Hitachi DH 24DVA, Технические данные и руководство по обслуживанию

Страница: 32 / 46

--- 29 ---
(1) Disassembly of the hammering mechanism section
Push in the Second Hammer [29] with a drill bit or a screwdriver. Remove the Striker [37] chucked by O-ring
(C) [34] . Remove the Tapping Screw (W/Flange) D5 x 25 (Black) [9] from Gear Cover (A) [10] and remove
Gear Cover (A) [10] .
Remove from the end of Second Shaft (A) [49] , and turn Second Shaft (A) [49] so that the Piston [39] moves
to its maximum upper position (inner cover side). The arm of the Reciprocating Bearing [51] can then be
disconnected from the Piston Pin [50] , and Second Shaft (A) [49] and the components mounted on it can be
removed from the Inner Cover Ass'y [42] as a unit.
With a bearing puller, remove the First Gear [53] from Second Shaft (A) [49] . Then take off the Reciprocating
Bearing [51] . At this time, carefully note that the First Gear [53] must be aligned with and press-fitted onto the
9 mm diameter end of Second Shaft (A) [49] .
(2) Removal of Change Lever (A) [19]
As shown in Fig. 16-1, remove the Tapping Screw D2.6 x 10 [22] and turn Change Lever (A) [19]
counterclockwise (in the arrow direction) until " " mark on Change Lever (A) [19] points right below. Then
Change Lever (A) [19] can be removed. Be careful not to lose the Steel Ball D3.97 [23] . After removal of
Change Lever (A) [19] , the Second Pinion [43] , Clutch Spring [44] , Clutch [45] and Lock Plate [48] can be
removed as a unit as shown in Fig. 16-2.
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
Change Lever (A) [19]
Second Pinion [43]
Tapping Screw
D2.6 x 10
[22]
Fig. 16 - 1 Fig. 16 - 2
Clutch Spring [44]
Clutch [45]
Lock Plate [48]