YAMADA DR110A50, Инструкция, Страница: 9 / 14

4
5. Maintenance and Inspection
5.1 Troubleshooting and Corrective Measures
If the pump operation becomes unstable or trouble is caused to its grease discharge during operation,
make a check according to the following procedure.
Symptom Check method Corrective measure
The pump cannot be
operated.
Check if the valve in
the course of piping is
not closed.
Check if the air
regulator is normally
operated.
Pressure check
0.3 to 0.7 MPa
Check if the valve on
the outlet on the pump
side is not closed.
Check
Clogging occurs in
the connecting hose,
pipe, outlet valve, or
gun, or the operating
pressure is low.
Remove the lower
pump and operate the
air motor
independently.
The lower pump is
faulty.
The air motor is
faulty.
Ask for servicing
the lower pump
(Maintenance
Manual)
The pump is
continuously operated
without stop.
Check if grease does
not leak at the exhaust
port.
Check if there is any
open valve on the
material output side.
The packing seal of
the air motor is worn
away.
The valve of the
lower pump is
defective or worn
away.
The pump can be
operated but
grease is not fed by
pressure.
When the outlet side is
closed, check if any
leak does not occur on
the pipe, connecting
hose or its connecting
portion.
Check or re-supply
Check if there is no
grease or the vessel
becomes hollow.
Increase the pressure
up to 0.7 MPa by the
air regulator. At this
time, the grease
volume does not
reach the specified
level.
The air supply
volume to the
pump is
insufficient.
Replace the air
hose with a thicker
one or check the
air compressor.
The pump can be
operated but the
discharge volume
is insufficient.
Check if the supply air
pressure is not
lowered.
The valve seat surface
of the lower pump is
worn away or clogging
is caused by dust or
foreign substances.
YES
check
NO
check
NO
check
operable
inoperable
YES
NO
NO
YES
YES
NO
Ask for servicing
the air motor.
(Maintenance
Manual)