5
4.
How to Operate the Pump
WARNING
- The supply air pressure to the pump should be 0.7 MPa or less. Do not raise the pressure over 0.7
MPa in any case.
- Never bring the face close to the exhaust port of the pump that is in operation. The material is
discharged under high pressure, so water may congeal and injury may be caused by ice.
- If the air supplied to the pump is not shut off after completion of the work or at night, the hose
may be damaged or leak may occur on the valve or gun, thereby causing a secondary accident.
This secondary accident shall be attributable the user’s responsibility.
- If the pump goes to a malfunction or into an operation stop status, do not disassemble the pump
carelessly but refer to the item pertaining to “5.1 Troubleshooting and Corrective Measures”.
Judge the status properly and do not disassemble any component other than the component that
needs to be assembled.
<NOTE>
- After completion of the work or when the pump is not operated for a long time, shut off the air to stop
the supply air to the pump and open the discharge port valve to reduce the internal pressure of the
pump and hose.
- If the oil in the drum can has be exhausted, the pump is operated at a higher speed without oil and
has an adverse effect on its life. Stop the pump operation at once and replace the drum can with a
new one. For replacing the drum can, observe the item pertaining to “3.1 Installing the Drum Pump”.
- The distance for pressure feed differs depending on the viscosity, temperature, and required flow rate
of oil. Regarding details, please ask Yamada Corporation or the dealer for further information.
1)
Turn the knob of the air regulator clockwise to supply air into the pump. When the supply air
pressure reaches 0.15 - 0.20 MPa, the pump starts to operate. The supply air pressure is indicated
by the pointer of the pressure gauge.
2)
When air is supplied, the pump is operated for a while to fill the hose, pipe, and gun with oil, and
then stopped automatically.
If the pump is continuously operated without stop, leak may have occurred in any connecting portion
of the hose, pipe or gun. Stop the air supply and make a check.
3)
Oil is discharged by operating the gun lever at the end of the material hose. When the lever is pulled,
the valve is opened and the pump is automatically operated to discharge oil.
When the lever is reset, the valve is closed to stop the oil discharge and the pump is also stopped.
4)
Adjust the supply air pressure according to the application. Usually, the operating pressure should
be 0.3 - 0.5 MPa. In particular, when the pump is used for feeding oil, the discharge volume differs
depending on the piping length and oil viscosity. Adjust the supply air pressure to your desired level.
5)
After completion of the work, be sure to stop the supply air to the pump.
