Belt Tension & Alignment Tips for Atlas Copco GX Compressors
Many Atlas Copco GX compressors, including the GX 30, use a belt-driven design to connect the motor to the air end. While simple and reliable, belts require periodic checks and adjustments to maintain efficiency and prevent premature wear.
Why Belt Tension Matters
A loose belt can slip, overheat, or fray, reducing efficiency and risking sudden failures. An overtightened belt places extra stress on bearings and shafts, leading to costly repairs down the line.
How to Check Belt Tension
- Press on the center span of the belt with moderate thumb pressure (about 10 lbs).
- Look for roughly 1/2 inch of deflection. Less movement means it’s too tight; more means it’s too loose.
Adjusting Belt Tension
- Loosen the motor mounting bolts carefully.
- Slide the motor to adjust belt tension as needed.
- Check deflection again before fully tightening the bolts.
Check Alignment Too
After setting tension, ensure pulleys are aligned in the same plane. Misalignment can cause belt edge wear, vibration, and noise. Use a straightedge or laser alignment tool across pulley faces to verify.
Inspect Regularly
- Visually inspect belts every 2,000 hours or during routine maintenance.
- Look for cracks, fraying, glazing, or uneven wear.
- Replace belts showing any signs of damage.
Protect Your Compressor and Avoid Failures
Consistent belt maintenance ensures your GX compressor runs smoothly, reduces stress on key components, and avoids unplanned downtime.