Hitachi DH 24PD3 Technical Data And Service Manual page 30

(4) Mounting the Cylinder [18]
Mount the Second Hammer [28], O-ring (1AP-20) [29], Damper Holder [30], O-ring (B) [31], Damper (A) [32],
new O-ring (C) [33] and Hammer Holder [34] in the Cylinder [18]. Push the new Stopper Ring [35] into the
Cylinder [18] then push in the hole side of stopper ring jig (A) (J-341) on it as shown in Fig. 21. Push the
upper end surface of stopper ring jig (A) (J-341) with a hand press to fit the Stopper Ring [35] in the groove of
the inside diameter portion of the Cylinder [18]. Check that the Stopper Ring [35] is securely fitted in the
groove of the inside diameter portion of the Cylinder [18] viewing from the 5-mm diameter hole (2 pcs.) on the
Cylinder [18].
Damper Holder [30]
Second Hammer [28]
O-ring (B) [31]
(5) Mounting the Change Lever [25]
Push the Pushing Button [22] deeply in the hole of the Change Lever [25]. Position the Change Lever [25] on
the Gear Cover [10] as shown in Fig. 22 and push it in firmly. Adjust the Change Lever [25] to the position
"Rotation + Hammering" (
O-ring (1AP-20) [29]
Damper (A) [32]
mark) or "Rotation Only" (
Change Lever [25]
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5-mm diameter hole (2 pcs.)
Hammer Holder [34]
O-ring (C) [33]
Stopper Ring [35]
Stopper ring jig (A) (J-341)
Fig. 21
mark).
Pushing Button [22]
Fig. 22
Hand press