Hitachi DH 40MEY Service Manual page 12

(c) Firmly fit each Weight Spring [92] to each Weight [91] groove and Crank Case [89] groove as
shown below when assembling the four Weight Springs [92] to the Weights [91]. Note that the
low-vibration effect is lost in case a weight spring comes off due to vibration during work.
Fig. 15
[91]
Two grooves on the Weight [91]
(Total of four grooves including
those on the other side)
(7) Change lever
When inserting the Lever Shaft [104] into the Crank Cover [101], set the eccentric pin of the Lever
Shaft [104] on the
mount the Change Lever [99] on the Lever Shaft [104] with the
aligned with the
Fig. 16
[99]
[101]
[104]
Four grooves on the
Crank Case [89]
[89]
(rotation and hammering mode) mark side of the Crank Cover [101]. Then
mark of the Crank Cover [101].
[92]
[101]
Eccentric pin
-11-
[92]
mark of the Change Lever [99]
[99]
mark
Rotation and hammering
mode mark