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SKU 93853        

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

PAGE 14

Grasp the Demolition Hammer firmly by its rear Handle (62) and Auxiliary Handle 

3. 

(104A).  Then, turn the Power Switch (66) to its “ON” position to begin work.

IMpORTANT:  

4. 

This Demolition Hammer requires a short period of time to warm 

up.  Depending on the room temperature, this time may vary from approximately 

15 seconds

 (at 90 degrees Fahrenheit) to 

2 minutes

 (at 32 degrees Fahrenheit).    

A new Hammer requires a break-in period before full performance is realized.  

This period may require up to 

5 hours

 operation.  

(See Figure E.)

For the best penetration rates in concrete, run the Demolition Hammer with 

5. 

a steady pressure but do not use excessive force as this will decrease the 

efficiency of the tool.

If necessary, adjust the Variable Speed Control Dial (72) to increase the tool’s 

6. 

cutting efficiency.  

(See Figure E.)

When finished using the Demolition Hammer, turn the Power Switch (66) to its 

7. 

“OFF” position.  Then, unplug the tool from its electrical outlet.  

(See Figure E.)

Allow the Chisel (106, 107) to completely cool.  Then, pull and hold the locking 

8. 

Slider (4) backward and pull the Chisel forward.  The Chisel should be cleaned 

after removing.  

(See Figure F.)

Make sure to store the Demolition Hammer in a clean, dry, safe location out of 

9. 

reach of children and other unauthorized people.

INSpEcTION, MAINTENANcE, AND cLEANINg

cAuTION!

  Always make sure the Power Switch (66) of the Demolition Hammer is 

in its 

“OFF”

 position and the tool is unplugged from its electrical outlet prior to 

performing any inspection, maintenance, or cleaning.

Before each use,

1. 

 inspect the general condition of the Demolition Hammer.  

Check for loose screws, misalignment or binding of moving parts, cracked or 

broken parts, damaged electrical wiring, and any other condition that may affect 

its safe operation.  If abnormal noise or vibration occurs, have the problem 

corrected before further use.  

Do not use damaged equipment.

To replace the Motor carbon Brushes:  

2. 

It may become necessary at sometime 

to replace or clean the two Carbon Brushes (76) when the Motor performance 

decreases, or stops working completely.  

The carbon Brushes are located on 

each side of the Motor casing 

(61).  To replace the Carbon Brushes, remove 

the two Brush Holder Covers (79).  Remove the Brush Caps (77).  Then, remove 

the two Carbon Brushes from the two Brush Holders (75).  If the Carbon Brushes 

REV10d

Summary of Contents for DEMOLITION HAMMER 93853

Page 1: ...erved 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 improve ments actual product may differ slightly from the product described herein Tools required for assembly and service may not be included For technical qu...

Page 2: ...ntenance 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 all instructions Failure to follow all instructions listed below may result in electric shock fire and or serious injury The term powe...

Page 3: ...rigerators There is an increased risk of electric shock if your body is grounded Do not expose power tools to rain or wet conditions 4 Water entering a power tool will increase the risk of electric shock Do not abuse the Power Cord 5 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 C...

Page 4: ...t use the power tool if the Power Switch does not turn it on or off 3 Any tool that cannot be controlled with the Power Switch is dangerous and must be replaced Disconnect the Power Cord Plug from the power source before making any 4 adjustments changing accessories or storing the tool Such preventive safety measures reduce the risk of starting the tool accidentally Store idle tools out of reach o...

Page 5: ...nment 3 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 a power tool in areas near flammable chemicals dusts and vapors Do not use this product in a damp or wet location Avoid unintentional starting 4 Make sure you are prepared to begin work before turning on the Demolition Ham...

Page 6: ... avoid contact with skin and use proper protective gloves when grasping the Chisel Do not force the Chisel into the workpiece when cutting 17 Apply moderate pressure allowing the Chisel to cut without being forced Never attempt to remove material stuck in the moving parts of the 18 Demolition Hammer while it is plugged in and running Always unplug the Demolition Hammer from its electrical outlet b...

Page 7: ...cemakers should consult their physician s before use 24 Electromagnetic fields in close proximity to heart pacemaker could cause pacemaker interference or pacemaker failure In addition people with pacemakers should Avoid operating alone Don t use with power switch locked on Properly maintain and inspect to avoid electrical shock Any power cord must be properly grounded Ground Fault Circuit Interru...

Page 8: ... 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 Do not smoke during use Nicotine reduces the blood supply to the hands and 2 fingers increasing the risk of vibration related injury Wear suitable gloves to redu...

Page 9: ...alfunction or break down grounding provides a low resistance path to carry electricity away from the user reducing the risk of electric shock See 3 Prong Plug and Outlet The grounding prong in the plug is connected through the green wire inside the 2 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 ...

Page 10: ...ble tool damage See Table A The smaller the gauge number of the wire the greater the capacity of the cord 3 For example a 14 gauge cord can carry a higher current than a 16 gauge cord See Table A When using more than one extension cord to make up the total length make 4 sure each cord contains at least the minimum wire size required See Table A If you are using one extension cord for more than one...

Page 11: ...t 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 TABLE A Based on limiting the line voltage drop to five volts at 150 of the rated amperes Symbology Double Insulated V Volts Alternating Current Canadian Standards Association A Amperes Underwriters Laboratories Inc n0 xxxx min No Load Revolut...

Page 12: ...its electrical outlet prior to adding accessories or performing maintenance on the tool OIL CAP 45 SLIDER 4 FRONT CAP 1 KNOB 105 AUXILIARY HANDLE 104A POWER SWITCH 66 VARIABLE SPEED CONTROL 72 FIGURE E 1 Oil Cap 45 Prior to the Demolition Hammer s first use remove the Oil Cap and check to make sure the tool is properly filled with grease If necessary fill the tool with approximately 1 1 4 ounces o...

Page 13: ...sired position along the barrel of the tool and firmly retighten the Knob See Figure E FIGURE F SLIDER 4 FRONT CAP 1 OIL OR GREASE NOT INCLUDED CHISEL 106 107 CHISEL 106 107 SLIDER 4 FRONT CAP 1 5 Front Cap 1 and Slider 4 To install a Chisel 106 107 clean the insert shank end of the chisel to remove any debris Then lightly grease the shank with a light oil or grease Insert the Chisel into the Slid...

Page 14: ...he locking 8 Slider 4 backward and pull the Chisel forward The Chisel should be cleaned after removing See Figure F Make sure to store the Demolition Hammer in a clean dry safe location out of 9 reach of children and other unauthorized people INSPECTION MAINTENANCE AND CLEANING CAUTION Always make sure the Power Switch 66 of the Demolition Hammer is in its OFF position and the tool is unplugged fr...

Page 15: ...c or spark when first used until they wear and conform to the Motor s Rotor See Figure G Every 70 to 80 hours of tool use 3 Remove the Oil Cap 45 and replace the grease Fill the tool with approximately 1 1 4 ounces of 3 Lithium based grease not included Then replace the Oil Cap See Figure E To clean the exterior parts of the Demolition Hammer 4 use only a clean cloth and mild detergent Then dry Us...

Page 16: ... the type of work being 2 done See page 12 Apply moderate pressure only Allow the tool to do the cutting without 3 being forced Check the Motor Carbon Brushes for excessive wear and or debris 4 Replace or clean if necessary See page 14 Have a qualified service technician service the tool 5 Tool overheats and suddenly stops running Make sure the tool is filled with approximately 1 1 4 ounces of 3 1...

Page 17: ... ordered individually Must be ordered as a complete Motor Assembly Includes parts 33 34 35 36 37 40 58 59 60 61 73 74 Cannot be ordered individually Must be ordered as a complete Carbon Brush Assembly Includes parts 75 76 77 A 108 Clamping Piece 2 109 Complete Motor Assy 1 110 Complete Carbon Brush Assy 1 ...

Page 18: ...e call 1 800 444 3353 PAGE 18 ASSEMBLY DIAGRAM REV 08g 10d Note Some parts are listed and shown for illustration purposes only and are not available individually as replacement parts 106 Spade Chisel not shown 107 Ball Point Chisel not shown ...

Page 19: ...y 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 advantag...

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