Air Valve Spring

Fig. 5 Air valve spring adjustment:

1. Loosen lock screw.
2. Turn tension adjusting screw counterclockwise until air valve opens part way, Fig. 5.
3. Turn tension adjusting screw clockwise until air valve just closes. Then, turn adjusting screw clockwise the number of turns specified.
4. Tighten lock screw.
5. Apply lithium base grease to lubricate contact area.