Troubleshooting Guide: Fix Common Bearing Failures in 4 Hours

Grab tools like a thermometer, vibration tester, and wrench. Have a spare same-type bearing, grease, and seals on hand. First, turn off the machine, cut power, and hang a "Under Maintenance" sign. Wear gloves and goggles for safety.

• Find where the noise comes from with a stethoscope, check vibration, and look at the grease.
• If grease is dirty or low, clean and add more. If the bearing is worn or has dirt inside, replace the bearing and seal.

• Measure the temperature, check how the bearing fits, and see if couplings are aligned.
• Adjust the fit or use glue to fix loose fits. Realign couplings if they’re off.

• Test vibration in three directions, check if bolts are tight, and look for damage on rolling parts.
• Tighten loose bolts. If parts are damaged or the base is wobbly, replace the bearing and level with shims.

• Try turning the shaft by hand, check if grease is hard or there’s rust, and see if the shaft is bent.
• Replace hard grease. If there’s rust or the shaft is bent, change the bearing and fix the shaft.

Run the machine without load for 10-15 mins (make sure temp stays below 70℃), then run it at 80% load for 20 mins—no noise or vibration means it’s good. Write down the maintenance details, and remember to check grease every 3 months, replace it once a year.

• If in a rush, use the spare bearing first, check the old one later.
• If no spare, add a little grease temporarily for minor issues, but fix fully within 24 hours.
• If the bearing is stuck, heat its outer ring (not over 100℃) to take it off—don’t hit it hard.