Check Valves

Check valves are located at the air control valve exhaust port outlet and in the air supply line between the air control valve and pellet converter.
To test exhaust port check valve, detach air pump-to-air control valve hose at air control valve. To test converter check valve, detach air control valve-to-pellet converter hose at air control valve. Test each valve separately using the following procedure:
With engine at normal operating temperature, connect tachometer to engine. Detach hose for valve to be tested. Start engine and increase engine speed to 1500 RPM. Watch for exhaust leak. If leak exists, replace check valve being tested.