MODELS
G 10SG/G 12SG
1. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The [Bold] numbers in the descriptions below correspond to the numbers in the Parts List and exploded
assembly diagram for G 10SG and the numbers <Bold> to those in the Parts List and exploded assembly
diagram for G 12SG.
1-1. Disassembly
1-1-1. Replacement of the Armature and Stator
(1) Remove the Brush Caps [47] <46> and take off the Carbon Brushes [48] <47>.
(2) Loosen the four D5 x 25 Tapping Screws [1] <1> which fix the Gear Cover Ass'y [4] <4>, and take off
Inner Cover [9] <9> together with the Armature [10] <10> from the Housing Ass'y [38] <38>.
At this time, make sure that the Rubber Bushing [16] <16> is fitted in the housing ball bearing chamber.
If the Rubber Bushing comes off the housing ball bearing chamber or adheres to the Ball Bearing [15]
<15> reassemble the disc grinder according to 8 - 2. Reassembly.
(3) Loosen the two Tapping Screws (W/Flange) D4 x 45 [58] <57> securing the Tail Cover [55] <54> and
remove the Tail Cover [55] <54>.
(4) Remove the four internal wires from the Stator [13] connected with the Brush Holder [49] <48>, the Pillar
Terminal [44] <44>
(or Connector [45]) and the Switch [50] <49>.
(5) Loosen the two Hex. Hd. Tapping Screws D4 x 70 [12] <12> securing the Stator [13] <13> and remove
the Stator [13] <13> from the Housing Ass'y [38] <38>. If you have any trouble with removing the Stator
[13] <13>, heat the Housing Ass'y [38] <38> to about 60 C for easier dismantling.
1-1-2. Replacement of the Rubber Busing
Insert the J - 201 Spring Hook H - 75 (Special Repair Tool) between the Rubber Bushing [16] <16>
assembled in the Housing Ass'y [38] <38> and the housing ball bearing chamber and pull out the
Rubber Bushing [16] <16>.
1-1-3. Replacement of the Dust Seal
(1) Insert the hooks of the J-204 Bearing Puller (Special Repair Tool, Code No. 970982) between the Ball
Bearing [15] <15> and the Dust Seal [14] <14> and fix the hooks with the wing bolts.Be careful not to
insert the hook too much.
(2) Put the Bearing Puller on an appropriate stand. Push down the armature shaft with a hand press and
pull out the Ball Bearing [15] <15>.
(3) Pull out the Dust Seal [14] <14> from the armature shaft.
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