Which action is an essential maintenance step to prevent leaks in a pneumatic system?

• A. Inspect fittings and hoses
• B. Pressure test for leaks
• C. Increase operating pressure
• D. Clean work surfaces around fittings

Answer: (A)

Regular inspection of fittings and hoses is the key practice to prevent leaks in a pneumatic system. Most leaks occur where hoses meet fittings or at the fittings themselves, where connections can loosen, seals degrade, or hoses become cracked from flexing. By routinely checking for loose connections, wear, cracks, frayed hoses, damaged seals, and misalignment, you can tighten, reseal, or replace components before a leak starts. This proactive step keeps system pressure stable, reduces air waste, and lowers the risk of compressor overload. Pressure testing for leaks is helpful for locating existing leaks, but it’s diagnostic rather than preventive. Increasing operating pressure can accelerate leaks and stress components, while cleaning around fittings helps cleanliness but doesn’t address the underlying causes of leaks.