Makita BDF458 (LXFD03*1) ユーザーズマニュアル

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DISASSEMBLING

1. Remove two 3x16 Tapping screws and Rear cover. 

    And remove four 4x18 Tapping screws. 

After removing Drill chuck (Re: Figs. 1, 2, 3 and 4), disassemble Motor section and Gear assembly. (Figs. 8 and 9) 

2. Remove Housing R, unscrewing 

    seven 3x16 Tapping screws. 

3. Pull out Heat sink section, and remove Gear assembly 

    together with Motor section and Speed change lever.

4. Remove Speed change lever and Motor section 

    from Gear assembly.

Gear assembly

Speed change lever

Motor section

Motor section

Rear cover

3x16 Tapping 

screw (2 pcs.) 4x18 Tapping

screw (4 pcs.)

3x16 Tapping screw (7 pcs.)

Heat sink 

section

Speed change 

lever assembly

rear 

Compression 

spring 4 

front Compression spring 4 compressed

by the lever of Gear assembly 

Drill chuck side

Motor side

Drill chuck side

Motor side

5. Push Speed change lever assembly toward Motor side 

    until it stops to have space between the pin on the lever 

    of Gear assembly and rear Compression spring 4.

6. Lifting up Motor side of Speed change lever assembly, 

    pull it toward the direction designated with arrow.

Space between rear Compression spring 4

and the pin on the lever of Gear assembly.

Pin on 

the lever of 

Gear assembly

Torsion spring

Carbon brush

Brush holder complete

Yoke unit

Armature

Note: Pay attention not to pinch your finger between Yoke unit and Armature when removing. 

          Do not scratch the copper wires of Armature. Yoke unit draws Armature by its considerable

          strong magnet force.

5. Shift the tail of Torsion spring from top of Carbon 

    brush to the Notch of Brush holder. Carbon brush

    gets free from the pressure of Torsion spring.

6. From Armature, pull off Brush holder complete and Yoke unit.