Hitachi DH 22PB, Технические данные и руководство по обслуживанию, Страница: 23 / 38

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9. PRECAUTIONS IN DISASSEMBLY AND REASSEMBLY
The numbers in [Bold] correspond to the item numbers in the Parts List and exploded assembly diagrams.
9-1. Disassembly
(1) Disassembly of the striking mechanism section
Push in the Second Hammer [27] with a drill bit or a screwdriver. Remove the Striker [35] chucked by O-ring
(C) [32]. Push the Pushing Button [12] fully when the Change Lever [14] is positioned "Rotation Only" (
mark) as shown in Fig. 8. Then turn the Change Lever [14] by 135˚ clockwise. Ply out the Change Lever [14]
at this position. Remove the Tapping Screw (W/Flange) D5 x 35 [9] from the Gear Cover [10] and remove the
Gear Cover [10].
The Inner Cover [39] and the Housing [62] are loosely fitted together. Attempting to pull them out first could
cause the Armature [57] to be pulled out at the same time, causing damage to the Carbon Brushes [66].
Remove the Spacer [42] and Spring (B) [43] from the end of the Second Shaft [44], and turn the Second Shaft
[44] so that the Piston [37] moves to its maximum upper position (inner cover side). The arm of the
Reciprocating Bearing [48] can then be disconnected from the Piston Pin [40], and the Second Shaft [44] and
the components mounted on it can be removed from the Inner Cover [39] as a unit.
With a bearing puller, remove the First Gear [49] from the Second Shaft [44]. Then take off the Reciprocating
Bearing [48]. At this time, carefully note that the First Gear [49] must be aligned with and press-fitted onto the
9 mm diameter end of the Second Shaft [44].
The Clutch [47], Clutch Spring [46] and Washer (B) [45] can then be removed from the Second Shaft [44].
Fig. 8
Change Lever [14]
Pushing Button [12]