Repair Guide; Precautions And Suggestions For Disassembly And Reassembly Of The Main Body - Hitachi H 45MR 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. 12 and 13.)
Pull Grip (A) [2] fully in the arrow direction as shown in
Fig. 12 and remove the Front Cap [1] (since the Front
Cap [1] is made of rubber and engaged firmly with the
Retainer Sleeve [16], pull it strongly to remove). This
allows Grip (A) [2] to be separated from the Retainer
Sleeve [16].
Needle holder
Retainer sleeve
Remove the Ring [3] by means of a snap ring remover, then the Needle Holder [4], the two Needle Rollers
D8 x 20 [5] and Spring (A) [6] can be removed from the Retainer Sleeve [16]. Remove the Retaining Ring
D42 [7] by means of a snap ring remover, then the Ball Holder [8], Grip (B) [9] and the four Steel Balls D6.35
[11] can be removed from the Front Cover [13]. Furthermore, remove the Retaining Ring D42 [7] by means
of a snap ring remover, then Grip (C) [10] can be removed from the Front Cover [13]. (Fig. 13)
Piston and striker disassembly
Remove the Seal Lock Hex. Socket Hd. Bolts M6 x 25 [12] fixing the Front Cover [13], then the Retainer
Sleeve [16] and the Front Cover [13], Hammer Holder (A) [18], Damper (A) [17], Second Hammer [20],
Hammer Holder (B) [22], Damper (B) [23], Washer [24], Hammer Holder (C) [25], Damper (C) [21], Cylinder
Holder [28], Cylinder [31], Sleeve (A) [29] and Spring (C) [30] can be removed from the Cylinder Crank Case
[48]. The Striker [26] can be removed by tapping the Cylinder [31] lightly with a plastic hammer. As the
Piston [33] remains in the Cylinder Crank Case [48] side, remove the Seal Lock Hex. Socket Hd. Bolts
M4 x 12 [36] fixing the Crank Cover [38], then the Crank Cover [38] can be removed from the Cylinder Crank
Case [48], and remove the Retaining Ring for D10 Shaft [41] to remove the Connecting Rod [34] from the
Crank Shaft [42].
Needle roller D8 x 20
(2 pcs.)
Ring
Spring (A)
Front cap
Ball holder
Grip (B)
Retainer ring
Steel ball
(4 pcs.)
Fig. 13
--- 13 ---
Grip (A)
Fig. 12
Grip (C)
Front cover