Hitachi DH 24PM Technical And Service Manual page 29

Remove the parts around the grip and the Retaining Ring for D25 Shaft [8] as shown in Fig. 19. Then Washer
(B) [9], Spring [10], Lock Grip [11], Lock Ring [12], Steel Ball D7.0 [14], Washer (A) [15] and Retaining Ring
for D28 Shaft [16] can be removed in this order.
< Removal of the chuck holder >
Engage the chuck holder jig (J-345) with the spline as shown in Fig. 20. Hold the width across flats in a vise
and remove Flat Hd. Screw (A) (Left Hand) M6 x 25 [26]. Put a hexagonal bar in the Drill Chuck 13VLRH-N
(W/O Chuck Wrench) [27] then loosen and remove it using a torque wrench. Remove the Stopper [28]. Then
the chuck holder can be removed in the same manner as the bit holder.
Chuck holder jig (J-345)
Bit Holder [13]
Chuck Holder [29]
Stopper [28]
Lock Ring [12]
Lock Grip [11]
Fig. 19
Drill Chuck 13VLRH-N
(W/O Chuck Wrench) [27]
Fig. 20
--- 26 ---
Flat Hd. Screw (A)
(Left Hand) M6 x 25 [26]