Minimum Pump Flow Test
- Decrease engine speed to 600 RPM. Slowly close shut-off valve to increase pressure to 1200 psi (84.4 kg/cm2 ). Record flow rate at 130°F (54°C).
- If flow rate is less than 2.2 gals. (8.3L) per minute, pump may need service, especially if flow rate at 2200 RPM is less than specification.