Hitachi DS 18DMR Service Manual page 32

(c) Mounting the Click Spring [11] and the Front Cap [4].
Mount the Click Spring [11] to the Front Case [10].
1
2 Mount the Front Cap [4].
Check that the protrusion of the Click Spring [11] is inserted into the groove inside the Front Cap [4].
(6) Reassembly of the main unit
(a) Mount the power supply unit and the drive unit that were reassembled in the above procedure to Housing
(A) [36]. At this time, align the protrusions of the Brush Block [31], Front Case [10] and Motor Spacer [28]
with the concave portions of Housing (A) [36], the notch of the Magnet [30] with the protrusion of Housing
(A) [36], and the groove of the Front Cap [4] with the protrusion of Housing (A) [36] (see Fig. 13).
Protrusion
[19]
Protrusion
[28]
[30]
Notch Protrusion
Concave portion
Concave portion
[36]
Protrusion
Protrusion
Concave portion
Fig. 13
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[10]
[4]
Groove
Concave portion
Protrusion