Hitachi NT 65MA2, Технические данные и руководство по обслуживанию

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The Hex. Socket Hd. bolt M5 x 20 [4]
is loose.
Gasket [6] is damaged.
The seal surface of the Body Ass'y
[29] or the Exhaust Cover [5] is
abnormal.
9-3. Possible Causes and Correction of Air Leakage
Air leakage repair location
(A) Exhaust port Head Valve (A) [10] is abnormal ( a
portion is worn, deformed or broken).
The Exhaust Cover [5] is abnormal
( a portion is deformed or clogged
with dust).
Air leakage point
Possible cause
With control valve OFF With control valve ON
(B) Exhaust cover
(A)
(B)
(C)
d
b
a
(G)
Repair procedure
(1) Check the points of the
following parts marked
by an asterisk for
abnormal condition.
(2) Next, check the seal
parts (marked with a
double circle) for wear,
flaws and damage.
(3) And then, check other
places.
(F)
(E)
(D)
Head Valve (A) [10] and Cylinder [11]
are abnormal (seal surface of the b
portion is worn or deformed).
The O-ring (P-22) [9] is abnormal
(worn, deformed or damaged).
Head Valve (A) [10] is abnormal
(worn, deformed or damaged).
c
e
f
g