5
YES
NO
The pump cannot be
operated.
Check if the air regulator
is normally operated.
Check if the valve on the
outlet on the pump side
is not closed.
Remove the lower pump
and operate the air motor
independently.
Check if the valve in the
course of piping is not
closed.
Clogging occurs in the
connecting hose, pipe,
outlet valve, or gun.
The lower pump is faulty.
The packing seal of the
air motor is worn away.
Ask for servicing the
lower pump and see
P.7.
The pump is
continuously
operated without
stop.
Check if there is any
open valve on the
material output side.
Check if the material
does not leak at the
exhaust port of the air
motor.
The air motor is faulty.
Ask for servicing the
air motor
When the outlet side is
closed, check if any leak
does not occur on the
pipe, connecting hose or
its connecting portion.
The valve of the lower
pump or the packing is
worn away.
The pump operated
but the material is
not fed by pressure.
The pump can be
operated but the
discharge volume is
insufficient.
The material vessel is
empty.
Check if the supply air
pressure is not lowered.
Check and re-supply, or
replace.
The air supply volume
to the pump is
insufficient. Replace
the air hose with a
thicker one or check
the air compressor.
check
check
operable
Increase the pressure up
to 0.7MPa by the air
regulator. At this time, the
oil volume does not reach
the specified level.
The valve seat surface of
the lower pump, the
packing is worn away or
clogging is caused by
dust or foreign
substances.
NO
YES
NO
YES
inoperable
YES
NO
5. Maintenance and Inspection
5.1 Troubleshooting and Corrective Measures
If the pump operation becomes unstable or trouble is caused to its oil discharge during operation, make a check
according to the following procedure.
Symptom
Cause
Contents of inspection and corrective measures
Summary of Contents for SGR-55 880267
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