Hitachi DH 40MEY Service Manual page 16

Fig. 20
Slider [33]
Fig. 22
(1) Apply specified grease to the Cylinder [25] (inner and outer diameter portions), Striker [26], and O-ring [27].
(2) Insert the Striker [26] into the Cylinder [25] in the arrow direction until it contacts the innermost end.
(3) Apply a small amount of specified grease to the inner diameter portion of the Cylinder [25] once more to give
a thin film of grease.
Apply to inner and outer
polished surfaces.
Cylinder [25]
Fig. 23
Piston Pin [37]
O-ring [36]
Connecting Rod Ass'y [39]
Needle Bearing [40]
Crank Case [89]
Fill 60 g of
grease.
Piston [38]
-15-
Fig. 21
Crank Case [89]
Crank Case [89]
(Fill the space between the metals with
0.5 to 1.0 g of grease.)
Striker [26]
Apply to outer peripheral
sliding surfaces.
Fig. 24
Apply to outer peripheral
sliding surfaces.
O-ring (C) [20]
Metal
O-ring [27]
Second Hammer [21]