Reassembly - Hitachi H 65SD2 Technical Data And Service Manual

9-2. Reassembly

Reassembly can be accomplished by following the disassembly procedures in reverse. However, special
attention should be given to the following items.
(1) Reassembly of the Crank Shaft [44] section
Press-fit the Ball Bearing 6205DDCMPS2L [41] into the Inner Cover [39], and fasten the Bearing Cover [42]
onto the Inner Cover [39] with the four Seal Lock Hex. Socket Hd. Bolts M5 x 16 [43]. Support the inner race
of the Ball Bearing 6205DDCMPS2L [41] with an appropriate jig, and press-fit the Crank Shaft [44] into the
ball bearing. Next, insert Distance Ring (B) [38] and two Woodruff Keys 4 x 16 [68] into the Crank Shaft [44],
and press-fit the Final Gear [37] and the Ball Bearing 6302VVCMPS2L [36] with a hand press.
(2) Reassembly of the Armature Ass'y [72]
Press-fit the Ball Bearing 6203DDCMPS2L [65] into the Inner Cover [39], and fasten Bearing Cover (A) [64]
onto the inner cover with the three Seal Lock Hex. Socket Hd. Bolts M5 x 16 [43].
(3) Reassembly of the Striker [21] (Two possible methods)
A. After the Connecting Rod Ass'y [28] has been
assembled into the Housing Ass'y [46], mount the
Piston [27] and press it into the Striker [21].
Connecting Rod Ass'y [28]
Piston [27]
Respiratory holes
Either of the two methods described above requires a pressing force of more than 30 kg. When a "hissing"
sound is heard, the piston is properly inserted in the striker. (The "hissing" is the sound of the compressed air
escaping from the striker when the piston reaches the respiratory chambers within the striker.)
Push
Striker [21]
B. Mount the Piston [27] onto the Connecting
Rod Ass'y [28], and push down on the
Connecting Rod Ass'y [28] to press the Piston
[27] into the Striker [21].
Housing Ass'y [46]
Piston [27]
Respiratory holes
Fig. 17
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Push
Connecting Rod Ass'y [28]
Striker [21]