For All Models - Makita BBC231U Series Technical Information

R
epair
[3] DISASSEMBLY/ ASSEMBLY
[3]-1A. Shaft pipe complete (for BBC300L and AT-3630)
DISASSEMBLING
1) Loosen two M6x30 Hex socket head bolts, and then remove Protector and
Protector extension complete. (Fig. 2A)
2) Enlarge the clamp pitch of Protector cover carefully and slide two holes of
Protector cover from the bolts-heads of two
M5x14 Hex socket head bolts. (Fig. 3) Protector cover can be removed.
3) Remove two M5x14 Hex socket head bolts and separate Protector clamp from
Gear case assembly.
Then loosen M5x25 Hex socket head bolt as the clamp of Gear case assembly. (Fig. 4)
Gear case assembly can be pulled out from Shaft pipe.
4) Remove four M6x30 Pan head screws. Loop handle 24 and Handle clamp 24 can be
removed. (Fig. 5A)
5) Remove M5x20 Pan head screw. M5x18 Hex socket head screw with washer & spring
washer, and eight 4x18 Tapping screws. Grip L and Grip R can be removed. (Fig. 5B)
6) Remove M5x20 Pan head screw and M5x20 Hex socket head bolt. And then separate
Pipe bracket cover from Pipe bracket by sliding Pipe bracket cover itself
in the direction designated as illustrated in Fig. 6
7) Pull out Shaft pipe and Shaft from Pipe bracket by hand.
Refer to Fig. 7.
Note: When removing Shaft is difficult, pull out Shaft with water pump pliers. (Fig. 8)
8) Remove four M4x12 screws and Battery guard. (Fig. 9)
9) Remove two 5x25 Tapping screws that fastens Gear box and Housing R, and remove five 4x18 Tapping screws. (Fig. 10)
Housing R can be removed.
10) Disconnect Power supply cord unit and Controller complete by removing their connectors.
Then remove 4x18 Tapping screw and Strain relief from Housing L. (Fig. 11)
11) Remove Pipe rubber, Pipe bracket cover and Shaft from Shaft pipe.
Note: Receive the end of Shaft pipe on wood and tap Cushion with plastic hammer to remove Cushion from Shaft pipe
without difficulty. Refer to Fig. 12.
Fig. 5A
M5x30 Pan head
screw (4pcs.)
Shaft pipe
Handle
clamp 24
ASSEMBLING

For all models

Take the disassembling step in reverse.
Note: Shaft pipe have two holes around the both ends. Install Hanger and Cushion to Shaft pipe from the specific side
that the distance between the hole and the end is long. (Fig. 13)
Fig. 13
Hole of Shaft pipe
long
Fig. 5B
M5x18 Hex socket head screw
Loop
with washer & spring washer
handle
24
4x18 Tapping screw (8pcs.)
Cushion Hanger
Fig. 2A
M6x30 Hex
socket head
bolt (2pcs.)
O ring 11
(2pcs.)
Protector
Protector
extension complete
M5x20 Pan head screw
P 4/ 12
Fig. 12
Cushion
Shaft pipe
Wood
Hole of Shaft pipe
short