Grizzly G0474, G0475 owner manual Tank air supply valve, opened

6.Point the blast nozzle in a safe direction, and slowly move the blast nozzle lever to the ON or open position to exhaust any air from the tank (see Figure 10).

7.Make sure the air pressure gauge reads zero (see Figure 10).

Figure 10. Tank air pressure at zero PSI.

8.Remove the filler cap, insert the funnel, and carefully—without causing a hazardous dust cloud—pour or spade-in the abrasive into the sandblaster. Use only enough abrasive for your project.

Note: For the Model G0475 10 gallon tank, you can use up to 40 lbs of abrasive, or you can fill the tank to 3⁄4 full. The Model G0474 20 gallon tank can use up to 80 lbs of abrasive, or be filled to 3⁄4 also.

Note: If you fill the tank to 3⁄4 full, and the local humidity is 90-100%, the water trap will not be able to trap all of the moisture from the compressed air. So you must reduce the load of abrasive and fill the tank more often and empty the water trap more often. Otherwise, the sand will clog in the tank outlet and in the blast hose.

9.Brush sand away from the sealing cap and O-ring, and close the filler cap.

G0474/G0475 Sandblasters

10.Close the blast nozzle lever, and turn the compressor on (see Figure 11).

Figure 11. Blast nozzle valve, closed.

11.Adjust the air supply line regulator to an air pressure between 65-125 PSI, depending on your requirements.

12.Move the tank air supply lever to ON or the open position (Figure 12), and the tank will pressurize to your regulated air pressure indicated by the tank gauge.

Note: If the tank relief valve trips open and exhausts air, immediately turn the compressor off and correct the over-pressurization problem with the compressor. If the tank exceeds its rated pressure, it may explode, causing severe injury or death.

Figure 12. Tank air supply valve, opened.

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