After replacing the range shift slave valve, which statement accurately describes the correct condition?

After replacing the range shift slave valve, which statement accurately describes the correct condition?

• A. Neither A nor B
• B. Lines between the slave valve and range cylinder could be crossed.
• C. A constant flow of air from the exhaust port of the control valve is normal.
• D. Both A and B

Answer: (C)

Air-operated range shift circuits rely on venting the pilot control to atmosphere. The exhaust port on the control valve is not blocked; it vents excess air to relieve pressure and allow the valve to reset. After replacing the slave valve, seeing air flow from this exhaust port is expected and indicates the pilot circuit is venting as designed and the system is ready to operate. If the lines between the slave valve and the range cylinder were crossed, that would lead to incorrect shifting behavior, which isn’t a normal condition. So the normal condition described is a constant flow of air from the exhaust port, reflecting proper venting of the pilot circuit.

Air-operated range shift circuits rely on venting the pilot control to atmosphere. The exhaust port on the control valve is not blocked; it vents excess air to relieve pressure and allow the valve to reset. After replacing the slave valve, seeing air flow from this exhaust port is expected and indicates the pilot circuit is venting as designed and the system is ready to operate. If the lines between the slave valve and the range cylinder were crossed, that would lead to incorrect shifting behavior, which isn’t a normal condition. So the normal condition described is a constant flow of air from the exhaust port, reflecting proper venting of the pilot circuit.