Hitachi H 25PV Technical Data And Service Manual page 19

Inside cylinder reassembly
Mount O-ring (C) [27] to the Second Hammer [26], then insert the second hammer ass'y, Damper Washer
[28], Damper [29] and Damper Holder [30] into the Cylinder [24]. Make sure of the direction of the Damper
Washer [28] and the Damper Holder [30] (Fig. 23). Insert the Stopper Ring [31] into the Cylinder [24], then
the Stopper Ring [31] is pushed to the groove inside the Cylinder [24] with a suitable pipe (Fig. 24). Make
sure the Stopper Ring [31] is in the groove inside the Cylinder [24] by watching the hole provided on the
Cylinder [24]. Insert the Slide Ring [32] into the Cylinder [24]. Mount the O-ring [34] to the Striker [33], then
insert the striker ass'y into the Cylinder [24].
Pipe
Cylinder
Stopper ring
Second hammer
O-ring (C)
Fig. 24
Hole
Stopper ring
Damper
Damper
Damper holder
Fig. 23
Cylinder, cylinder case reassembly
Slide Sleeve (A) [21], Slide Sleeve (B) [20], Needle Cover [19] and Needle Holder [17] are inserted in the
outer circumference of the Cylinder [24]. Insert the four Needle Rollers [18] into holes of the Needle Holder
[17] and the Slide Ring [32]. Make sure of the direction of Slide Sleeve (B) [20] (Fig. 26). Mount O-ring (A)
[16] to the Cylinder Holder [15]. The cylinder holder ass'y is inserted in the outer circumference of the
Cylinder [24], then the Retaining Ring for D28 Shaft [13] is attached in the Cylinder [24] by means of a snap
ring remover. The Washer [14] is inserted in the outer circumference of the Cylinder Holder [15] then insert
the Cylinder [24] into the Cylinder Case [9] (Fig. 25). Spring (A) [22] and the Thrust Washer [25] are inserted
in the outer circumference of the Cylinder [24], then the Cylinder Case [9] is combined with the Crank Case
[46]. It will become easy if the Crank Shaft [40] is moved to the bottom dead center at this time (Fig. 27).
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