Disassembly Of The Stator Ass'y; Disassembly Of The Final Gear And The Ball Bearing - Hitachi SP 18SA Technical And Service Manual

8-2. Disassembly of the Stator Ass'y

(1) After taking off the Armature Ass'y [17], loosen the five Tapping Screws D4 X 20 [30] and remove the Tail
Cover [29], the Handle Cover [33] and the Fan Guide [20].
(2) Disconnect the lead wires of the Stator Ass'y [21] from Switch (C) [37].
Then, disconnect the lead wires of Noise Suppressor [34].
(3) Disconnect the Brush Terminals [22] from the Brush Holders [25].
(4) Loosen the two Hex. Hd. Tapping Screws [31], and remove the lead wire of the Noise Suppressor [34].
And pull out the lead wires of the Stator Ass'y [21] from the Housing Ass'y [23]. Then, the Stator Ass'y can be
taken out of the Housing Ass'y [23]. If the Stator Ass'y [21] cannot be easily taken out of the Housing Ass'y
[23], 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 Final Gear and the Ball Bearing

(1) Loosen the four Tapping Screws D5 x 55 [7], and remove the Gear Cover [8], together with the Spindle [4], the
Final Gear [16], and the related parts as a single unit. Then, the Second Pinion [10] and Washer [11] can be
removed easily.
(2) Remove the Bearing Caps [3] with the J-21 wrench.
(3) As illustrated in Fig. 5, support the tip of the Gear Cover [8] with a cylindrical jig of inside diameter 35 mm or
more, and push the rear portion of the Spindle [4]. At this time, the Final Gear [16] will come off of the
Spindle.
(4) Remove the D12 Retaining Ring [6] from the Spindle [4], and the Ball Bearing [5] can be removed from the
Spindle [4] with the J-30 bearing puller ass'y (special repair tool, Code No. 970804).
Push
Cylindrical jig
35 mm dia.
Fig. 5
--- 9 ---