Hitachi NT 65GB Technical Data And Service Manual page 19

Insert the stem of the fuel cell into the hole on the adapter.
Adapter [20]
Fig. 13
<Checking the fuel cell>
Problem
Fuel is not • Fuel is leaking.
sprayed. • There is no fuel.
Fuel is • The bag in the fuel cell is
sprayed but damaged.
no
combustion
occurs.
• Insufficient sealing of the cup
and stem in the metering
valve.
• The nailer is left under a high
temperature condition.
The nailer is left in direct
sunlight or nails are driven
continuously. <Excessively
high concentration of gas>
• The nailer is left under a low
temperature condition.
0°C or lower temperature
<Low concentration of gas>
Fuel is sprayed • The oxygen content of air is low
but no at such places as highlands at
combustion an altitude of 1,500 meters or
occurs. more.
<Excessively high concentration
of gas>
Stem
Fuel cell
Possible cause
To attach the metering valve to a fuel cell:
Inspection method
• The metering valve
is not set properly.
• Press the stem five
or more times with
the fuel cell held
upright to check
whether fuel is
being sprayed.
• Fuel is not sprayed
when the fuel cell
is held upright, but
is sprayed when
the fuel cell is held
horizontally.
• Check whether fuel
is leaking by
holding down the
stem.
• The main body is
hot due to
combustion heat.
• The sprayed fuel is
in a liquid state.
• A large amount of
fuel is sprayed.
-16-
(1) Separate the metering
valve and cap from the
gas cartridge.
(2) Press the front side of
the metering valve
forward (stem side)
and downward.
(3) Press the rear of the
metering valve
downward until it seals.
Fig. 14
Corrective action
• Set the metering valve
properly (and rotate the
valve to secure it in
place).
• Replace the metering
valve with a new one.
• Replace the fuel cell with a
new one.
• Replace the fuel cell with a
new one.
• Replace the metering
valve with a new one.
• Allow the main body and
fuel cell to cool down.
• Replace the fuel cell with a
new one.
• Warm up the fuel cell.
Instruct the customers on
such necessary measures
as putting the fuel cell in a
pocket or wrapping it in a
thermal insulating
material.
• Use the nailer where the
altitude is less than 1,500
meters.