Magnum Venus Plastech ATG Gel Coat Gun - Manual (Page 18)

ATG Chopper Gun Manual
Rev. 05/2012 Page | 18
Note: The hole in the catalyst cylinder has to line up with the hole in the gun
head that the set screw will be installed into.
14. Reinstall the catalyst cylinder into the gun head by rotating it back and forth
while pushing it into the gun head. Use caution not to damage the o-rings.
Align the hole in the catalyst cylinder with the hole in the side of the gun head.
Set Screw
Set Screw with
Catalyst Weep Hole
15. Replace the set screws back into the gun head.
16. Using a 5/16 nut driver remove the diffuser seat from the front of the gun.
17. Using special tool ATC-40323-BT remove the cartridge assembly from the
front of the gun.
18. Pull the resin needle piston assembly from the back of the gun head.
19. Replace the o-ring on the resin needle piston
20. Remove the packing retainer from the back of the gun head and replace the
o-ring with a new one.
21. Replace the packing retainer into the back of the gun head.
22. Replace the o-ring for the resin cylinder seal.
23. Replace the two tip pin o-rings on the front of the gun.
24. Remove the catalyst cylinder plug on the front of the gun head and replace
the o-ring.
25. Reinstall the catalyst cylinder plug into the front of the gun head.
26. Replace the o-ring on the diffuser seat.