Hitachi DH24PB3, Technical Data And Service Manual

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Damper (A) [31]
Stopper Ring [34]
Damper Holder [33]
5-mm diameter hole (2 pcs.)
O-ring (C) [32]
O-ring (B) [30]
O-ring (1AP-20) [28]
Second Hammer [27]
Hammer Holder [29]
Tap with a hammer.
Punch (C) (J-341)
Fig. 12
(4) Disassembly of the cylinder and the second hammer
Remove the Stopper Ring [34] from the inside diameter portion of the Cylinder [22] . Then the Second
Hammer [27] , O-ring (1AP-20) [28] , Hammer Holder [29] , O-ring (B) [30] , Damper (A) [31] , O-ring (C) [32]
and Damper Holder [33] can be removed from the Cylinder [22] . As shown in Fig. 12, insert stopper ring jig
(A) (J-341) into the no-hole side of the Cylinder [22] until it contacts the end surface of the Damper Holder
[33] . Hold the Cylinder [22] and the end surface of stopper ring jig (A) (J-341) with a vise, and compress
Damper (A) [31] (it moves a little when the Stopper Ring [34] is pressed with punch (C) (J-341)). Insert punch
(C) (J-341) into the 5-mm diameter hole (2 places) in the Cylinder [22] and tap the outside of the Stopper Ring
[34] until the Stopper Ring [34] cannot be seen from the 5-mm diameter hole (2 places) to remove the Stopper
Ring [34] from the groove of the inside diameter portion of the Cylinder [22] . Then remove the Cylinder [22]
from the vise and pull out the Stopper Ring [34] from the inside diameter portion of the Cylinder [22] with ring
puller jig (B) (J-341) being careful not to pop out the Stopper Ring [34] . At reassembly, replace the Stopper
Ring [34] with new one as the removed Stopper Ring [34] is deformed. To prevent idle hammering, also
replace O-ring (C) [32] with new one at reassembly.
Stopper ring jig (A) (J-341)
Vise
Vise