Hitachi DH 24PE (S) Technical Data And Service Manual page 26

(2) Disassembly of the change lever
As shown in Fig. 15, pressing the Pushing Button [110] hard, turn the Change Lever [107] 45˚
counterclockwise from the "striking only" position (
(3) Disassembly of the chuck section
As shown in Fig. 16, slide the Grip [101] in the direction
indicated by the arrow, and remove the Front Cap [1].
The Grip [101], the Ball Holder [102] inside the Grip,
the Holder Spring [4], Washer (B) [5] and the Steel Ball
D7.0 [18] can then be removed from the Cylinder [111].
(4)Disassembly of the cylinder, second gear (slip mechanism section) and related parts
Take the Inner Cover [33] off of the Gear Cover [104], and remove the entire chuck section. Extract the
Retaining Ring for D20 Shaft [6]. (For easy removal of this retaining ring, use of special repair tool J-200
snap ring pliers [Code No. 970976] is recommended.) Then, turn the Gear Cover [104], upright and use a
hand press to extract the Cylinder [111] from the Gear Cover [104]. The Sleeve [15] can then be extracted
from the Cylinder [111]. At this time, be very careful not to lose the three Steel Balls D5.556 [19]. Remove
the Retaining Ring D30 [115] from the upper part of the Cylinder [111]. The Second Gear [112], Spring (A)
[113] and Washer (A) [114] can then be removed from the Cylinder [111]. Next, extract the O-Ring (I.D. 10.5)
[27A] from the inner part of the Cylinder [111], and the Second Hammer [116] can be extracted from the
Cylinder [111]. (For easy extraction of this O-Ring (I.D. 10.5) [27A], fit a special repair tool J-201 spring hook
[Code No. 970977] onto the outer circumference of the O-Ring (I.D. 10.5) [27A], and pull it out.) As the
O-Ring (I.D. 10.5) [27A] is employed to prevent idle striking, please advise customers to replace it with a new
one whenever it is disassembled.
mark). Pry out the Change Lever [107] at this position.
Change Lever [107]
Pushing Button [110]
Fig. 15
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Front Cap [1]
Grip [101]
Fig. 16