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Makita HR3851 manual

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Table of contents for the manual

  • Page 1

    INSTR UCTION MANU AL W ARNING: F or your personal saf ety , READ and UNDERST AND bef ore using. SA VE THESE INSTRUCTIONS FOR FUTURE REFERENCE. www .makitatools.com Rotar y Hammer 38 mm (1 - 1/2”) MODEL HR3851 003098[...]

  • Page 2

    2 SPECIFICATIONS • Manuf acturer reser ves the right to change specifications without notice. • Specifications ma y differ from country to countr y . GENERAL SAFETY R ULES USA001-2 (F or All T ools ) W ARNING: Read and understand all instructions. F ailure to f ollow all instructions listed below , ma y result in electr ic shock, fire and/or se[...]

  • Page 3

    3 to whether the outlet is properly grounded. If the tools should electrically mal- function or break down, grounding pro vides a low resistance path to carry electr icity aw ay from the user . 5. A void body contact with gr ounded sur- faces such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your bo[...]

  • Page 4

    4 model. Accessories that may be suitab le for one tool, ma y become hazardous when used on another tool. SER VICE 23. T ool service must be performed only b y qualified repair personnel. Service or main- tenance performed by unqualified personnel could result in a risk of injur y . 24. When servicing a tool, use only identical replacement parts. F[...]

  • Page 5

    5 An adapter Fig. “B” and “C” is av ailable f or connecting Fig. “A” type plugs to two-prong receptacles. The g reen-colored r igid ear , lug, etc., e xtending from the adapter must be con- nected to a permanent ground, such as a properly grounded outlet box. SPECIFIC SAFETY R ULES USB010-2 DO NO T let comfort or familiarity with produc[...]

  • Page 6

    6 8. Hold the tool firmly with both hands. 9. Keep hands awa y from moving parts. 10. Do not leave the tool running. Operate the tool only when hand-held. 11 . Do not point the tool at any one in the area when operating. The bit could fly out and injure someone seriously . 12. Do not touch the bit or parts close to the bit immediately after operati[...]

  • Page 7

    7 FUNCTIONAL DESCRIPTION CA UTION: • Alwa ys be sure that the tool is s witched off and unplugged bef ore adjusting or checking function on the tool. Switch action CA UTION: • Bef ore plugging in the tool, always chec k to see that the s witch tr igger actuates properly and retur ns to the “OFF” position when released. T o star t the tool, [...]

  • Page 8

    8 ASSEMBL Y CA UTION: • Alwa ys be sure that the tool is s witched off and unplugged before carrying out any w or k on the tool. Side grip (auxiliary handle) F or maximum control and safer operation, alw ays use the side grip with this tool. The side grip swings around to either side, allo wing easy handling of the tool in any position. Loosen th[...]

  • Page 9

    9 Depth gauge The depth gauge is conv enient for drilling holes of unif or m depth. Inser t the depth gauge into the hole in the grip base. Adjust the depth gauge to the desired depth and then tighten the clamp screw to secure the depth gauge . NO TE: • The depth gauge cannot be used at the position where the depth gauge strikes against the tool [...]

  • Page 10

    10 Chipping/Scaling/Demolition Set the change le ver to the symbol. Hold the tool firmly with both hands. T ur n the tool on and apply slight pressure on the tool so that the tool will not bounce around, uncontrolled. Pressing v er y hard on the tool will not increase the efficiency . Core bit (optional accessory) When using the center bit Screw th[...]

  • Page 11

    11 T o remov e the core bit, follo w the procedures 1 or 2. 1. Rotate the change le ver to the position. Then rest the core bit on the concrete and tur n the tool on. The core bit will come loose from the hammering action. 2. Hold the adapter with the wrench, inser t the rod (optional a c c e s s o r y )i n t ot h eh o l ei nt h ec o r eb i ta n dt[...]

  • Page 12

    12 Replacing carbon brushes When the resin insulating tip inside the carbon brush is e xposed to contact the commutator , it will automatically shut off the motor . When this occurs, both carbon brushes should be replaced. K eep the carbon br ushes clean and free to slip in the holders. Both carbon brushes should be replaced at the same time. Use o[...]

  • Page 13

    13 Wipe out the old grease inside and replace with a fresh grease (60 g; 2 oz). Use only Makita genuine hammer grease (optional accessory). Filling with more than the spec- ified amount of grease (appro x. 60 g; 2 oz) c an cause f aulty hammering action or tool failure . Fill only with the specified amount of grease. Reinstall the crank cap and tig[...]

  • Page 14

    Memo 14[...]

  • Page 15

    Memo 15[...]

  • Page 16

    Memo 16[...]

  • Page 17

    17 First-Class Postage Required Post Office will not deliver without proper postage. Makita U .S.A., Inc. 14930 Nor tham Street La Mirada, CA 90638-5753 Fold Cut[...]

  • Page 18

    18 1. This product was purc hased from: Home Center Hardware/Lumber Store T ool Distributor Industrial Supply Construction Supply Other ( ) 3. Ho w did you learn about this product: Magazine F rom Dealer Newspaper Store Display Catalog Radio Exhibition F rom Friend Previous Usage Other ( ) 2. Use of the pr oduct is intended for: Construction T rade[...]

  • Page 19

    19 F A CT OR Y SER VICE CENTERS 1-800-4-MAKIT A RET AIN THIS POR TION FOR Y OUR RECORDS ALABAMA 2365 Pelham P arkway Pelham, AL 35124 (205) 620-1791 ARIZONA 3707 E. Broadw ay Rd., Ste. 6 Phoenix, AZ 85040 (602) 437-2850 ARKANSAS Shackleford Shopping Center 240 South Shackleford Rd., Ste. C Little Rock, AR 72211 (501) 224-5733 CALIFORNIA 41850 Chris[...]

  • Page 20

    W ARNING Some dust created by po wer sanding, sawing, g r inding, drilling, and other construction activities contains chemicals known to the State of Calif or nia to cause cancer , bir th defects or other reproductiv e harm. Some examples of these chemicals are: • lead from lead-based paints, • cr ystalline silica from bricks and cement and ot[...]