Makita BST220 Technical Information page 7

R
epair
[4] DISASSEMBLY/ ASSEMBLY
[4]-5. Replacing Gear section
1) Remove DC motor section in accordance with the clause [4]-2.
2) Disassemble Gear section as illustrated in Fig. 23.
Fig. 23
DC motor Flat washer 12
3) Remove Leaf spring from Housing L. (Fig. 24)
4) Cover the pins of Spur gear 7 complete with Internal gear 69. Refer to the direction of Internal gear 69. (Fig. 23)
5) After inserting the pins of Spur gear 7 complete into Spur gears 27 (3pcs.), mount Flat washer 12 on Internal gear 69.
6) Install the assembled parts (Flat washer 12, Internal gear 69, Spur gear 27 (3pcs.) and Spur gear 7 complete) into
Housing L so that the large protrusion of Internal gear 69 can be seen. (Fig. 25)
7) Insert Leaf spring into Housing L. (Inserting Leaf spring into Housing L before installation of the assembled parts
causes difficulty.)
8) Plate and Spur gear 55 complete have to be fixed as illustrated in Fig. 26. Refer to their directions.
Fig. 24
Leaf spring
Fig. 26
Sleeve 5 Flat washer 10
Plate Spur gear 55 complete
Spur gear 27 (3pcs.)
Internal gear 69
Note: Apply a little amount of Makita grease N No.2 to the inner periphery.
Fig. 24
4x18 Tapping screw
Pin10
(To Housing L: Refer to Fig. 18)
Spur gear 7 complete
Note: Apply a little amount of Makita grease
Plane bearing 10
Flat washer 10
large protrusion of Internal gear 69
P 7/ 9
N No.2 to the pins.
(small protrusion)