Hitachi G 12SA3, Технические данные и руководство по обслуживанию

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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 the Model G 12SA3, and the <Bold> numbers to those in the Parts List and the exploded
assembly diagram for the Model G 13SB3.
8-1. Disassembly
(1) Disassembly of the armature (Fig. 5)
1. Loosen the Machine Screw M5 x 20 [29] <29> and remove the Wheel Guard Ass'y [31] <31> .
2. Loosen the two Tapping Screws (W/Flange) D4 x 45 [51] <57> and remove the Tail Cover [53] <59> .
3. Remove the two Carbon Brushes (1 Pair) [42] <48> from the Brush Holders [43] <49> .
4. Remove the four Tapping Screws D5 x 25 (Black) [1] <1> . The Armature [12] <12> can then be taken out
simultaneously with the Gear Cover Ass'y [4] <4> , Packing Gland [25] <25> , and related parts.
5. Remove the four Seal Lock Screws (W/Sp. Washer) M5 x 16 [26] <26> .
The Packing Gland [25] <25> can then be taken out together with the Spindle [28] <28> and the Gear [20]
<20> .
6. After removing the two Seal Lock Screws (W/Sp. Washer) M4 x 10 [18] <18> , the Armature [12] <12> can be
extracted together with the Bearing Cover [11] <11> and the related parts.
7. Carefully wrap the Armature [12] <12> with a soft, clean rag to protect it from being damaged, and clamp it
securely in a vise. Then, remove the Nut M8 [5] <5> and extract the Pinion [6] <6> .
8. For the models indicated under Fig. 5, the Ball Bearing 629T12DDC3PS2-L [9] <9> can be removed from the
Armature [12] <12> 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 [11] <11> can be easily taken off.
J204 bearing puller (Code No. 970982)