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O-ring (I.D 10.7) at the
outside of the valve bushing
is abnormal (worn,
damaged or broken).
Use specified nails.
See <Magazine> in item 1).
Replace the part.
See <Output section: Piston,
driver blade, etc.> in item 1).
Check if the nails are
specified ones.
Check if they move
smoothly after putting nails,
and check if the nail feeder
operates smoothly.
Check if the driver blade tip
is worn.
Perform idle driving or
actually drive with nails, and
check if the driver blade has
returned completely.
Unspecified nails used.
< Improper nail feed >
See <Magazine> in item 1).
Driver blade worn.
< The driver blade has not
returned completely. >
See <Output section:
Piston, driver blade, etc.>
in item 1).
Air pressure is too low.
Workpiece is very hard.
Driver blade is worn.
Piston O-ring is abnormal
(worn or damaged).
Cylinder's internal surface is
abnormal (worn or rough).
Problem
Possible cause
Inspection method
Remedy
Adjust for 5 to 8.5 kgf/cm
2
.
Do not use unspecified
workpieces.
Replace the driver blade.
Replace the defective part.
3) Head of a nail
driven into a
workpiece
protrudes
from the wood
surface.
Drive a nail into soft wood
workpiece and check if the
head protrudes from the
wood surface.
Operate the nailer without
nails and check if the driver
blade is projected from the
nose tip.
Disassemble the output
section and check the
piston O-ring, O-ring and
the inner/outer surfaces of
the cylinder for abnormal
condition.
4) Nails clog the
mechanism.
Replace the defective part.
Replace the defective part.
Set the single actuation/
contact actuation selector to
the single actuation.
Perform idle driving once
and keep the trigger pulled
backward. Check that no
air leaks from the inside of
plunger (B) and valve
sleeve (A).
Disassemble the control
valve and check the O-ring.
Plunger O-ring (inside the
valve bushing) is abnormal
(worn or broken).
O-ring (P-9, inside the valve
sleeve) is abnormal (worn
or broken).
5) Single
actuation
impossible.
6) Piston
actuates just
by pulling the
trigger (when
single
actuation is
selected).
