P 5 / 20
R
epair
[3] DISASSEMBLY/ASSEMBLY
[3] -2. Blowing Mechanism (Impact bolt, Striker, etc.)
Fig. 7
1) In order to replace the inner parts of the blowing mechanism, first remove Crank housing cover after removing
the Chuck section, (Fig. 6)
2) Then remove the assembly of Barrel complete
and Tool holder (Fig. 7).
3) Remove Impact bolt from Tool holder by tapping
the edge of Tool holder with plastic hammer.
(Fig. 8)
Important:
If contaminated with dust, clean up the inside
of Tool holder.
4) O ring 20 is installed under Fluoride ring 25.
If Fluoride ring 25 is worn out, the orange color
of O ring 20 will be visible. (Fig. 9)
In this case, replace Fluoride ring 25 together
with O ring 20 and X ring 18.
Do not replace the Fluoride ring alone.
Remove Crank housing cover from
Crank housing complete while expanding
the rear end.
Using No.1R230 or the like, unscrew four
M6x30 Hex socket head bolts.
Now the assembly of Barrel and Tool holder
can be separated from Crank housing comp.
Hex socket head
bolt M6x30 (4pcs)
Tool holder
Barrel complete
Fig. 6
Crank housing cover
Release the interlock between Crank housing cover
and Crank cap cover.
Crank cap cover
DISASSEMBLING
Crank housing
complete
Fig. 9
O ring 20
(color: orange)
Fluoride ring 25, worn out
X ring 18
Impact bolt
Fig. 8
Impact bolt
Tool holder
Barrel complete
