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Description Cordless Driver Drill ONCEPT AND MAIN APPLICATIONS Model BDF446 is the upgraded version of model BDF442, featuring: • More compact and lightweight design than BDF442 • More comfortable operation will be provided by redesigned ergonomic grip • Compatible with the 14.4V Li-ion batteries equipped with the Battery protection circuit...
P 2/ 10 epair CAUTION: Repair the machine in accordance with “Instruction manual” or “Safety instructions”. [1] NECESSARY REPAIRING TOOLS Code No. Description Use for Hex Wrench 10 removing / mounting Drill chuck (Use this tool if Drill chuck cannot be removed by the method 1R359 Drill chuck removing tool described in “...
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P 3/ 10 epair [3] DISASSEMBLY/ASSEMBLY [3]-1. Drill Chuck (cont.) DISASSEMBLING (2) Remove Drill chuck. (Fig. 4) Fig. 4 *Note: The rotational direction is viewed from operator. 1. Grip Hex wrench 10 with Drill chuck and hold Machine. Important: Be sure to hold the grip of Machine tightly with sufficient counterclockwise* force against clockwise* recoil force of Machine.
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P 4/ 10 epair [3] DISASSEMBLY/ASSEMBLY [3]-1. Drill Chuck (cont.) ASSEMBLING (3) Tighten Drill chuck. (Fig. 7) Fig. 7 *Note: The rotational direction is viewed from operator 4. Open Keyless drill chuck fully, then drive M6x22 Flat head screw 1. Grip Hex wrench 10 with Drill chuck and hold Machine. by turning counterclockwise* Important: with Impact driver.
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P 5/ 10 epair [3] DISASSEMBLY/ASSEMBLY [3]-2. Gear assembly and Motor section (cont.) DISASSEMBLING (3) Disassemble Gear assembly and Motor section. (Fig. 9) Fig. 9 3. Unscrew nine 3x16 Tapping screws, 4. Remove the assembly of 5. Remove Speed change lever, then remove Housing (R).
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P 6/ 10 epair [3] DISASSEMBLY/ASSEMBLY [3]-2. Gear assembly and Motor section (cont.) ASSEMBLING (3) Put Leaf spring in place on the inside of Housing (L). (Fig. 10) Fig. 10 Housing (L) Leaf spring Be sure to put Leaf spring in place as drawn on the right.
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P 7/ 10 epair [3] DISASSEMBLY/ASSEMBLY [3]-2. Gear assembly and Motor section (cont.) ASSEMBLING (5) Engage the notch of Yoke unit with the projection inside of Housing (L) when mounting the assembly of Gear section and Motor section to Housing (L). (Fig. 12) Fig.
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P 8/ 10 epair [3] DISASSEMBLY/ASSEMBLY [3]-3. Speed change lever ASSEMBLING Assemble Speed change lever to Gear assembly. (Fig. 14) Fig. 14 2. Mount Speed change lever to 3. Set Speed change lever to either 1. Be sure to put two Gear assembly.
P / 1 ircuit diagram Fig. D-1 Color index of lead wires' sheath Black White Yellow Brush holder job light complete FET (Field effect transistor) Line filter Line filter is not used for some countries. Switch Connector Terminal...
P 1 / 1 iring diagram Fig. D-2 Lead wire wiring of Brush holder complete 1. Pass Lead wires of Brush holder complete 2. Assemble Receptacles to Lead wires. through Line filter if it is used. Line filter Line filter Line filter is not used Receptacle for some countries.