Disassembly All screws addressed in this procedure are No. 15 Torx. The air motor cover is under spring pressure. Use caution when removing screws and releasing that pressure. 1. With a No. 15 Torx screwdriver, remove the 8 Torx screws holding the air motor cover. To control the spring pressure, place VRO pump on your bench with the air motor cover facing upward. Hold down on cover while removing screws. Set cover, screws, 0-ring, and two springs aside. 2. Remove the 6 Torx screws attaching the inlet housing to the intermediate housing and separate these parts. As you lift the inlet housing, the oil piston will be drawn out of the oil pump. 3. Hold the intermediate housing and air motor piston in one hand, and use the other to unscrew the fuel piston - pull gently with a counterclockwise motion. 4. Remove the fuel piston and the air motor piston from the intermediate housing. 5. Remove the stem from the piston. Discard the stem and the steel washers. Set the flapper valve and nylon washer/retainer aside. Clean all parts with OMC Cleaning Solvent and inspect for wear and damage. Replace any suspect parts.