Hitachi DH 30PC2 Technical Data And Service Manual page 26

Slide Ring [30]
Slide Sleeve (B) [33]
(4) Removal of the Piston [44]
The Piston [44] is remainded in the Crank Case [94]. Move the Crank Shaft [92] to the bottom dead center
then the piston ass'y can be removed from the Crank Shaft [92]. (Figs. 18 and 19)
Crank Case [94]
Piston [44]
(5) Removal of the First Gear [98] and the Crank Shaft [92]
Remove the Hex. Socket Hd. Bolt (W/Flange) M5 x 16 [102] and the Tapping Screw (W/Flange) D5 x 20
(Black) [103] from Handle (A). (B) Set [101] and separate Handle (A). (B) Set [101] from the Crank Case [94]
and the Housing Ass'y [106]. Remove the Seal Lock Hex. Socket Hd. Bolt M6 x 45 [54] from the Crank Case
[94] and separate the Crank Case [94] from the Housing Ass'y [106]. Place the Crank Case [94] on a support
facing the Connecting Rod [45] downward and press the end face of the Crank Shaft [92] with a hand press to
remove the Crank Shaft [92] and the First Gear [98]. (Fig. 20)
Slide Sleeve (A) [34]
Connecting Rod [45]
Crank Shaft [92]
Fig. 18
Cylinder [36]
Fig. 17
Crank Case [94]
--- 23 ---
Connecting
Rod [45]
Crank Shaft [92]
Fig. 19