Hitachi H 45MRY Technical Data And Service Manual page 23

9-1-2. Reassembly
Reassembly can be accomplished by following the disassembly procedure in reverse. However, special attention
should be given to the following items.
Mounting hammer holder (A)
Set the Retainer Sleeve [16], O-ring (S-34) [14],
Damper (A) [17] and Hammer Holder (A) [18] in the
Front Cover [12]. Supporting the flange portion of the
Front Cover [12] with a proper jig, lightly push in Ring
(B) [20] using a proper jig of 44 mm outside dia. and
a hand press. At this time, check that Ring (B) [20] is
fitted in the groove of the Front Cover [12] securely
(Fig. 18).
Mounting the first gear and the crank shaft
Mount the O-ring (S-40) [44] to the Cylinder Crank Case [47]. Press-fit the Ball Bearing 6203DDCMPS2L [45]
and mount the Retaining Ring for D40 Hole [43] using a retaining ring puller. Press-fit the Crank Shaft [42] in
the Ball Bearing 6203DDCMPS2L [45] and mount the Oil Seal [46]. Put one Feather Key 4 x 4 x 10 [38] in the
groove of the Crank Shaft [42]. Supporting the flat portion of the Crank Shaft [42] with a proper steel bar,
press-fit the First Gear [60] with a proper jig. Before press-fitting, check that the key groove of the Feather Key
4 x 4 x 10 [38] is aligned with the key groove of the First Gear [60] (Fig. 19).
Cylinder crank case
Damper (A)
Suitable tool
Crank shaft
Fig. 19
--- 20 ---
Ring (B)
Front cover
Fig. 18
Feather key
First gear
Oil seal
Ball bearing
O-ring
Retaining ring for D40 hole
Steel bar
Proper jig
O-ring
Hammer holder (A)
Retainer sleeve