Air Pump
- Check all hoses for leaks and correct as necessary. Check air pump drive belt tension and adjust if necessary.
- Disconnect air pump hose at by-pass valve. Connect a pressure gauge to hose. Connect a tachometer to engine.
- With transmission in Neutral or Park and parking brake set, start engine and allow to reach normal operating temperature.
- Slowly increase engine speed to 1000 RPM. The air pressure must be 21/4 psi minimum. If pressure gauge is not available, run engine at 1500 RPM and place hand over open end of hose. Air flow should be felt and heard.
- If air flow does not meet specifications, replace air pump assembly and repeat test.