Hitachi DH 40MR, Техническое и сервисное руководство

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9. REPAIR GUIDE
The numbers in [Bold] correspond to the item numbers in the Parts List and exploded assembly diagrams.
9-1. Disassembly
Front Cap [1]
Grip [2]
Fig. 14
(1) Disassembly of the tool holder
Pull the Grip [2] in the arrow direction to the full as
shown in Fig. 14. Remove the Front Cap [1]. (Front
Cap [1] is made of rubber and fitted securely. Pull
the Front Cap [1] forcefully to remove.) Thus the
Grip [2] can be removed from the Retainer Sleeve
[17].
Fig. 15
Remove the Stopper Ring [3] using a retaining ring puller. Then the Needle Holder [4], two Needle Rollers
D8 x 20 [16], Retainer Spring [5] and Spring Holder (A) [6] can be removed from the Retainer Sleeve [17]
(Fig. 15).
(2) Disassembly of the piston and the striker
Remove the Seal Lock Hex. Socket Hd. Bolt M4 x 12 [37] from the Crank Cover [39] then remove the Crank
Cover [39] from the Cylinder Crank Case [49]. Remove the Seal Lock Hex. Socket Hd. Bolt M6 x 45 [36] and
Seal Lock Hex. Socket Hd. Bolt M6 x 22 [89]. Remove the Gear Cover [66] from the Cylinder Crank Case
[49]. Remove the Bevel Pinion [50] (slip clutch) from the Cylinder Crank Case [49] (otherwise, Bevel Gear
[35] cannot be removed later). Remove the Seal Lock Hex. Socket Hd. Bolt M4 x 12 [37] from the Change
Lever [72] then remove the Change Lever [72]. Remove the Retaining Ring for D20 Hole [74] using a
retaining ring puller and remove the Lever Shaft [75] (otherwise, Bevel Gear [35] cannot be removed later).
Remove the Seal Lock Hex. Socket Hd. Bolt M6 x 25 [7] from the Front Cover [8]. Then the Retainer Sleeve
[17], Front Cover [8], Lock Sleeve [26], Lock Spring [25], Second Hammer [19], Clutch [31], Clutch Spring
[28], Cylinder [24], etc. can be removed from the Cylinder Crank Case [49] in an assembly state. Remove the
Bevel Gear [35] from the Cylinder Crank Case [49] by tapping the Front Cover [8] side with a plastic hammer.
Remove the Striker [29] from the Cylinder [24] by tapping with a plastic hammer. The Piston [32] remains in
the Cylinder Crank Case [49]. Remove the Retaining Ring for D10 Shaft [42] using a retaining ring puller and
remove the Connecting Rod [34] from the Crank Shaft [43] (Fig. 16).
Stopper Ring [3] Needle Holder [4]
Needle Roller [16]
Retainer Spring [5]
Spring Holder (A) [6]