Makita HR2230 Technical Information page 12

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epair
[3] DISASSEMBLY/ASSEMBLY
[3] -6. Needle Bearing Complete and Oil Seal 25
ASSEMBLY
1) Assemble Oil seal 25 to Gear housing complete in the order of Figs. 33 and 34.
2) Assemble Needle bearing complete as illustrated in Figs. 35 and 36.
Fig. 33
With 1R232 and arbor press, insert Oil seal 25 until it stops.
In this step, Oil seal 25 is not yet inserted completely
because the outer diameter of 1R232 is bigger than that of
Oil seal setting hole.
Oil Seal 25
Fig. 35
Face the flat portion of Needle bearing complete to
the belly side of Gear housing complete.
Needle bearing complete
Back side
Gear housing complete
Note: The other way is available for removing/ assembling Needle bearing complete.
See Figs. 28 and 29 of next page.
[3] DISASSEMBLY/ASSEMBLY
[3] -6A. Needle Bearing Complete by single
DISASSEMBLY
Fig. A
Strike Gear housing. complete against workbench. Then,
Needle baring complete can be disassembled from Gear
housing complete.
Note: Cover the workbench with something soft to
avoid the damage on gear housing.
1R232
Outer Diameter: 36mm
The diameter of Oil seal 25 setting
hole is less than 36mm.
Flat portion
Belly side
Needle bearing
complete
Fig. 34
Press Oil seal 25 to the initial position with arbor press
and the outer diameter 34mm end surface of 1R164.
Outer Diameter: 30mm
1R164
Outer Diameter: 34mm
The initial position of Oil seal 25
Fig. 36
1R164
Needle Bearing
Complete
Oil Seal 25
ASSEMBLY
Fig. B
Press-fit Needle bearing complete in Gear housing
complete using 1R165 and arbor press.
Back side
Needle bearing
complete
1R165
P 12 / 20
1R164
Press Needle bearing with
arbor press and the outer
diameter 34mm end
surface of 1R164 until
Needle bearing complete
stops.
Gear housing
complete
Belly side
Note: Face the flat portion
to the Belly side of
Gear housing
complete.
Refer to Fig. 35.