Probler P1 Trouble Shooting
This article features a selection of common problems applicators have experienced with the Probler P1 spray gun along with the cause and solution.
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| 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 |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| When the side blocks are removed, there is a material build-up around the chamber | Leaking side block seals | Replace |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| 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 |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| The high pressure ball valves seem loose and may be leaking | Packings out of adjustment | Adjust |
| Damaged | Replace |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| There is a pressure imbalance | Plugged impingement ports | Clean |
| Plugged check valves | Clean | |
| Viscosities are not equal | Adjust temperature to compensate |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| 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 |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| There is air leaking from the trigger retaining nut | The back o-ring on the trigger assembly is cut | Replace |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| When the gun is triggered, the purge air stays on | An o-ring on the air piston is cut or damaged | Replace |
| SYMPTOM | CAUSE | SOLUTION |
|---|---|---|
| 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 |
