Repair Guide; Precautions And Suggestions For Disassembly And Reassembly Of The Main Body - Hitachi H 45SR Technical Data And Service Manual

9. REPAIR GUIDE

9-1. Precautions and Suggestions for Disassembly and Reassembly of the Main Body

The numbers in [Bold] correspond to the item numbers in the Parts List and exploded assembly diagrams.
9-1-1. Disassembly
Retainer disassembly (See Figs. 11 and 12.)
Pull Grip (A) [4] fully in the arrow direction as shown in
Fig. 11 and remove the Front Cap [1] (since the Front
Cap [1] is made of rubber and engaged firmly with
Sleeve (C) [3], pull it strongly to remove).
Sleeve (C)
Retaining ring
Remove the Retaining Ring D28 [2] by means of a snap ring remover, then Sleeve (C) [3], Grip (A) [4], Ball
Holder [5], the six Steel Balls D7.94 [7] and Spring (A) [6] can be removed from the Front Cover Ass'y [10].
Furthermore, remove the Retaining Ring D35 [8] by means of a snap ring remover, then Grip (B) [9] can be
removed from the Front Cover Ass'y [10]. (Fig. 12)
Piston and striker disassembly
Remove the Seal Lock Hex. Socket Hd. Bolts M6 x 25 [11] fixing the Front Cover Ass'y [10], then the Front
Cover Ass'y [10], Hammer Holder (A) [16], Damper (A) [15], Second Hammer [18], Hammer Holder (B) [20],
Damper (B) [21], Washer [22], Hammer Holder (C) [23], Damper (C) [19], Cylinder Holder [26], Cylinder [29],
Sleeve (A) [27] and Spring (C) [28] can be removed from the Cylinder Crank Case [46]. The Striker [24] can
be removed by tapping the Cylinder [29] lightly with a plastic hammer.
As the Piston [31] remains in the Cylinder Crank Case [46] side, remove the Seal Lock Hex. Socket Hd. Bolts
M4 x 12 [34] fixing the Crank Cover [36], then the Crank Cover [36] can be removed from the Cylinder Crank
Case [46], and remove the Retaining Ring for D10 Shaft [39] to remove the Connecting Rod [32] from the
Crank Shaft [40].
Ball holder
Grip (A)
Steel ball (6 pcs.)
Spring (A) Retaining ring
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Front cap
Front cover
Fig. 12
Grip (A)
Fig. 11
Grip (B)