Disassembly Of The Stator Ass'y; Disassembly Of The First Gear And The Ball Bearing - Hitachi S 15SA Technical Data And Service Manual

8-2. Disassembly of the Stator Ass'y

(1) After taking off the Armature Ass'y [13] <13>, loosen the five Tapping Screws D4 X 20 [26] <26> and remove
the Tail Cover [25] <25>, the Handle Cover [29] <29> and the Fan Guide [16] <16>.
(2) Disconnect the lead wires of the Stator Ass'y [17] <17> from Switch (C) [30] <33>.
Then, disconnect the lead wires of Noise Suppressor <30>.
(3) Disconnect the Brush Terminals [18] <18> from the Brush Holders [21] <21>.
(4) Loosen the two Hex. Hd. Tapping Screws [27] <27>, and remove the lead wire of the Noise Suppressor <30>.
And pull out the lead wires of the Stator Ass'y [17] <17> from the Housing Ass'y [19] <19>.
Then, the Stator Ass'y can be taken out of the Housing Ass'y [19] <19>. If the Stator Ass'y [17] <17> cannot
be easily taken out of the Housing Ass'y [19] <19>, disassembly can be facilitated by heating the Housing
Ass'y to a temperature of approximately 60 ˚C (140 ˚F) in an appropriate heating oven.

8-3. Disassembly of the First Gear and the Ball Bearing

(1) Loosen the four Tapping Screws D5 x 45 [7] <7>, and remove the Gear Cover [8] <8>, together with the
Spindle [4] <4>, the First Gear [9] <9>, and the related parts as a single unit.
(2) Remove the Bearing Caps [3] <3> with the J-21 wrench.
(3) As illustrated in Fig. 5, support the tip of the Gear Cover [8] <8> with a cylindrical jig of inside diameter 35 mm
or more, and push the rear portion of the Spindle [4] <4>.
At this time, the First Gear [9] <9> will come off of the Spindle.
(4) Remove the D12 Retaining Ring [6] <6> from the Spindle [4] <4>, and the Ball Bearing [5] <5> can be
removed from the Spindle [4] <4> with the J-30 bearing puller ass'y (special repair tool, Code No. 970804).
Push
Cylindrical jig
35 mm dia.
Fig. 5
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