Hitachi WR12DMB - 12.0 V 1/2" Impact Wrench 2 Battery Service Manual page 38

(c) Mount a unit of the Inner Cover [24] <21> (including the Armature Ass'y [25] <22>), Magnet [26] <23>
(including the Dust Guard Fin [27] <24>) and Brush Block [28] <25> into housing (A) (See Fig. 15). Pay
attention to the following items.
Adjust the protrusion of the Dust Guard Fin [27] <24> to the notch of the Magnet [26] <23> when mounting
the Dust Guard Fin [27] <24> to the Magnet [26] <23> (See Fig. 14).
Insert the two Dampers [23] <18> so that they fit into the Inner Cover [24] <21>. Fit the locking rib of the
Ring Gear [20] <17> to the concave portion of the Damper [23] <20>. Press-fit the Armature Ass'y [25]
<22> into the Inner Cover [24] <21>.
Adjust the convex portion of the Dust Guard Fin [27] <22> to the concave portion of the Brush Block [28]
<25> (See Fig. 14).
Adjust the notch (for locking) of the Magnet [26] <23> to the protrusion of housing (A) (See Figs. 14 and
15).
Position the plate of the Dust Guard Fin [27] <24> under the rib of Housing (A) (See Fig. 16).
Concave
portion
Brush Block [28] <25>
Convex
portion
Projection
Align the projection of housing (A) to
the notch of the Magnet [26] <23>.
Fig. 15
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Dust Guard Fin
[27] <24>
Notch
Fig. 14
Housing (A)
Magnet [26] <23>