Hitachi DH 38MS Technical Data And Service Manual page 15

Fig. 2
Damper Washer [16]
Retainer Sleeve [12]
Cylinder Case [7]
Retainer Damper [10]
Striker [27]
Cylinder [19]
(b) Piston [30]
To remove the Piston [30], use a retaining ring puller to remove the Retaining Ring for the D10 Shaft [72],
and then remove the Connecting Rod [31] from the Crank Shaft [73].
(c) First Gear [78] and Crank Shaft [73]
Remove the Seal Lock Hex. Socket Hd. Bolt M6 x 45 [65], Seal Lock Hex. Socket Hd. Bolt M6 x 20 [64],
Hex. Socket Hd. Bolt (W/Flange) M5 x 16 [67] and Tapping Screw (W/Flange) D5 x 30 (black) [95].
Remove the Crank Case [70] from the Housing Ass'y [48] and Handle [97]. Remove grease from the
Piston [30] side and First Gear [78] side of the Crank Case [70]. Use a retaining ring puller to remove the
Rataining Ring for D40 Shaft [74] fixing the Ball Bearing 6203DDCMPS2L [75]. At this time, turn the Crank
Shaft [73] to expose the hole of the Retaining Ring for the D40 Shaft [74] prior to removal. Use a hand
press to press the end face of the Crank Shaft [73], and then remove the First Gear [78] and Crank Shaft
[73] from the Crank Case [70] (Fig. 3).
Fig. 3
Crank Case [70]
Retaining Ring for D40 Hole [74]
Damper [17]
Retainer Damper Washer [11]
Lock Spring [21]
Piston [30]
Crank Case [70]
Crank Shaft [73]
Crank Shaft [73]
-12-
Damper Holder [18]
Second Hammer [15]
Spring Holder (B) [20]
Retaining Ring for D10 Shaft [72]
Lock Sleeve [22]
Clutch Spring [23]
Clutch [24]
Connecting Rod [31]
Support
Crank Shaft [73]
First Gear [78]