Hitachi NR 90AC3, Технические данные и руководство по обслуживанию

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The upper O-ring (I.D. 8.8) [58] of Valve
Piston (B) [57] is abnormal (worn, broken or
flawed).
The Head Valve O-ring (I.D. 16.8) [53] of
Valve Bushing (B) [54] is abnormal (broken
or flawed).
The upper surface f of the valve cavity of
the Body [22] is abnormal.
The O-ring (I.D. 11) [59] of Valve Piston (B)
[57] is abnormal (worn, broken or flawed).
The lower O-ring (I.D. 8.8) [58] of Valve
Piston (B) [57] is abnormal (worn, broken or
flawed).
The O-ring (S-18) [55] of Valve Bushing (B)
[54] is abnormal (broken or flawed).
The internal surface e of the valve cavity
of the Body [22] is abnormal.
C) Nose 1
The O-ring (S-95) [14] of the Cylinder Plate
[13] or the O-ring (I.D. 59.6/W2.4) [15] of
the Cylinder [17] is abnormal (broken or
flawed).
Air leakage point
Possible cause
With control valve OFF With control valve ON
The Cylinder O-ring [11] of the Body [22] or
the groove is abnormal (broken or flawed).
The Hex. Socket Hd. Bolt M8 x 30 [64] is
loose.
Piston Bumper (A) [24] is abnormal
(portion d is damaged, deformed or
cracked).
The Piston [19] is abnormal (driver blade is
deformed or seal surface is deformed).
The O-ring (I.D. 1.8) [62] of Plunger (A)
[61] is abnormal (worn, broken or flawed).
Valve Bushing (A) [63] is abnormal (sliding
surface of Plunger (A) [61] is deformed or
flawed).
The O-ring (S-4) [56] of Valve Piston (B)
[57] is abnormal (worn, broken or flowed).
Valve Piston (B) [57] is abnormal (sliding
surface of Plunger (A) [61] is deformed or
flawed).
D) Nose 2
E)
Control Valve 1
F)
Control Valve 2
Gasket (B) [41] is damaged.
The Hex. Socket Hd. Bolt M5 x 16 [44] is loose.
Seal surface of the Body [22] or the Cap [43] is abnormal (damaged, deformed or flawed).
G) Cap