Pro Rider Operations Manual
Rev. 08/2016
Page | 19
Priming Catalyst to Gun:
1.
Remove the catalyst tip and spray tip from the front of the gun.
2.
Tighten the catalyst packing nut
– 1/8 to 1/4 of a turn to snug packing.
3.
Fill the catalyst jug ¾ full, purge the air out of the catalyst feed line by slightly tilting
the catalyst jug toward the outlet fitting.
4.
Lock or hold the gun trigger in the open position over an appropriate container.
5.
Remove the pin from the slave arm and catalyst pump bearing block. Use the
priming knob to hand prime catalyst out to the gun until a steady stream is
achieved.
6.
Release the trigger to close the gun.
7.
Replace the pin into the slave arm and catalyst pump bearing block
– be sure that
the catalyst pump is positioned at the correct percentage.
Note: Be sure the top and bottom of the catalyst pump are set to the same
percentage on the slave arm to prevent damage to the catalyst pump.
Gun Set-Up
& Spray:
Note: Use a little red grease on the o-rings and threads before installing the spray
tip, catalyst tip and retainer.
1.
Install the Gel Coat Spray Tip into the front of the gun block.
2.
Install the Catalyst Tip over the Spray Tip. Use caution not to damage the o-rings
on the front of the gun block.
3.
Install the retainer to secure Catalyst Tip and Spray Tip in place.
4.
Spray a test pattern: Slowly make gel coat pump pressure adjustments until a fairly
uniform pattern is achieved. There should be slight horns (lines) on either side of
the spray fan. For the ATG-3500 Gel Coat Gun - Slowly open the air-assist needle
valve located on the side of the gun handle until a soft uniform pattern is achieved.
One of the most important concepts is to use just enough pressure to the power head to
establish a good spray fan, and no more. Then use the Air Assist to fine tune or do final
adjustment to the spray pattern.
