Makita BHR261 Technical Information page 13

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-6. Needle bearing complete and Oil seal 25
DISASSEMBLING
Fig. 34
Keep Gear housing complete almost upright on Arbor press table, and Press down
Oil seal 25 using 1R252.
Oil seal 25 and Needle bearing complete can be removed from Gear housing complete
with gentle pressure because of their low press fit.
Note: Press down Oil seal 25 carefully to prevent Gear housing complete from falling.
(Contact areas of Gear housing complete to Arbor press table is very small.)
ASSEMBLING
1) Assemble Oil seal 25 to Gear housing complete as illustrated in Figs. 35 and 36.
2) Assemble Needle bearing complete as illustrated in Fig. 37.
Fig. 35
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. 37
Press Needle bearing complete with arbor press and
the outer diameter 40mm end surface of 1R165 until
Needle bearing complete stops.
1R165
Outer diameter: 30mm
Cup washer portion of
Needle bearing complete
1R232
Outer diameter: 36mm
The diameter of Oil seal 25 setting
hole is less than 36mm.
Needle bearing
portion of Needle
bearing complete
Fig. 36
Press Oil seal 25 until it stops with arbor press and
the outer diameter 34mm end surface of 1R164.
Oil seal 25 can be moved to the original position.
Belly side of
Gear housing complete
Face the flat portion of Needle bearing complete
to the belly side of Gear housing complete.
P 13/ 21
1R252
Gear housing
complete
Oil seal 25
Needle bearing
complete
Outer diameter: 30mm
1R164
Outer Diameter: 34mm
The original position of Oil seal 25
Note:
1) Do not use 1R164 in this step.
2) Do not press Needle bearing
portion directly.
3) Much pressure makes Needle
bearing complete deform.
Do not press hard.
4) Be sure to press Cup washer
portion with gentle pressure.
Needle bearing
complete