Hitachi H 45MRY Technical Data And Service Manual page 22

Removal of the first gear and the crank shaft
Degrease the Connecting Rod [36] side and the First Gear [60] side of the Cylinder Crank Case [47]. Place
the Cylinder Crank Case [47] on a workbench facing the Connecting Rod [36] side downward. Apply light
pressure on the end surface of the Crank Shaft [42] with a hand press and pull out the Retaining Ring for D40
Hole [43] that fixes the Ball Bearing 6203DDCMPS2L [45] from the groove of the Cylinder Crank Case [47].
Before removal, move the crank pin of the Crank Shaft [42] as shown in Fig. 16 so that the hole of the
Retaining Ring for D40 Hole [43] can be seen.
Place the Cylinder Crank Case [47] on a workbench facing the Connecting Rod [36] side downward. Apply
light pressure on the end surface of the Crank Shaft [42] with a hand press to remove the First Gear [60] and
the Crank Shaft [42] (Fig. 17). Before removal, be sure to check that the Retaining Ring for D40 Hole [43] is
removed from the groove of the Cylinder Crank Case [47].
Cylinder crank case
Crank Shaft
Hole of the Retaining
Ring for D40 Hole [43]
Fig. 16
Crank shaft
Fig. 17
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Cylinder crank case
Apply pressure on the
end surface of the crank
shaft with a hand press.
First gear
Retaining ring for D40 hole
Workbench