Hitachi W 6VB2, Technical And Service Manual, Page: 12 / 25

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C. Removal of the socket (B) ass'y, gear ass'y and second pinion ass'y
(1) Remove the Gear Cover Ass'y [10] and the Inner Cover Ass'y [23], then the Socket (B) Ass'y [12], Gear
Ass'y [15] and Second Pinion Ass'y [20] can be removed. If the Gear Ass'y [15] is hard to remove, lightly
tap the end surface of the Inner Cover Ass'y [23] with a wood hammer. If the Second Pinion Ass'y [20] is
hard to remove, lightly tap the end surface of the Gear Cover Ass'y [10] with a wood hammer. Be careful
not to lose the Spring [14] on the outer circumference of the Gear Shaft [16] and the Washer [22] on the
outer circumference of the Second Pinion Ass'y [20].
As shown in Fig. 5, insert two flat-blade screwdrivers between the Inner Cover Ass'y [23] and Gear Ass'y
[15] at each side and remove the Gear Ass'y [15], Gear Shaft [16] and Ball Bearing [17] from the Inner
Cover Ass'y as a single unit.
8-2. Reassembly
Reassembly can be accomplished by following the disassembly procedures in reverse. However, special
attention should be given to the following items.
(1) Lubrication
Grease: Hitachi Motor Grease (Code No. 930035)
Application:
(a) Fill a moderate amount of grease in the Gear Cover Ass'y [10]. (If the Gear Cover Ass'y is new, fill it with
7 g of grease.)
(b) Outer circumference and clutch of the Socket (B) Ass'y [12]
(c) Teeth and clutch of the Gear Ass'y [15]
(d) Outer circumference of the Gear Shaft [16]
(e) Teeth and outer circumference of the Second Pinion Ass'y [20]
(f) Teeth of the First Gear [21]
(g) Pinion of the Armature [25]
(2) Tightening torque
Handle cover retaining screws
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
15 --- 25 kg
•
cm (13.0 --- 21.7 Ibs-in)
Cord clip retaining screws
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
15 --- 25 kg
•
cm (13.0 --- 21.7 Ibs-in)
Gear cover retaining screws
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
15 --- 25 kg
•
cm (13.0 --- 21.7 Ibs-in)
Stator retaining screws
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
15 --- 25 kg
•
cm (13.0 --- 21.7 Ibs-in)
Speed control switch retaining screws
• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
4 --- 8 kg
•
cm (3.5 --- 6.9 Ibs-in)
Fig. 5
Inner Cover Ass'y [23]
Gear Shaft [16]
Gear
Ass'y [15]
Flat-blade screwdriver
Flat-blade screwdriver