A measured S-cam pushrod travel is 1-3/4 inches, and no manufacturer specification allows it. What does the Nova Scotia procedure indicate?

1. The brake needs adjustment because it exceeds the 3/4 to 1-1/2 inch range
2. The brake is perfect because any travel under 2 inches is always accepted
3. The gauge must be tapped instead of adjusting the brake
4. The low-air warning device has failed