Parts List

Repair
[3] DISASSEMBLY/ASSEMBLY
[3] -1. Drill chuck (cont.)
[3] -2. Gear assembly, Rotor, Stator assembly, Speed change lever assembly
DISASSEMBLING
DISASSEMBLING
ASSEMBLING
Fig. 9
Fig. 10
(6) Set the lever portion of Gear assembly to 1st gear position. (Fig. 6)
Set Gear assembly in drill mode. (Refer to Fig. 7.)
Tighten two 921477-5 evenly while keeping 1R404-B parallel with
1R404-A, and then tighten M5x10 Thumb screw of 1R404-B. (Fig. 6)
(8) Hold 1R404 in Vise as drawn in Fig. 7.
Secure 1R298 to Drill chuck and attach 1R264 to 1R298. (Fig. 8)
(9) Turn 1R264 counterclockwise to remove Drill chuck. (Fig. 8)
Note: When it is impossible to remove Drill chuck, try the steps
with 1R359 mentioned in Makita repair tool list.
Assemble by reversing the disassembly procedure.
Note: • When you turn 1R264 clockwise to assemble Drill chuck to Spindle, the tightening torque should be 65 up to 72.5
N∙m (660 up to 740 kgf∙cm).
• M6x22 (-) flat head screw is thread locker type, and therefore, apply ThreeBond 1342H/ Loctite 243 to the thread
and tighten the screw using Cordless impact driver with slotted bit.
(1) Remove nine Bind PT3x14 tapping screws and four 4x18
Tapping screw, and then separate Rear cover and Housing R
from Housing L. (Fig. 1 of the previous page and Fig. 9)
(2) Remove the following parts from Housing L at a time. (Fig. 10)
• Gear assembly with Drill chuck
• Motor section
• Speed change lever assembly
(3) Remove Speed change lever assembly from Gear assembly,
and then separate Motor section from Gear assembly. (Fig. 11)
(4) Put Rotor section on a workbench so that the drive end of Rotor
touches the workbench.
Press Stator down to separate from Rotor. (Fig. 12)
Fig. 11 Fig. 12
P 3/ 11
wide side
1R298
1R404
Fig. 7
Fig. 8
1R404
narrow
side
1R264
Vise
1R404-A
1R404-B
Keep 1R404-B parallel
with 1R404-A.
M5x10
Thumb
screw
Fig. 6
Lever portion of Gear assembly
921477-5 (2 pcs.)
1R404
Shaft of
1R404-C
1R404
Speed change lever assembly
Gear assemblyMotor section
4x18 Tapping
screw (9 pcs.)
Rear cover
Housing RHousing L
Stator
Rotor
Set Gear assembly
in drill mode.