Makita BFT022F Technical Information page 8

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -4. Motor section and Gear ass'y
DISASSEMBLING
(1) Remove Bit holder section, Switch lever, Clutch case and Clutch section (=Clutch assembly) from Housing.
(Figs. 2, 3 and 4)
(2) After removing Brush holder caps and Carbon brushes, remove Housing L from Housing R by unscrewing
eight M3x20 Pan head screws. Then remove Switch unit from Gear ass'y. (Fig. 20)
(3) Disconnect Lead wires of Endbell complete from Switch, then lift up and remove the assembled part of Gear ass'y
and Motor section from Housing R. Then pull off Gear ass'y from Motor section while turning Motor bracket
in the direction of the arrow. (Fig. 21)
(4) Remove Endbell complete from Armature, then pull Armature from Yoke unit. (Fig. 22)
(5) Remove Lock washer by turning it with pliers. Gear ass'y can be disassembled as drawn in Fig. 23.
Fig. 20
Housing L
Pan head screw
M3x20 (8 pcs)
Carbon
brush
Brush
holder cap
Fig. 21
Gear ass'y
Motor section
Lead wire of
Endbell complete
Fig. 22
Disassembling Motor section
Note:
Be careful not to pinch your fingers
between Armature and Yoke unit
when removing/ installing Armature
because Yoke unit has strong magnetic
force and pulls Armature very strongly.
Yoke unit
Armature
Plate
Housing R
Carbon
brush
Lens
Switch
Fig. 23
Endbell complete
Brush
holder cap
Housing R
Disassembling Gear ass'y
Lock washer
Gear case
Carrier
complete A/ B Gear case
Ball bearing Spur gear
6805LLB 13/ 18 (3 pcs)
Switch unit
Gear ass'y
Motor bracket
Internal gear 47 Spur gear
15/ 19 (3 pcs)
Spur gear
complete
P 8/13