Wet Cup, Prime the Pump, Install the Spray Tip

Operation

Wet Cup

Before starting, fill wet cup 1/3 full with Graco Throat Seal Liquid (TSL) or compatible solvent.

Wet

Cup

ti11927a

FIG. 5. Wet Cup

Prime the Pump

1.See FIG. 1. Lock gun trigger. Remove tip guard and spray tip from gun (H). Refer to gun manual.

2.Close gun air regulator (T) and pump air regulator

(X) by turning knobs counterclockwise reducing pressure to zero. Close bleed-type air valve (U). Also verify that all drain valves are closed.

3.Connect air line to bleed type air valve (U).

4.Check that all fittings throughout system are tight- ened securely.

5.Position pail close to pump. Suction hose is about

4 ft (1.2 m) long. Do not stretch hose tight; let it hang to assist fluid flow into pump.

6.Hold metal part of gun (H) firmly to side of grounded metal pail, unlock trigger, and hold trigger open.

7.Units with runaway protection only: enable the prime/flush function by pushing the prime/flush but-

ton on the DataTrak.

8.Open bleed-type air valve (U). Slowly turn pump air regulator (X) clockwise, increasing pressure until pump starts.

9.Cycle pump slowly until all air is pushed out and pump and hoses are fully primed.

10.Units with runaway protection only: disable the prime/flush function by pushing the prime/flush but-

ton on the DataTrak.

11.Release gun trigger and lock trigger safety. Pump should stall against pressure.

Install the Spray Tip

Follow Pressure Relief Procedure, page 13. Install the spray tip and tip guard as explained in your separate gun manual, supplied.

The fluid output and pattern width depend on the size of the spray tip, the fluid viscosity, and the fluid pressure. Use the Spray Tip Selection Chart in your gun instruc- tion manual as a guide for selecting an appropriate spray tip for your application.

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