Makita BBC231U Series Technical Information page 5

R
epair
[3]-2. Gear case assembly (for all models)
1) Remove Gear case assembly from Shaft pipe. Refer to the previous page.
2) Remove M8x10 Hex bolt with plain washer 8. (Fig. 14)
Note: Do not miss them. The installation hole on Gear case assembly is a pouring spout of lubricant to gear teeth.
If they are not seated on, Gear case assembly leaks lubricant.
3) Remove Retaining ring R-24 using 1R006. (Fig. 14)
4) Strike Gear case assembly against worktable. Spiral bevel gear 14 with Ball bearing 609ZZ and Retaining ring S-9
can be removed. (Fig. 15)
5) Remove Retaining ring S-9 using 1R291.
6) Separate Ball bearing 609ZZ from Spiral bevel gear 14 using arbor press, 1R282 and 1R031 as illustrated in Fig. 16.
The parts mentioned above are as shown in Fig. 17.
Fig. 14
M8x10 Hex bolt with
plain washer 8
Retaining
ring R-24
Fig. 15
Assembled part
*Spiral bevel gear 14
*Ball bearing 609ZZ
*Retaining ring S-9
7) Remove Retaining ring R-28 using 1R291. (Fig. 18)
8) Assemble 1R033 and Receive washer to Cutter shaft by tightening M10-17 Hex nut,
and then tap Gear case assembly using plastic hammer as illustrated in Fig. 19.
Cutter shaft with Ball bearing 6001LLU can be removed by the weight of 1R033.
The parts mentioned above are shown in Fig. 20.
Note: 1) The following parts are not included in models BBC300L and AT-3630.
Therefore, they are not shown in Fig. 20. However, use M10-17 Hex nut and
1R033 to remove Cutter shaft for BBC300L and AT-3630.
*Clamp washer
2) Refer to the instruction manual and the parts breakdown, and set Receive
washer in place when assembling.
9) Remove Ball bearing 6001LLU from Cutter shaft using 1R045.
Fig. 19
1R033
M10-17 Hex nut
Plastic hammer
Fig. 16
Inside view
Arbor press
1R282
Ball bearing
609ZZ
Spiral bevel
gear 14
1R031
*Cup *M10-17 Hex nut
Fig. 20
Receive washer
Fig. 17
Ball bearing
609ZZ
Ball bearing 6001LLU
Retaining
ring R-28
M8x10 Hex bolt with
plain washer 8
Spiral bevel
gear 14
Retaining ring S-9
Retaining ring R-24
Fig. 18
Retaining
ring R-28
Cutter shaft
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