Makita HM1213C Technical Information page 10

R
epair
[3] ASSEMBLY/ DISASSEMBLY
[3]-4. Crank section
DISASSEMBLING
(6) Disassemble Crank section as illustrated in Figs. 21, 22 and 23.
Fig. 21
Disassemble Gear housing complete
with Armature from Crank housing.
Gear housing
complete
Armature
Fig. 22
Set Crank pin at dead point on Handle
assembling side as illustrated bellow.
Crank pin at dead center point
of Connecting rod
Fig. 23
Replace O ring 35 and O ring 31.5 with the new ones in the following cases.
* When damage or wear is recognized.
* When carbon brush is replaced.
O ring 35
Disassemble Crank cap cover, Crank
cap, Seal ring by unscrewing four
M4x18 Pan head screws.
M4x18 Pan head screw (4pcs.)
Crank cap cover
Crank cap
1 Strike Crank housing as illustrated below. Crank shaft is
removed together with Helical gear 57 and Ball bearing 6206LLU.
Connecting rod
2 Piston can be removed together with Connecting rod.
Piston
Crank cap
Seal ring
1
O ring 31.5
P 10/ 17
Filter can be removed
from Crank cap.
Filter
Remove Air pipe
(only for HM1213C).
Air pipe
Flat washer 12
Helical gear 57
Ball bearing 6206LLU
Crank shaft
Connecting rod
Piston
2