Operation Testing
- Disconnect carburetor throttle rod from bell crank. Start engine and check actuator operation. Check that the diaphragm makes a smooth reciprocating motion when power is applied to terminals 1 and 2.
- Actuator terminal 3 should be grounded to the body or, subsequently, power should be removed from only terminal 2.
- Confirm that the cable does not return easily when pulled with 4-7 lb. (2-3 kg) of force. Check that the vacuum hose is connected. If the operation is not as specified, replace the actuator.