Fault Phenomenon: Ingersoll Rand air hoist under rated air pressure, the no-load speed is significantly lower than standard.

Troubleshooting Process:
– Checked inlet pipe diameter: pipe diameter too small, causing restriction.
– Checked muffler: muffler clogged.
– Checked vanes: vanes severely worn.
– Replaced with larger diameter hose, cleaned muffler, replaced vanes.

Root Cause: The air motor vanes were worn and the exhaust muffler was clogged.

Required Parts: Air motor vane set, muffler.