Precautions In Disassembly And Reassembly; Disassembly - Hitachi G 18SH2 Technical Data And Service Manual

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 23SF2 and G 18SH2, and the <Bold> numbers to those in the Parts List and the
exploded assembly diagram for G 23U2 and G 18U2.

8-1. Disassembly

(1) Removal of the Armature [13] <13>
1. Loosen the Bolt M8 x 22 [28] <28>, and remove the Wheel Guard Ass'y [29] <29>.
2. Loosen the Tapping Screw (W/Flange) D4 x 16 (Black) [46] <46>, and remove the Brush Cover [41] <41>.
3. Remove the two Carbon Brushes [43] <43> from the Brush Holders [48] <48>.
4. Remove the four Tapping Screws (W/Flange) D5 x 35 [2] <2>. The Armature [13] <13> can then be taken out
simultaneously with the Gear Cover Ass'y [5] <5>, Packing Gland [26] <26>, and related parts.
5. Remove the four Hex. Socket Hd. Bolts (W/Flange) M5 x 16 [27] <27>.
6. After removing the two Seal Lock Screws (W/SP. Washer) M5 x 14 (Black) [1] <1>, the Armature [13] <13> can
be extracted together with the Bearing Cover (A) [12] <12>, and related parts.
7. Carefully wrap the Armature [13] <13> with a soft, clean rag to protect it from being damaged, and clamp it
securely in a vise. Then, remove the Special Nut M10 [6] <6>, and extract the Pinion [7] <7>.
8. For the models indicated under Fig. 9, the Ball Bearing 6301DDCMPS2L [10] <10> can be removed from the
Armature [13] <13> 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 (A) [12] <12> can be easily taken off.
Push
Bearing Puller (Code No. 970982)
Fig. 9
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