Hitachi NT 65GB, Technical Data And Service Manual, Page: 22 / 56

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<Continued>
Problem Possible cause Inspection method Corrective action
No combustion
occurs.
<Electric section>
Continued
• No spark occurs. (Check
for sparking according to
9-3, “Checking for
Sparking and Corrective
Action.")
• The Battery [58] is not
set properly.
• The Battery [58] is faulty.
• The battery indicator light
goes on in red.
• Connection failure
between Internal Wire (A)
[60A] and the Controller
[95].
• The spark plug cable is
disconnected from Spark
Plug (A)
[5] .
• Faulty insulation of the
spark plug cable wire
• Break in Internal Wire (A)
[60A].
• The spark switch is faulty.
• Spark Plug (A)
[5] is
stained.
• The wire near the Trigger
[71] is pinched.
• The Pushing Lever Arm
[77] is deformed.
• Set the Battery [58]
properly.
• Replace the Battery [58] .
• Charge the Battery [58] .
• Connect properly (Fig. 15).
• Connect properly (Fig. 16).
• Replace the Controller
[95] .
• Replace Internal Wire (A)
[60A] .
• Replace Internal Wire (A)
[60A] .
• Clean Spark Plug (A) [5]
(Fig. 17).
• Position the wire correctly
(Fig. 15).
• Replace the Pushing
Lever Arm [77] .
No nail is driven
though nails are
set properly and
combustion is
normal.
<Combustion section>
• The Piston [27] does not
return completely.
• Check the position of the
Piston [27] .
• Piston Ring (B) [17] is
worn.
• The Reed Valve [50] is
deformed.
• The cylinder is stained
inside.
• Piston Ring (A) [26] is
damaged.
• Return the Piston [27] to
the uppermost position
with a flat-blade
screwdriver.
• Hold down Pushing Lever
(A) [82] securely until
nailing operation is
completed.
• Replace Piston Ring (B)
[17] .
• Replace the Reed Valve
[50] .
• Clean inside the cylinder.
• Replace Piston Ring (A)
[26] .
Output is low. • Discharge and cooling
are insufficient.
• The outside air
temperature and altitude
exceed specifications.
• The Filter Mesh [2] is
clogged.
• Check the outside air
temperature and altitude.
• Clean the Filter Mesh [2]
(Fig. 12).
• Outside air temperature
range: 0°C to 40°C
• Altitude: Less than 1,500 m
(5,000 feet)
The nailer is
overheated.
• Discharge and cooling
are insufficient.
• The operating speed is
too fast.
• The Filter Mesh [2] is
clogged.
• Clean the Filter Mesh [2]
(Fig. 12).
• Do not use the nailer at
high speed.
Speed: 1 nail/sec.
Continuous operation:
1,000 nails/h
Abnormal noise
is heard during
fan rotation.
*
A rubbing noise may
be heard in some
rare cases, but there
is no problem in
operation.
• Discharge and cooling
are insufficient.
• Check that the Motor
Ass'y [25B] , Fan [11] and
Nut M3 [8] are mounted
properly.
• Mount each part properly.