Air Pump
- Check air pump for abnormal noise. Check discharge pressure by connecting tester (SST 09258-14010) to hose at the pump outlet. Select and use a specified orifice .217" (5.5 mm) on the SST tester.
- Start engine and set engine speed at 1800 RPM. The test gauge should read in the Green zone. If SST tester indicates in the Red zone, replace pump assembly.