Hitachi DH 28PC Technical Data And Service Manual page 22

Remove Felt Packing (A) [13] from the assembly parts and insert the tip of the bearing puller's hook into
the space between Ball Bearing 6905DDUCMNS7S [14] and Washer (A) [70]. In this state, stand Cylinder
[21] upright, then use a hand press to push the end face of Cylinder [21] and then demount Ball Bearing
6905DDUCMNS7S [14]. You can then separate Washer (A) [70], Lock Spring [16], Lock Sleeve [17],
Washer (B) [67], and Slide Sleeve [19]. Cylinder [21] and other parts may pop up under spring pressure
when you demount Ball Bearing 6905DDUCMNS7S [14]. Therefore, be very careful.
Lock Spring [16]
Lock Sleeve [17]
Cylinder [21]
Hand press
Ball Bearing 6905DDUCMNS7S [14]
Hook of bearing puller
Washer (A) [70]
Washer (B) [67]
Slide Sleeve [19]
-19-