Makita HM1810 Manual page 8

R
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[3] DISASSEMBLY/ASSEMBLY
[3] -3. Disassembling/Assembling Crank Section of AVT
DISASSEMBLING
1) Stopper and Crank box will be visible by removing Motor housing cover set and the assembly of Rear cover and
Handle (switch side).
2) Grasp the projection of Stopper with pliers. While turning Stopper, pull off from Crank box. (Fig. 19)
3) Unscrew four M12x55 hex socket head bolts with hex wrench. (Fig. 20)
Note: Use an appropriate steel pipe to extend the grip of hex wrench for easy removal of the bolts securely fastened
with adhesive.
4) Move Barrel till the connection portion of Balancer comp. and Connecting rod (for balancer reciprocating) is visible.
Now Connecting rod can be removed from Balancer complete and Crank complete as illustrated in Fig. 21.
Fig. 19
Crank box Stopper
5) Remove Crank box from Crank housing by unscrewing four M6x20 Hex socket head bolts. (Fig. 22)
6. Remove Retaining ring R-80 and Flat washer 65 from Crank box. (Fig. 23)
Fig. 22
Hex socket head bolt M6x20 (4pcs)
Crank box
7) Remove Crank by pressing with arbor press.( Fig. 24)
The other Flat washer 65 and Needle bearing 7025 still remain in Crank box in this step.
8) Needle bearing 7025 and the other Flat washer 65 can be removed from Crank box by putting the Crank complete
removed in the previous step on Flat washer 65, then pressing it with arbor press. (Fig. 25)
Fig. 24
Fig. 20
Barrel
Hex wrench
steel pipe
Crank housing
Connecting rod
(for Piston reciprocating)
Fig. 25
Flat washer 65
(the other one)
Needle bearing
7025
Crank box
Crank complete
Fig. 21
Crank complete
Crank box
Balancer complete
Fig. 23
Note: Remove Retaining R-80
using Retaining Ring R Pliers
(No.R005).
Put the removed Crank complete
on Flat washer 65.
P 8 / 20
Connecting rod
Retaining ring R-80
Flat washer 65
Crank box
Flat washer 65
Needle bearing
7025