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1) Remove two Set plates with which Handles (L) and (R) are assembled to one 
    another as follows: 
    Insert a small slotted screwdriver through the punched hole of Set plate and 
    move Set plate in the direction of the arrow using the screwdriver.  (Fig.1)
2) Remove Housing (R) from Housing (L) by loosening six Bind PT3x6 tapping
    screws.
3) Remove Speed change lever assembly from Gear assembly. (Fig. 2)
4) Remove DC motor from Gear assembly as illustrated in Fig. 3       
5) Separate DC motor from Bracket by loosening two M3x6 Pan head screws.
    (Fig. 4)

1) Fix Motor bracket to DC motor with two M3x6 Pan head screws.
    Note: Align the red marking on DC motor with non-convex portion of 
              Motor bracket. (Fig. 5)
2) Fix Gear assembly to DC motor with bracket and turn Gear assembly 
    clockwise.
    Note: Align the change lever of Gear assembly with the red marking on
              DC motor. (Fig. 3)
3) Fix Speed change lever assembly to the change lever of Gear assembly as 
    illustrated in Fig. 2.
    Note: Set the change lever of Gear assembly in place between two 
              Compression springs 4 on the reverse side of Speed change lever 
              assembly, and insert the emboss of the change lever into one of 
              Compression spring 4. (Fig. 6)  

R

epair

2

4

[2] DISASSEMBLY/ASSEMBLY
[3]-1. DC Motor, Gear Assembly, Speed Change Lever Assembly

Fig. 2

Fig. 4

Fig. 3

DISASSEMBLING

ASSEMBLING

[1] NECESSARY REPAIRING TOOLS

CAUTION: Remove the bit and the battery from the machine for safety before 
                     repair/ maintenance in accordance with the instruction manual! 

Description

Code No.

Use for

1R291

Removing/ Installing Bit sleeve

Fig. 1

Handle (R)

Handle (L)

small slotted 
screwdriver

Set plate
(2pcs.)

Retaining ring S and R pliers

Speed change lever assembly

convex portion of
Motor bracket

change lever of
Gear assembly

change lever of
Gear assembly

Emboss of change lever 
of Gear assembly

DC motor

Turn Gear assembly 
counterclockwise.

Pull out Gear assembly
from DC motor with
Bracket.

DC motor

Motor bracket

M3x6 Pan head screws
(2pcs.)

1 Shift the change lever of Gear 

assembly to the high speed position.

2

3

Fig. 5

Fig. 6

non-convex portion

Compression spring 4

Speed change lever assembly

red marking on
terminal of positive
pole

convex portions

Viewed from the upper position

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