Air Valve Spring

Fig. 8 Adjusting air valve spring:

1. Loosen lock screw, Fig. 8.
2. Turn tension adjusting screw counterclockwise until air valve is partially open.
3. Turn tension adjusting screw clockwise until air valve just closes, then turn adjusting screw clockwise proper number of turns.
4. Tighten lock screw.
5. Apply lithium base grease to lubricate contact area.