-1-
WARNING: Before attempting disassembly, be sure to turn off the power switch and disconnect the
power cord plug from the outlet.
1. Precautions on disassembly and reassembly
[Bold]
numbers in the description below correspond to the item numbers in the parts list and exploded
assembly diagram for the Models G 12SA4 and G 12SA4(S), and
<Bold>
numbers to those for the Models
G 13SB4 and G 13SB4(S).
1. Removal of the armature and stator
(1) Loosen the Tapping Screw (W/Flange) D4 x 20
[51]<51>
and pull out the Tail Cover
[50]<50>
. Remove
the Carbon Brushes (1 Pair)
[38]<38>
from the Brush Holders
[36]<36>
.
(2) Loosen the four Seal Lock Screws (W/Sp. Washer) M4 x 14
[7]<7>
and remove the Packing Gland
[6]<6>
ass'y and Lever Holder
[8]<8>
.
(3) Loosen the four Tapping Screws (W/Flange) D4 x 25
[1]<1>
that fix the Gear Cover
[2]<2>
to remove
the Armature
[24]<24>
from the Housing
[34]<34>
together with the Diffuser
[23]<23>
. At this time,
check that the Rubber Bushing
[33]<33>
is fitted in the housing ball bearing chamber.
(4) Carefully wrap the Armature
[24]<24>
with a soft, clean rag to protect it from being damaged, and clamp
it securely in a vise. Then remove the Special Nut M7
[18]<18>
and extract the Gear and Pinion Set
[25]<25>
.
(5) Disconnect the four internal wires of the Stator
[30]<30>
from the Pushing Button Switch
[40]<40>
and
Brush Holders
[36]<36>
.
(6) Remove the Fan Guide
[29]<29>
and Stator
[30]<30>
from the Housing
[34]<34>
.
NOTE: • If the Stator [30]<30> is hard to be removed from the Housing [34]<34>, heat the Housing
[34]<34> up to about 60°C to facilitate removal. Then pull out the Rubber Bushing
[33]<33>.
• Each internal wire of the Stator [30]<30> is covered with a glass tube. Do not bend the
internal wires repeatedly and do not peel off the glass tubes when removing the Stator
[30]<30> from the Housing [34]<34>. Otherwise, the internal wires may be disconnected.
• Do not apply excessive force to the terminals of the Stator [30]<30> when removing them
from the Pushing Button Switch [40]<40> and Brush Holders [36]<36>. Otherwise, the
terminals of the Stator [30]<30> may be broken.
2. Removal of the rubber bushing
Insert the special repair tool J-201 spring hook (Code No. 970977) between the Rubber Bushing
[33]<33>
assembled in the Housing
[34]<34>
and the housing ball bearing chamber, and then pull out the Rubber
Bushing
[33]<33>
.
3. Removal of the dust seal
(1) Insert the hooks of the J-204 bearing puller between the Ball Bearing 698SS
[32]<32>
and the Dust Seal
[31]<31>
and fix the hooks with the wing bolts.
NOTE: Be careful not to insert the hooks excessively.
(2) Put the bearing puller on an appropriate stand. Press down on the armature shaft with a hand press and
pull out the Ball Bearing 698SS
[32]<32>
.
(3) Pull out the Dust Seal
[31]<31>
from the armature shaft.
Disassembly
REPAIR GUIDE
