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ECHNICAL INFORMATION PRODUCT P 1 / 14 Models No. BHR240 Description Cordless Rotary Hammer ONCEPT AND MAIN APPLICATIONS The cordless version of HR2453/HR2454 has been launched with D-handle for operator's comfort. These new products will be available in the following variations.
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P 2 /14 epair CAUTION: Remove the battery from the machine for safety before repair/ maintenance ! [1] NECESSARY REPAIRING TOOLS Item No. Description Purpose Retaining ring S pliers ST-2N Removing/ installing Ring spring 19 1R003 1R004 Retaining ring S pliers ST-2 Removing/ installing Ring spring 29 1R022 Bearing plate...
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P 3 /14 epair [2] -2. Makita Grease RB No.00 Item No. Description Portion to lubricate Amount to apply Cap 35 Inside surface that contacts hammer bit Ring 21 Inner circumference that contacts Tool holder comp. appropriate amount Change lever comp.
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P 4 /14 epair [3] DISASSEMBLY/ASSEMBLY [3] -1. Chuck Section DISASSEMBLING 1) Slide Chuck cover in the direction of Gear housing. Fig. 3 Remove Cap 35 using hand and a slotted screwdriver (Fig. 3). 2) Remove Ring spring 19 from the groove on Tool holder complete Gear housing using 1R003 and 1R212.
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P 5 /14 epair [3] DISASSEMBLY/ASSEMBLY [3] -2. Change Lever Fig. 7 Change lever DISASSEMBLING 1) Lever up Cap from Change lever using two slotted screwdrivers (Fig. 7). Note: Lock button and Compression spring 3 will fly away in this step. Be careful not to lose them.
P 6 /14 epair [3] DISASSEMBLY/ASSEMBLY [3] -3. Armature DISASSEMBLING 1) Remove Brush holder cap and Carbon brush from Motor housing. (left in Fig. 12) 2) Separate the assembly of Gear housing armature from Motor housing by unscrewing four 4x40 Tapping screws. (right in Fig.
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P 7 / 14 epair [3] DISASSEMBLY/ASSEMBLY [3] -4. Tool Holder Complete and Spur Gear 51 (cont.) DISASSEMBLING 5) Attach two 1R022 to 1R306. Install them on arbor press as illustrated to left in Fig. 16. 6) Applying two 1R022 to Washer 31, press them down using arbor press in order to remove the force of Compression spring 32 from Ring spring 29 (center of Fig.
P 8 /14 epair [3] DISASSEMBLY/ASSEMBLY [3] -5. Impact Bolt Section (cont.) DISASSEMBLING 5) Ring spring 28 can be pulled off from Tool holder complete when completely Fig. 20 removed from the groove (Fig. 20). Ring spring 28 Note: Ring spring 28 will be damaged or deformed in the steps 4) and 5). Be sure to replace damaged/deformed Ring spring 28 when assembling Tool holder section.
P 9/14 epair [3] DISASSEMBLY/ASSEMBLY [3] -6. Swash Bearing Section (cont.) DISASSEMBLING 4) Move Piston cylinder to the rear dead center position (Fig. 26). 5) Remove Swash bearing section from Inner housing by pulling in the direction of the arrow (Fig. 27). Fig.
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P 10/14 epair [3] DISASSEMBLY/ASSEMBLY [3] -6. Swash Bearing Section (cont.) DISASSEMBLING 9) Remove Helical gear 25 using 1R022, 1R023 and 1R281 as illustrated to left in Fig. 31. Swash bearing 10 and Clutch cam can now be removed by hand (right in Fig. 31). 10) Remove retaining ring S-7 using No.1R291 (left in Fig.
P 11 /14 epair [3] DISASSEMBLY/ASSEMBLY [3] -6. Swash Bearing Section (cont.) Fig. 36 ASSEMBLING Piston cylinder in the rear 4) Move Piston cylinder to the rear dead center position. Tilt Swash bearing 10 dead center position to set at the same angle as in the rear dead position. Insert the pin portion of Swash bearing 10 through Inner housing into the Inner housing hole of Piston joint.
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2) Applying 1R164 to Oil seal 25 inserted halfway into Gear housing complete, press down Gear housing complete using arbor press until it stops. (right in Fig. 40) 3) Apply Makita grease RB No.00 to the inside surface of Needle bearing complete. 4) Applying 1R164 onto Needle bearing complete, set them to Gear housing complete.
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P 13 /14 ircuit diagram Fig. D-1 Color index of lead wires' sheath Black Yellow Blue End bell Complete Switch Yoke Unit Tape to bundle Heat Sink the lead wires F E T Terminal...
P 14 / 14 iring diagram Fig. D-2 Connecting terminal of M2 side can be inflected toward the direction designated with arrow in order to avoid pinching of lead wire, if it is necessary. Fix the End bell's lead wires Terminal M2 (black and red) with lead wire holder.