Precautions In Disassembly And Reassembly; Disassembly - Hitachi G 18SE3 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 the Models G 23SC3, G 23SE2, G 18SE3 and G 18SG2, and the <Bold> numbers to those
in the Parts List and the exploded assembly diagram for the Models G 23UA2, G 18UA2, and G 18UB2, and the
(Bold) numbers to those in the Parts List and the exploded assembly diagram for the Model G 23UB2.

8-1. Disassembly

(1) Removal of the Armature [13] <13> (13)
1. Open the Lever [31] <31> (31) and loosen the Bolt M8 x 22 [32] <32> (32), and remove the Wheel Guard
Ass'y [36] <36> (36).
2. Loosen the Tapping Screw (W/Flange) D4 x 16 (Black) [49] <48> (49), and remove the Brush Cover [48] <47>
(48).
3. Remove the two Carbon Brushes [50] <49> (50) from the Brush Holders [53] <52> (53).
4. Remove the four Tapping Screws (W/Flange) D5 x 35 [2] <2> (2). The Armature [13] <13> (13) can then be
taken out simultaneously with the Gear Cover Ass'y [5] <5> (5), Packing Gland [27] <27> (27) and related
parts.
5. Remove the four Hex. Socket Hd. Bolts (W/Flange) M5 x 16 [28] <28> (28).
6. After removing the two Seal Lock Screws (W/Sp. Washer) M5 x 14 (Black) [1] <1> (1), the Armature [13] <13>
(13) can be extracted together with the Bearing Cover (A) [12] <12> (12) and related parts.
7. Carefully wrap the Armature [13] <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> (6), and extract the Pinion [7] <7> (7).
8. For the models indicated under Fig. 11, the Ball Bearing 6301DDCMPS2L [10] <10> (10) can be removed from
the Armature [13] <13> (13) by utilizing a J-204 Bearing Puller (special repair tool, Code No. 970982) as
illustrated. After the ball bearing has been removed, Bearing Cover (A) [12] <12> (12) can be easily taken off.
Push
Bearing Puller (Code No. 970982)
Fig. 11
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