Makita HM1801 Technical Information page 11

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[3] DISASSEMBLY/ASSEMBLY
[3] -5. Disassembling/Assembling Tool Holder Section
DISASSEMBLING
1) Remove Tool retainer section from Tool holder 29. (Figs. 22, 23, 24)
2) Separate Tool holder 29 from Barrel by unscrewing four M12x45 Hex socket head bolts as illustrated in Fig. 29.
Note: Use an appropriate steel pipe to extend the grip of hex wrench for easy removal of the bolts securely fastened
with adhesive.
3) Remove Impact bolt by tapping the edge of Tool holder 29. (Fig. 30)
4) Take out X ring 40 from Tool holder 29 using small screwdriver or the like. (Fig. 31)
Now Tool holder 29 can be replaced. If Cylinder B is contaminated with dust, X ring 40 can be damged.
In this case, also replace X ring 40, and clean up the inside of Barrel section.
5) Take out Cylinder B from Barrel by tapping its edge with plastic hammer. (Fig. 32)
6) Take out Impact bolt holder from Cylinder B by tapping its edge with plastic hammer. Then remove O ring 53
from Cylinder B. (Fig. 33)
7) Remove O ring 60 and Rubber ring 54 from Impact bolt holder. (Fig. 34)
Fig. 29
Hex socket head bolt
M12x45 (4pcs)
Barrel
Fig. 32
Barrel
Cylinder B
Impact bolt holder
ASSEMBLING
Do the reverse of the disassemblidng steps.
Note: Do not forget to apply adhesive to M12x45 Hex socket head bolts.
Fig. 30
Steel pipe
Hex wrench
Impact bolt
Tool bolder 29
Fig. 33
Tool bolder 29
Impact bolt holder
Cylinder B
O ring 53
Fig. 31
Barrel
Cylinder B
Tool bolder 29
Fig.34
O ring 60
Impact bolt holder
Rubber ring 54
P 11 / 18
X Ring 40