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Patriot Multi-Color Gelcoater Operations Manual
Page | 24
22. Allow pump to run until a steady stream of gelcoat is being dispensed.
23. Close the gun and clean as follows:
For external mix system:
Brush the front of the gun head clean with solvent.
For internal mix system:
Flush the mix chamber clean.
24. Slowly increase gelcoat pump pressure to 100 psi (7 bar).
25. Allow the unit to set under static load for 15 to 30 minutes to seat the resin packing set.
26. Turn the pump regulator to zero.
27. Slowly open the ball valve at the bottom of the resin filter to drain the fluid pressure.
28. Repeat priming to gun each time you change fluid sections/colors.
Charging the Gelcoat Surge Chamber (if applicable)
29. Open the ball valve below the inline resin filter.
30. To charge the resin surge chamber, use the air hose with the female quick disconnect
(charging hose) and insert it over the male quick disconnect at the top of the resin surge
chamber.
31. Push down on the female quick disconnect for 5 to 10 seconds and disengage.
32. Close the ball valve below the inline filter.
Pressurize Fluids
33. Push the priming button and slowly increase the gelcoat pump regulator to between 40 and
50 psi as a starting point.
Note
On the air manifold, the blue valve is the safety override. The small brass
button is the priming button. The safety override valve automatically opens
and closes the air supply to the pump air motor. The safety valve opens when
the gun is triggered or when the priming button is pushed.
34. Move the catalyst drive arm slowly up and down to pressurize the catalyst pump as follows:
For external mix system:
Prime a little pressure; there is no gauge on this system to determine
an exact setting.
For internal mix system:
Prime to between 200 and 400 psi. There should be gain in pressure
on both the up and down strokes; watch the catalyst gauge to determine this is occurring.
35. Pin the catalyst drive into the pivot arm at the desired catalyst percentage.
Set Up the Gun
External Mix
36. Use a little red grease on the O-rings and threads of the spray tip, catalyst tip, and retainer.
37. Install the gelcoat spray tip into the front of the gun block.