Hitachi DH 50MRY Technical Data And Service Manual page 16

Fig. 3
Retainer Sleeve [19]
Second Hammer [21]
Damper Washer [22]
Damper [23]
Needle Pin D8 x 6 [25]
Cylinder Case [37]
(d) First Gear [116] and Crank Shaft [79]
Remove the Seal Lock Hex. Socket Hd. Bolt M6 x 45 [114], Seal Lock Hex. Socket Hd. Bolt M6 x 22
[122], Seal Lock Hex. Socket Hd. Bolt M5 x 30 [90], Seal Lock Hex. Socket Hd. Bolt M5 x 16 [67], Hex.
Socket Hd. Bolt (W/Flange) M5 x 14 [54] and Tapping Screw (W/Flange) D5 x 30 (Black) [63] and
remove the Crank Case [115] from the Housing Ass'y [136], Back Cover [53] and Handle (A). (B) Set
[56]. (Note that the Gear Cover [113] and the Crank Case [115] cannot be removed without removing the
Seal Lock Hex. Socket Hd. Bolt M5 x 30 [90] and separating the weight ass'y from the Crank Case
[115].)
Remove grease from the Piston [35] side and the First Gear [116] side of the Crank Case [115].
Remove the Retaining Ring for D47 Hole [81] fixing the Ball Bearing 6204DDCMPS2L [82] with a
retaining ring puller. At this time, turn the Crank Shaft [79] so that the hole of the Retaining Ring for
D47 Hole [81] can be seen before removal (Fig. 4). Press the end face of the Crank Shaft [79] with
a hand press to remove the First Gear [116], Second Pinion [117] and Crank Shaft [79] from the
Crank Case [115] (Fig. 5).
Fig. 4
Crank Case [115]
Retaining Ring For D47 Hole [81]
(e) Slip Cluch
Refer to the Technical Data and Service Manual for the Model DH 50MB (List No. E455) because the slip
clutch mechanism is the same as that of the Model DH 50MB.
Lock Spring [27]
Damper Holder [24]
Striker [31]
Spring Holder (B) [29]
Piston [35]
Connecting Rod [36]
Crank Shaft [79]
Cylinder [26]
Weight [88]
Clutch Spring [30]
Leaf Spring [93]
Retaining Ring for D12 Shaft [78]
Fig. 5
First Gear [116]
Crank Shaft [79]
Support
-13-
Weight ass'y
Crank Shaft [79]
Second Pinion [117]
Crank Case [115]