Hitachi DH 40SR Service Manual And Technical Data page 24

Piston Pin [40]
O-ring [37]
Piston [39]
(3) Reassembly of the cylinder and the hammer sleeve
Press-fit the Hammer Sleeve [21] into the Ball Bearing 6007DDUAV2S [17] and secure it with the Retaining
Ring for D35 Shaft [16]. Mount the Damper Washer [24], Damper [25], Damper Holder [26] and Damper
Holder (B) [27] to the Hammer Sleeve [21]. Mount the Damper Washer [24] aligning the radius of the inside
diameter with the radius of the Second Hammer [23]. Mount the Damper Holder [26] so that its flat surface
faces the Damper [25] side. Mount Damper Holder (B) [27] so that its flat surface faces the Damper Holder
[26] side. Insert the Cylinder [31] into the Hammer Sleeve [21]. Secure the Cylinder [31] and the Hammer
Sleeve [21] with the four Needle Pins D6 x 6 [30]. Insert the assembly of the Slide Ring [29] and Damper (C)
[28] into the slot of the Hammer Sleeve [21] and the Cylinder [31]. Tilt the assembly of the Slide Ring [29]
and Damper (C) [28] slightly with respect to the shaft of the Cylinder [31] and turn it 90˚ on the protrusion of
the Slide Ring [29]. At this time, apply special grease (for hammer and hammer drill) to the Slide Ring [29]
and Damper (C) [28] before assembling (Fig, 18).
Insert the Striker [36] into the Cylinder [31]. Mount the Bearing Washer [18], Urethane Ring [19], Ring Holder
[20], Slide Sleeve (B) [32], Slide Sleeve (A) [33], Spring (A) [34], Sleeve (A) [35], Clutch [38] and Bevel Gear
[42] to the Cylinder [31]. Move the crank pin of the Crank Shaft [50] then move the Piston [39] to the top
dead center. Insert the hammer sleeve assembly into the Cylinder Crank Case [56]. If the Slip Clutch Ass'y
[71] is mounted in the Cylinder Crank Case [56], it will be an obstacle for mounting the Bevel Gear [42].
Before mounting the Slip Clutch Ass'y [71], mount the hammer sleeve assembly to the Cylinder Crank Case
[56]. When press-fitting Oil Seal (B) [14], cover the Hammer Sleeve [21] with the Driver [13] to protect the
inside lip portion (Fig. 19).
Cylinder Crank Case [56]
Mark
Connecting Rod [41]
Retaining Ring for
D10 Shaft [49]
Fig. 17
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Crank Pin
Crank Shaft [50]