| There is air to the gun, and air purge is good. When gun is triggered, the piston is sluggish to retract or doesn’t move. |
Guide channel in the front housing is dirty |
Inspect and clean if needed |
|
Air starvation |
Clean air ports in handle |
|
Damaged air piston o-rings |
Replace |
| When the side blocks are removed, there is a material build-up around the chamber. |
Leaking side block seals |
Replace |
| The mixing chamber does not line up with the holes in the side block seals when the gun is triggered. |
The piston throw set screw is out of adjustment |
Reset Piston Throw |
| The high pressure ball valves seem loose and may be leaking. |
Packings out of adjustment |
Adjust |
| There is a pressure imbalance. |
Plugged impingement ports |
Clean |
|
Viscosities are not equal |
Adjust temperature to compensate |
| The gun continuously leaks air from the bottom of the handle. |
Middle o-ring on the trigger assembly is cut |
Replace |
|
Trigger adjustment nut is out too far |
Adjust |
| There is air leaking from the trigger retaining nut. |
The back o-ring on the trigger assembly is cut |
Replace |
| When the gun is triggered, the purge air stays on. |
An o-ring on the air piston is cut or damaged |
Replace |
| The Probler is leaking air from between the gun body and the front housing. |
The o-ring that seals between these two parts is damaged |
Replace |
