Hitachi HAMMER H 65SC Technical Data And Service Manual page 18

Oil Felt [79]
Oil Tank Chamber
(5) How to install Seal Ring (A) [44]:
To prevent oil from leaking through between the Housing Ass'y [59] and the Inner Cover [45], Seal Ring (A)
[44] is installed in the Inner Cover [45] for sealing oil. When fitting Seal Ring (A) [44] in the ring groove on the
Inner Cover [45], exercise care not to allow the Seal Ring to twist or project out of the groove.
(6) How to install the L-Ring [9]:
When installing the L-Ring [9] on the Piston [11],
pay attention to the L-Ring direction. The longer
flange side should be directed to the front, as shown
in the figure. (Fig. 16)
(7) Cover Plate [72]:
Any gap between the Cover Plate [72] and the Housing Ass'y [59] may result in oil leakage or failure of
automatic lubrication. Do not disassemble the Cover Plate [72] except when absolutely necessary. When it is
inevitably necessary to disassemble and reassemble the Cover Plate (as when replacing the Oil Felt [79]), for
thorough sealing, apply liquid packing (Fuji Oil Sheet No. 600K) to the mounting surface on the Housing Ass'y
[59].
Recess Protrusion
Felt Holder (C) Ass'y [77]
Fig. 14
M8 x 16 Hex.
Bolt [35]
Front Cover
Housing
Ass'y
--- 15 ---
Connecting Rod Ass'y [38]
Oil Felt [79] Oil Tank Chamber
Fig. 15
Fig. 16