Makita GA7050R Instructions Manual page 3

R
epair
[3] DISASSEMBLY/ASSEMBLY
[3]-1. Armature, Spiral bevel gear (small), Ball bearing 6201DDW, Ball bearing 6000DDW
DISASSEMBLING
(1) Disassemble Armature assembly and Small spiral bevel gear as illustrated in Figs. 2 and 3.
Fig. 2
Remove Carbon brushes. And then,
remove four 5x35 Tapping screws.
5x35 Tapping screw (4pcs.)
Carbon brush
Brush holder cap
Fig. 3
Locking M7 Hex nut with wrench,
turn Armature clockwise by hand.
M7
Hex nut
Wrench for locking M7 Hex nut
(2) Disassemble Ball bearing 6201DDW as illustrated in Figs. 4 and 5.
Fig. 4
Remove Retaining ring (INT)
R-32 with 1R005 from Gear
housing complete.
Retaining
ring (INT)
R-32
Ball bearing 6201DDW
(3) Disassemble Armature section as illustrated in Fig. 6.
Fig. 6
Remove M7 Hex nut and Small spiral bevel gear again. Ball bearing 6201DDW can be removed by hand.
Remove Rubber ring 26 from Ball bearing 6000DDW by hand.
Insert the jaws of 1R269 between Ball bearing 6000DDW and Insulation washer, and remove Ball bearing 6000DDW.
Small spiral bevel gear
M7 Hex nut
Ball bearing 6201DDW
Separate Gear housing complete
from Motor housing complete
together with Armature assembly.
Gear housing complete
Armature assembly
Armature can be pulled off.
Do not lose M7 Hex nut.
Fig. 5
Assemble Armature assembly and Small spiral bevel gear. Tighten
M7 Hex nut provisionally by turning clockwise. (Refer to Fig. 3.)
M7 Hex nut
Felt ring 16 Ball bearing
6201DDW
Fan 80 Ball bearing 6000DDW
Insulation washer
Separate Bearing box from Gear
housing complete by removing
four M5x16 Hex socket head bolts.
Motor housing
complete
Note
If the work is very difficult due to the seizing
of Small spiral bevel gear, spray lubricant
between Armature shaft and Small spiral
M7 Hex nut
bevel gear. And then turn and pull Armature
while holding Small spiral bevel gear with
Small spiral
pliers and a cloth.
bevel gear
Armature
Small spiral
Ball bearing 6201DDW can be
bevel gear
removed together with Armature
by tapping the end of Gear housing
complete with a plastic hammer.
Felt ring 16 can be removed
together with Armature.
Note: Do not mistake the directions of
Insulation washer and Rubber ring 26
when setting them in place.
Rubber ring 26
P 3/ 8
Bearing box
M5x16 Hex socket
head bolt (4pcs.)