Hitachi DB 10DL Technical Data And Service Manual page 17

(2) Reassembly of the drive unit
(a) Mount Washer (D) [10] and the Spring [9] to the Gear Case [12] in order.
(b) Screw the Nut [8] in aligning its protrusion with the register mark on the Gear Case [12].
Turn the Nut [8] about 1 turn clockwise so that the register mark on the Nut [8] is aligned with the
register mark on the Gear Case [12]. Check that the Y surface of the Nut [8] is almost aligned with the Z
surface of the Gear Case [12] (Fig. 5).
Screw-in start position
Fig. 5
Y surface
(C) Mount the Click Spring [7] to the notch of the Gear Case [12] aligning the register mark on the Gear
Case [12] with the protrusion of the Click Spring [7]. Mount the Click Spring [7] in the proper direction as
shown in Fig. 6.
Fig. 6
Notch (3 pcs.)
Protrusion of the Nut [8]
Register mark of the
Gear Case [12].
Nut [8]
Spring [9]
Z surface
Washer (D) [10]
Gear Case [12]
Register mark Protrusion
-14-
Screw-in end position
Register mark of the Nut [8]
Register mark of the
Gear Case [12].
Y surface Z surface
Protrusion
Gear Case [12]
Click Spring [7]
Nut [8]
Spring [9]
Washer (D) [10]
Gear Case [12]