Precautions In Disassembly And Reassembly; Disassembly - Hitachi PDA-100G Technical Data And Service Manual

(2) Never press the pushing button while the depressed center wheel is rotating.

If the pushing button (Fig. 2) is pressed while the depressed center wheel is rotating, the spindle will stop

immediately. In such a case, there is a danger that the wheel nut may be loosened, so that the depressed

center wheel flies out unexpectedly and may cause possibly serious injury.

The [Bold] numbers in the descriptions below correspond to the item numbers in the Parts List and the exploded

assembly diagram for Model PDA-100G, and the numbers to those in the Parts List and the exploded

assembly diagram for Model G 10SK2.

(1) Disassembly of the armature

1) Remove the Brush Caps [42] <41>, and take out the Carbon Brushes [43] <42>.

2) Loosen the four Machine Screws M5 x 22 [1] or the four Tapping Screws D5 x 25 <1> which fix the Gear

Cover Ass'y [4] <3> to remove the Armature [9] <8> from the Housing Ass'y [37] <36> together with the

Bearing Holder [8] <7>.

3) Loosen the Special Nut M7 [5] <4> which fixes the Pinion [6] <5> to remove the Pinion [6] <5>.

4) Insert the hooks of the J-204 bearing puller between the Ball Bearing 628VVC2PS2-L [7] <6> and the

Bearing Holder [8] <7> from both sides and fix the hooks with the wing bolts.

5) Place the J-204 bearing puller on a supporting jig and push down on the tip of the armature shaft with a

hand press to remove the Ball Bearing 628VVC2PS2-L [7] <6>. Then remove the Bearing Holder [8] <7>.

(2) Disassembly of the dust seal

1) Insert the hooks of the J-204 bearing puller between the commutator and the Dust Seal [13] <12> from both

sides, and fix the hooks with the wing bolts.

2) Place the J-204 bearing puller on a supporting jig and push down on the armature shaft with a hand press

to remove the Dust Seal [13] <12> together with the Ball Bearing 626VVC2PS2L [14] <13>. Replace the

Dust Seal [13] <12> with new one because it is damaged by the removal of the Ball Bearing 626VVC2PS2L

[14] <13>.

(3) Disassembly of the Stator (A)

1) Remove the Armature [9] <8> and loosen the Tapping Screw (W/Flange) D4 x 25 (Black) [51] <50> to

remove Tail Cover (B) [50] <49>.

2) Loosen the two Machine Screws (W/Washer) M3.5 x 6 [52] <51> that secure the internal wire of the Cord

[58] <57> and Stator (A) [12] <11> to the Switch (1P Screw Type) [53] <52> and loosen the two screws of

the Pillar Terminal [47] <46>. Remove the two internal wires from the Cord [58] <57> and the Piller

Terminal [47] <46>.

3) Remove the Tapping Screw (W/Flange) D4 x 40 [41] <40> and the Tapping Screw (W/Flange) D4 x 20

(Black) [40] <39>. Remove Tail Cover (A) [39] <38> then remove the Earth Terminal [45] <44> from the

Housing Ass'y [37] <36>.

4) Disconnect the two internal wires of Stator (A) [12] <11> coming from the Brush Holder [44] <43>

from Stator (A) [12] <11>.

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