U.S. Motors pool pump vibrates excessively and may move on the pad; plumbing shakes during operation.

Safety first: Turn off power before touching the pump or plumbing.

• Check for air in pump: Look through the pump lid for large air pockets. Bleed air by re-priming and fixing suction leaks.
• Inspect mounting: Ensure the U.S. Motors pump base is firmly bolted to a solid, level pad. Tighten mounting bolts.
• Check impeller: Disassemble the wet end and inspect the impeller for missing pieces or warping. Replace if damaged.
• Verify alignment: Ensure the motor is properly seated against the seal plate and that all bolts are evenly tightened to avoid distortion.
• Test at lower speed: On variable-speed models, run at a lower RPM to reduce vibration while diagnosing.