Hitachi NR 83A2 Technical Data And Service Manual page 30

Air leak part
When trigger valve/safety valve are OFF
F
Safety valve
(continued.)
Loose Hex. Socket Hd. Bolt M5x18 [41].
G
Broken Gasket (D) [39]
Cap
Defective seal surface of the Body Ass'y [25]
or Cap [40]
Cause
When trigger valve/
safety valve are ON
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When trigger valve ON/
safety valve OFF
Scratched or damaged
O-ring [60] inside Valve
Sleeve (A) [69] (When
single actuation is
selected)