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Air Pump

  1. Check all hoses for leaks and make sure leaks are corrected if any are found. Check air pump drive belt tension and adjust if necessary.
  2. Disconnect air pump hose at bypass valve. Connect a suitable pressure gauge to hose. Connect a tachometer to engine.
  3. With transmission in neutral or park and parking brake set, start engine and allow to reach normal operating temperature.
    CAUTION: Position the pressure gauge so that the air blast emitted will be harmlessly dissipated.
  4. Slowly increase engine speed to 1000 RPM and observe pressure produced at pressure gauge. The air pressure must be 2 1/4 psi minimum.
  5. 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.
  6. If air flow does not meet specifications, replace air pump assembly and repeat test.
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