Sealed And Dustproof Construction - Hitachi H 30PV Technical Data And Service Manual

Front cap
O-ring
Retainer
sleeve
O-ring
Front cover

8-3. Sealed and Dustproof Construction

The crank case and cylinder case are sealed by five O-rings, and an oil seal which serve to prevent leakage of the
grease, as well as to prevent dust and dirt from entering the mechanism.
Second hammer
Forward movement of
second hammer & striker
O-ring
O-ring
Cylinder case
Housing
Sleeve
Fig. 3
O-ring
Crank case
Fig. 4
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Air
chamber
Air hole
Switch handle
Oil
seal