Graco 3A2495C important safety instructions Test Gun Barrel Resistance

Electrical Tests

Test Gun Barrel Resistance

1.Insert a conductive rod (B) into the gun barrel (which was removed for the power supply test) and against the metal contact (C) in the front of the barrel.

2.Measure the resistance between the conductive rod (B) and the conductive ring (9). The resistance should be 10–30 megohms. If the resistance is incorrect, make sure the metal contact (C) in the barrel and the conductive ring

(9) are clean and undamaged.

3.If the resistance is still outside the range, remove the conductive ring (9) and measure the resistance between the conductive rod (B) and the wire lead at the bottom of the conductive ring groove.

4.If the resistance is in range, replace the conductive ring (9) with a new one. Insert the ends of the conductive ring into the slots (S) at the front of the barrel, then press the ring firmly into the groove (G).

The conductive ring (9) is a conductive (metal) contact ring, not a sealing o-ring. To reduce the risk of fire, explosion, or electric shock:

•Do not remove the conductive ring except to replace it.

•Never operate the gun without the conductive ring in place.

•Do not replace the conductive ring with anything but a genuine Graco part.

5.If the resistance is still outside the range, replace the gun barrel.

Figure 19 Test Gun Barrel Resistance

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