If your spray gun trigger becomes floppy or loses resistance, it is due to the internal o-rings on the stainless-steel plunger drying out.
Take these steps to lubricate the plunger and restore proper function to your spray gun:
- Use pliers to unscrew the brass cap at the back of the sprayer.
- Remove the spring.
- Push the plunger from the trigger side, then grip with pliers from the back to remove it.
- Clean out any debris or build-up inside the trigger well.- -Spread a few drops of silicone oil into the cavity and around the o-rings of the plunger. - Replace the plunger, spring and brass cap in reverse order.
- Pump the trigger until it is fully operational.
Handy hint: Periodically lubricating the plunger will keep it operating smoothly. Simply drop some silicone oil on to the silver plunger under the trigger and pump the handle to distribute it.
Important: Use only silicone oil from Hoselink or any hardware store (not water-based WD-40). You can buy silicone oil HERE.