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Problem
Possible cause
Inspection method
Remedy
Check if nails can be driven
at 5 kgf/cm
2
.
Cylinder's internal surface is
abnormal (deposits of dirt,
or worn).
Driver blade is abnormal
(deformed, burrs, damaged
or fatigued).
Cylinder ring is abnormal
(dislocated, deformed or
damaged).
Replace the piston bumper.
Reassemble or replace.
Remove the dirt and apply
oil, or replace.
Replace the defective part.
Air pressure too low.
Piston O-ring is worn or
damaged.
Set the single actuation/
contact actuation selector to
the contact actuation. Pull
the nail feeder backward to
perform idle driving. Check
if the driver blade has
returned.
Adjust for 5 to 8.5 kgf/cm
2
.
<
Output section>
Replace the piston o-ring.
Plunger (A), plunger (B) or
valve bushing is abnormal
(galled or damaged).
After making idle driving,
check if the driver blade is
kept in the down position.
Replace the defective part.
<
Control valve section>
Cylinder's external surface
(sliding surface between the
cylinder guide and the
clyinder plate) is abnormal
(deposits of dirt or worn).
Repair or replace.
Apply grease.
Replace the head valve
spring.
O-ring is worn or oiling is
needed.
Apply grease or replace.
Disassemble the control
valve and check the O-ring.
2) Nails are bent
when being
driven.
See item 1).
Driver blade is worn.
Nails are not fully fed into
the injection port.
Do not use unspecified
workpiece.
Unspecified nails are used.
Replace the driver blade.
Workpiece is very hard.
Check if the driver blade tip
is abnormally worn.
Drive a nail into soft wood
workpiece and check if the
nail is bent.
See item 1).
Piston bumper is abnormal
(dislocated, deformed or
damaged.)
Cylinder spring is abnormal
(fatigued or damaged).
