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Makita HR2450T manual

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Table of contents for the manual

  • Page 1

    Models No. Description PR ODUCT T ECHNICAL INFORMA TION C ONCEPTION AND MAIN APPLICA TIONS S pecif ication S tandard equipment O ptional accessories < Note > The standard equipment for the tool sho wn may differ from country to country . P 1 / 22 HR2450FT , HR2450T 24mm (15/16") Rotary Hammer The abov e models are the advanced version of[...]

  • Page 2

    R epair P 2 / 2 2 < 1 > Lubrication to the bit holder section Apply MAKIT A grease to the following portions to protect parts and product from unusual abrasion. * MAKIT A grease RA No.1 to the portions designated with black triangle. * MAKIT A grease F A No. 2 to the portions designated with gray triangle. * MAKIT A hammer oil to the portions[...]

  • Page 3

    R epair P 3 / 2 2 < 2 > Lubrication to the machine parts Apply MAKIT A grease to the following portions to protect parts and product from unusual abrasion. * MAKIT A grease RA No.1 to the portions designated with black triangle. * MAKIT A grease F A No. 2 to the portions designated with gray triangle. * MAKIT A hammer oil to the portions desi[...]

  • Page 4

    R epair P 4 / 2 2 < 3 > Assembling quick change chuck (1) Mount torsion spring 31 by inserting pin of torsion spring 31 into the hole of tool holder and mount 2 pcs. of steel ball 6.0 to tool holder . See Fig. 1. (2) Mount change ring to the inside of change cov er while aligning the hole of change ring with the hole of change cov er . See Fi[...]

  • Page 5

    R epair P 5 / 2 2 < 4 > Disassembling quick change chuck (4) Mount steel ball 5.0 to the space between change cov er and tool holder . And secure the steel ball 5.0 with leaf spring. See Fig. 4. (5) Mount flat washer 24. See Fig. 5. (6) Secure flat washer 24 with ring spring 21. See Fig. 6. (7) Mount flat washer 2. And then mount steel ball 7[...]

  • Page 6

    R epair P 6 / 2 2 < 5 > Assembling quick change drill chuck Leaf spring Flat washer 24 Flat washer 24 Ring spring 21 Steel ball 5.0 Leaf spring Leaf spring Fig. 15 Fig. 16 Fig. 18 Fig. 16A (5) Remov e ring spring 21. Then, flat washer 24 can be remo ved from tool holder . See Fig. 15. (6) Remov e leaf spring with No.1R212 "Retaining Ring[...]

  • Page 7

    R epair P 7 / 2 2 (4) Mount torsion spring 31 to the chuck holder by inserting its short pin into the pin hole of chuck holder . See Fig. 21. Insert the short pin of torsion spring 31 into the pin hole of chuck holder . Fig. 21 (5) Mount change ring to the inside of change cov er while aligning the hole of change ring with the hole of change cov er[...]

  • Page 8

    R epair P 8 / 2 2 < 6 > Disassembling quick change drill chuck Fig. 27 Fig. 28 Fig. 29 Fig. 30 Fig. 29A Fig. 31 Fig. 32 Fig. 33 Fig. 34 Steel ball 5.0 Leaf spring Leaf spring Flat washer 24 Flat washer 24 Ring spring 21 Leaf spring (1) Remov e ring spring 21. Then, flat washer 24 can be remo ved from chuck holder . See Fig. 27 and Fig. 28. (2[...]

  • Page 9

    R epair P 9 / 2 2 < 7 > Disassembling change le ver (1) Separate cap from change le ver . See Fig. 35. (1) Apply grease to the pin of change l e v er and O ring 17. Refer to "< 2 > Lubrication to the machine parts" in page 3 . < Note > Be careful, not to lose lock button and compression spring 3. They can easily spring o[...]

  • Page 10

    R epair P 1 0 / 2 2 < 9 > Disassembling armature Fig. 40 Fig. 41 Fig. 42 Fig. 43 1. Remov e handle cover by unscre wing 3 pcs. of tapping screw 4 x 45. And remove carbon brushes as illustrated in Fig. 40. 2. Separate gear housing together with armature, from motor housing by unscre wing 4 pcs. of tapping screw 4 x 45 as illustrated in Fig. 41[...]

  • Page 11

    R epair P 1 1 / 2 2 < 10 > Disassembling tool holder guide section ( 1 ) After rem o ving change l e v er ( See page 9 ), separate gear housing from motor housing as illustrated in Fig. 40 and Fig. 41 in page 1 0 . ( 1 ) Apply grease to spur gear 51 and tool holder guide referring to "< 2 > Lubrication to the machine parts" in[...]

  • Page 12

    R epair P 1 2 / 2 2 < 12 > Disassembling impact bolt ( 1 ) Referring to "< 10 > Disassembling tool holder guide section" in page 1 1 , rem o v e ring spring 29, w asher 31, compression spring 32 and spur gear 51 from tool holder guide. See Fig. 44, 45, 46, 47 and Fig. 48. ( 2 ) Push the cut portion of ring spring 28 to the out[...]

  • Page 13

    V ise R epair P 1 3 / 2 2 4. Insert "No.1R236 Round bar for arbor" and push the inner parts of tool holder guide as deep as possible to ward the inner housing side. See Fig. 51 5. Pick up ring spring 28 with plier and take of f it from tool holder guide as illustrated in Fig. 52. 6. The follo wing parts can be remov ed from tool holder gu[...]

  • Page 14

    R epair P 1 4 / 2 2 < 14 > Disassembling swash bearing (1) Referring to at page 6 , disassemble the product in the order of Fig.40, Fig.41, Fig.42, Fig.44 and Fig. 45 in page 1 0 and 1 1 . And separate inner housing together with tool holder section and swash bearing section from gear housing as illustrated in Fig. 54. Ball baring 606ZZ can r[...]

  • Page 15

    R epair P 1 5 / 2 2 (6) Reassemble swash bearing section temporarily to gear housing, and hold gear housing as illustrated in Fig. 59. So, swash bearing section tilts in the direction of arro w . K eeping the illustrated position, remove swash bearing section by striking the edge of gear housing with plastic hammer . So, ball bearing 606ZZ can be r[...]

  • Page 16

    R epair P 1 6 / 2 2 < 15 > Assembling swash bearing section < 16 > Assembling swash bearing section to piston cylinder (1) Apply grease to the parts of s w ash bearing section referring to "< 2 > Lubrication to the machine parts" in page 3 . (2) Assemble swash bearing 10 by pressing cam shaft with arbor press as illustra[...]

  • Page 17

    R epair P 1 7 / 2 2 Clutch cam Clutch cam Change plate Cam shaft Change plate Spur gear 10 Clutch cam Change plate Compression spring 7 Compression spring 6 Spur gear 10 Retaining ring S-7 (6) Set change plate in the groov e of clutch cam, and assemble the clutch cam with change plate to cam shaft as illustrated in Fig. 74. (7) Assemble spur gear 1[...]

  • Page 18

    Back side R epair P 18 / 2 2 < 18 > Assembling needle bearing complete 1. Apply MAKIT A grease RA No.1 to the inside of needle baring complete. 2. Putting needle bearing complete on No.1R165 "Ring spring setting tool B" press gear housing onto the needle bearing complete with arbor press as illustrated in Fig. 79. < 19 > Repla[...]

  • Page 19

    C ircuit diagram P 19 / 2 2 Color index of lead wires Black White Red Blue Clear 1 2 3 4 1 2 C1 C2 M1 M2 Switch Field Noise suppressor Po wer supply cord Brush holder Brush holder Connected to field ore For some countries, noise suppressor of two lead wire type is used, or noise suppressor is not used. LED job light Blue or red Light circiut HR2450[...]

  • Page 20

    W iring diagram P 2 0 / 2 2 Fix field lead wire (black) with lead holder as per the illustration. Fix field lead wire (black) with lead holder as per the illustration. Fix noise suppressor's lead wire (clear) with lead holder as per the illustration. Fix brush holder's lead wire (red) and field lead wire (white) with lead holder as per th[...]

  • Page 21

    C ircuit diagram P 2 1 / 2 2 Color index of lead wires Black White Red Blue Clear 1 2 3 4 1 2 C1 C2 M1 M2 Switch Field Noise suppressor Po wer supply cord Brush holder Brush holder Connected to field ore For some countries, noise suppressor of two lead wire type is used, or noise suppressor is not used. HR2450T[...]

  • Page 22

    W iring diagram P 2 2 / 2 2 Fix field lead wire (black) with lead holder as per the illustration. Fix field lead wire (black) with lead holder as per the illustration. Fix noise suppressor's lead wire (clear) with lead holder as per the illustration. Fix brush holder's lead wire (red) and field lead wire (white) with lead holder as per th[...]