How to Lubricate Auto Paint Guns

Auto paint guns are a crucial step in the process of painting a car if you want a perfect paint job. An auto paint gun that isn't working properly can cause imperfections in the paint's finish. Paint guns need proper maintenance to function at their best each time. Learn how to lubricate auto paint guns and keep your auto paint gun in top working order for the best paint jobs possible.

Instructions

1

Clean the auto paint gun completely before lubricating. Use paint thinner and spray it as if it were paint so that it moves through the inside of the gun and nozzle, removing all paint.

2

Take the paint gun apart by unscrewing and removing the paint cup and fluid tube. Use the spray gun lubricant recommended for your specific paint gun. This information can be found with the directions and owner's guide or by calling the manufacturer. Begin by adding lubricant to the fluid-needle packing, which is located in front of the trigger and behind the nozzle's end.

3

Apply lubricant to the air-valve packing, which is the area where the trigger is pushed down to spray. Lubricate the trigger-bearing screw, which is where the trigger connects near the top of the gun and pivots. Also lubricate the adjusting screw threads, which are the screws on the back side of the gun that are used for adjusting the air pressure and sprayer.

4

Coat the fluid-needle spring with a light coat of petroleum jelly. The fluid-needle spring is the large spring that engages when the trigger is pulled on the paint gun.

5

Clean the air cap near the front of the gun and the baffle threads where the air cap screws onto the gun. Use spray-gun lubricant to clean all of these parts.