tool if the power cord or plug is damaged If damaged have it repaired by a service facility before use If the plug will not fit the outlet have a proper outlet installed by a qualified electrician GROUNDED TOOLS TOOLS WITH THREE PRONG PLUGS aa N Ge Tools marked with Grounding Required have a three wire cord and three prong grounding plug The plug must be connected to a properly grounded outlet If the tool should electrically malfunction or break down grounding provides a low resistance path to carry electricity away from the user reducing the risk of electric shock See Figure A next page The grounding prong in the plug is connected through the green wire inside the cord to the grounding system in the tool The green wire in the cord must be the only wire connected to the tool s grounding system and must never be attached to an electrically live terminal See Figure A 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 page 6 SKU 94944 PAGE 5 FIGURE A DOUBLE INSULATED TOOLS TOOLS WITH TWO PRONG PLUGS 4 Tools marked Double Insulated do not require grounding They have a
12. educe the risk of starting the tool accidentally 18 Store idle tools out of reach of children and other untrained persons Tools are dangerous in the hands of untrained users 19 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 20 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 21 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 SKU 94944 PAGE 4 Tool service must be performed only by gualified repair personnel Service or maintenance performed by unqualified personnel could result in a risk of injury 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 instructions may create a risk of electric shock or injury WARNING Improperly connecting the grounding wire can result in the risk of electric shock Check with a qualified electrician if you are in doubt as to whether th
13. ews that attach the Left Tail Cover 96 and the four screws that attach the Right Tail Cover 91 See Page 13 Next remove each Carbon Brush 105 by gently pulling on the wire that it is connected to Disconnect the Carbon Brush connector and insert the new brushes by bushing them into the Brush House 104 After both Carbon Brushes 105 are inserted attach the Carbon Brush connector the Left Tail Cover 96 and the Right Tail Cover 91 See Figure 5 below Left Tail Cover Left LED Light Figure 5 SKU 94944 PAGE 14 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 TROUBLESHOOTING Problem Cause Action Motor doesn t rotate Disrupted power Check power supply when switched on Poor switch contact Have switch repaired Worn carbon brushes Replace brushes Overheated gearbox Dull Drill Bit Replace or sharpen the Drill Bit Excessive use Allow tool to cool down Gears need grease 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
14. 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 Make sure you are prepared to begin work before turning the Power Switch 62 ON 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 Donotoverreach Keep proper footing and balance at all times Proper footing and balance enables better control of the power tool in unexpected situations Always wear eye hearing and breathing protection Wear ANSI approved safety impact eye glasses ANSI approved hearing protectors and ANSI approved dust mask or respirator when using this product Also non skid safety shoes and a hard hat must be used for appropriate conditions TOOL USE AND CARE 16 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 or repaired Disconnect the Power Cord Plug from the power source before making any adjustments changing accessories or storing the tool Such preventive safety measures r
15. 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 A WARNING LEN 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 REV 07e SKU 94944 PAGE 2 10 Do not operate power tools in explosive atmospheres such as in the presence of flammable liquids gases or dust Power tools create sparks which may ignite the dust or fumes 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 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 gualified 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 Double insulated tools are equipped with a polarized plug one blade is wider
16. o damage due directly or indirectly to misuse abuse negligence or accidents repairs or alterations E outside our facilities or to lack of maintenance We shall in no event be liable for death injuries to NN persons or property or for incidental contingent special or consequential damages arising from the M 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 p77 IN LIEU OF ALL OTHER WARRANTIES EXPRESS OR IMPLIED INCLUDING THE WARRANTIES lt lt OF MERCHANTABILITY AND FITNESS NN S 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 H 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 d 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 A N Sea DYTKIN VIN VV WW G i A SN WA XKL N TA VV n TAA AY Gei SU j AS gt A Ch H N N lt Ke d V N N N W lt
17. special double insulation system which satisfies OSHA requirements and complies with the applicable standards of Underwriters Laboratories Inc the Canadian Standard Association and the National Electrical Code See Figure B 5 Double insulated tools may be used in either of the 120 volt outlets shown in the following illustration See Figure B FIGURE B SKU 94944 PAGE 6 EXTENSION CORDS 1 Grounded tools reguire a three wire extension cord Double Insulated tools can 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 3 The smaller the gauge number of the wire the greater the capacity of the cord For example a 14 gauge cord can carry a higher current than a 16 gauge cord See Figure C and Figure D 4 If using more than one extension cord to make up the total length make sure each cord contains at least the minimum wire size reguired D If you are using one extension cord for more than one tool add the nameplate amperes and use the sum to determine the reguired minimum cord size See Figure C and Figure D 6 If you are using an extension cord outdoors make sure it is marked with the suffix WAT W in Canada to indicate it is acceptable for outdoor use 7
18. to the concrete firmly press against the material being drilled into 4 When you are finished release the Switch 107 and unplug the Rotary Hammer How to adjust the Masonry Drill 118 speed The Masonry Drill 118 speed is adjusted by turning the Speed Control Knob 100 See Figure 4 The higher the number the faster the Masonry Bit 118 will spin The Rotary Hammer will automatically rotate and hammer once you attach the Masonry Bit 118 Speed Control Knob 100 Figure 4 SKU 94944 PAGE 13 INSPECTION MAINTENANCE AND CLEANING WARNING Always disconnect the Rotary Hammer from its electrical power supply source before performing any inspection maintenance or cleaning procedure 2 Before each use inspect the general condition of the Rotary Hammer Inspect switch power plug and cord assembly and extension cord if used for damage Check for loose screws misalignment binding of moving parts broken cracked or improper mounting of the chisels If abnormal noise or vibration occurs turn off the Rotary Hammer immediately and have the problem corrected before further use Do not use damaged equipment Replacing the Carbon Brushes 105 Replacing the Carbon Brushes 105 NOTE The Rotary Hammer Has a red LED located on the handle that will light up when the Carbon Brushes 105 are worn down and need to be replaced See Figure 5 below To replace the Carbon Brushes 105 you must first remove the four scr
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