Makita BO3710 Technical Information page 3

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Armature (cont.)
DISASSEMBLING
7) Armature can be removed from Bearing box by tapping the shaft with plastic hammer. (Fig. 7A)
Note: When it is difficult to remove Armature in the above manner, put 1R027 on Ball bearing 6200DDW and press
down 1R027 as illustrated in Fig. 7B.
8) Apply 1R269 to the clearance between Insulation washer and Ball bearing 607ZZ, and set the legs of 1R269 to Arbor
press to prevent the jaws of 1R269 from being slipped off. Ball bearing 607ZZ can be removed with vise and 1R269.
(Fig. 8)
9) Install M5x16 Countersunk head screw temporarily to the Armature shaft, and then remove Ball bearing 6200DDW
without damage to the thread of Armature shaft. (Fig. 9) Flat washer 10 can be removed.
Fig. 7A
Fig. 8
Ball bearing
6200DDW
Flat washer 10
Ball bearing 607ZZ
Insulation
washer
ASSEMBLING
Take the disassembling step in reverse.
Note: 1) Do not fail to set Flat washer 10 on the drive end of Armature shaft before pressfit Ball bearing 6200DDW in place.
(Figs. Figs. 9 and 8) Face the protrusion of Flat washer 10 to Ball bearing 6200DDW.
2) Be sure to install O ring 53 into Base. (Fig. 2)
3) Flat washer 8 has to be put between Ball bearing 6202DDW and Fan 68. (Fig. 4)
Fig. 7B
Ball bearing
6200DDW
Fig. 9
1R269
Ball bearing 6200DDW
1R027
Ball bearing
6200DDW
M5x16 Countersunk head screw
P 3/ 7
protrusion
Flat washer 10