![background image](http://html1.mh-extra.com/html/makita/btm40/btm40_technical-information_4246063005.webp)
P 5/ 10
R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Bearing Box Section and Crank Housing Section
Fig. 6
DISASSEMBLING
1. Remove O ring 8 from Crank shaft, then remove Bearing retainer
by unscrewing three M4x12 Hex socket head bolts.
(1) Disassemble Crank housing complete from Motor housing. (
Fig. 3
)
(2) Remove Bearing box section from Crank housing complete, then remove Crank shaft from Bearing box. (
Fig. 6
)
Note:
1.
No need to remove Battery housings (R) and (L) and Handle cover.
2.
You must replace Crank housing complete as a unit, because it is a
factory-assembled part and cannot be disassembled.
Bearing box section can be assembled by reversing
the disassembly procedure. (
Fig. 6
)
ASSEMBLING
Note in Assembling:
Do not forget to mount O ring 8 onto Crank shaft.
(
Fig. 7
)
M4x12 Hex socket
head bolt (3 pcs.)
2. Insert the tips of 1R003 into the pin holes
of Bearing box, then pull out Bearing box
from Crank housing complete while
turning it with 1R003.
1R232
Crank section
3. Remove Retaining ring S-7 from Crank shaft with 1R291,
then remove Crank section from Bearing box using
arbor press and 1R232.
4. From Crank shaft, remove Sphere bearing 706,
then remove Ball bearing 6000DDW with 1R269.
Bearing box
Crank shaft
Sphere bearing 706
Ball bearing 6000DDW
Crank shaft
1R269
Bearing retainer
O Ring 8
Crank housing
complete
O ring 8
Fig. 7
Crank shaft
Crank housing section
1R003
Bearing box
Retaining
ring S-7
1R291