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Fig. 5
8. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The [Bold] numbers in the descriptions below correspond to the numbers in the Parts List and the exploded
assembly diagram for G 12SA2, and the <Bold> numbers to those in the Parts List and the exploded assembly
diagram for G 13SB2.
8-1. Disassembly
(1) Removal of the Armature [14] <14>
1. Loosen the Machine Screw M5 x 20 [32] <32>, and remove the Wheel Guard Ass'y [34] <34>.
2. Loosen the Tapping Screw (W/Flange) D4 x 16 (Black) [56] <55>, and remove the Tail Cover [55] <54>.
3. Remove the two Carbon Brushes [46] <45> from the Brush Holders [47] <46>.
4. Remove the four Tapping Screws D5 x 25 [1] <1>. The Armature [14] <14> can then be taken out
simultaneously with the Gear Cover Ass'y [4] <4>, Packing Gland [28] <28>, and related parts.
5. Remove the four Seal Lock Screws (W/SP. Washer) M5 x 16 [29] <29>.
6. After removing the three Seal Lock Screws (W/SP. Washer) M4 x 10 [20] <20>, the Armature [14] <14> can be
extracted together with the Bearing Cover [13] <13>, and related parts.
7. Carefully wrap the Armature [14] <14> with a soft, clean rag to protect it from being damaged, and clamp it
securely in a vise. Then, remove the Special Nut M7 [6] <6>, and extract the Pinion [7] <7>.
8. For the models indicated under Fig. 5, the Ball Bearing [10] <10> can be removed from the Armature [14]
<14> by utilizing a J-204 Bearing Puller (special repair tool, Code No. 970982) as illustrated. After the Ball
Bearing has been removed, the Bearing Cover [13] <13> can be easily taken off.
Bearing Puller (Code No. 970982)
