YAMADA KGK-100 Series, Instruction

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6
6. Troubleshooting
<Problem>
- Material cannot be discharged.
- Material comes out during Recharge or Standby.
- Material leaks.
<Possible Cause>
Metering gun (external factor)
- Material is not being delivered.
- Material supply pressure (primary pressure)
exceeds the specified pressure of the metering gun.
- Adjustment at the initial use or after repair was
not done.
- Air inside the gun is not released.
Metering gun body
- Ball or valve seat is damaged or worn out
- O ring is damaged or worn out.
- Side ring is damaged or worn out.
- Adjustment screw is loose.
Metering cylinder
- Inner surface of cylinder is damaged or worn out.
- Outer surface of piston, packing, or sleeve is
damaged or worn out.
- O ring is damaged or worn out.
- Adjustment screw is over tightened.
PRECAUTION FOR USE
- Be sure to shut off the air supply to a supply pump and set the material pressure (primary pressure) to
zero. Leaving a metering valve under pressure will be a cause of material leak or some other problem.
- Once a metered shot is dispensed, be sure to put the valve back to the standby condition.
- Do not use material which contains dirt and dust. Seal parts will be damaged, causing a material leak.
<Solution>
- Check the supply pump and supply
air.
- Check air pressure in the supply
pump (primary pressure = pump
ratio × air pressure)
- Perform Adjustment and Discharge
Test on the previous section.
- Release air completely.
- Replace with new ones.
- Replace with new ones.
- Replace with new ones.
- Readjust the screw and securely
tighten it with a locknut.
- Replace with new ones.
- Replace with new ones.
- Replace with new ones.
- Adjust the adjustment screw to your
desirable shot amount and then
secure it with a locknut.