Hitachi NR 65AK Service Manual page 28

Stopper of the
Cylinder Plate [12]
Rib of the Body Ass'y [18]
O-Ring (P-22) [9]
Groove of the
Exhaust Cover [5]
Head Valve (A) [10]
B
Fig. 19
Fig. 20
Top Cover [3]
Exhaust Cover [5]
Fig. 21
Mount the Cylinder Plate [12] to the
Cylinder [15] facing the stopper of the
Cylinder Plate [12] to the Piston Bumper
[19]. When mounting to the Body Ass'y
[18], fit the rib of the Body Ass'y [18] into
the stopper groove of the Cylinder Plate
[12] (Figs. 19 and 20).
Apply grease to the sliding surface
the Exhaust Cover [5] and Head Valve (A)
[10] and charge about 0.5 g (0.018 oz) of
grease in the groove of the Exhaust Cover
[5] (Fig. 21).
Apply grease to the lip portions
of Head Valve (A) [10] (Fig. 21).
Apply grease to the O-Ring (P-22) [9].
Mount the O-Ring (P-22) [9] to Head
C
Valve (A) [10], then mount it to the
Exhaust Cover [5].
A
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of
A
and C
B