Signs Your Pump Needs Repair

Pumps rarely fail without warning. Learning to recognize the early signs of trouble can prevent costly emergency repairs and unplanned downtime. Here are the key indicators that your pump needs professional attention.

Unusual Noises

Cavitation

A crackling or rattling sound often indicates cavitation—the formation and collapse of vapor bubbles in the pump. Cavitation damages impellers and can destroy a pump quickly. Causes include insufficient NPSH, restricted suction, or operating off the design point.

Bearing Noise

Grinding or rumbling sounds suggest bearing problems. Worn bearings create excessive clearance and vibration. Catch bearing issues early, as failed bearings can damage shafts and housings.

Mechanical Seal Squealing

A high-pitched squeal often means the mechanical seal is running dry or has lost lubrication. This can happen during startup or when the pump loses prime. Address immediately to prevent seal destruction.

Vibration Changes

Any change in vibration patterns warrants investigation. Increased vibration can indicate imbalance, misalignment, worn components, or structural problems. Baseline vibration measurements help identify changes over time.

Performance Degradation

Reduced Flow

If the pump isn't delivering its rated flow, check for worn impellers, increased internal clearances, or system problems like partially closed valves or clogged strainers.

Pressure Fluctuations

Unstable pressure readings suggest air entrainment, cavitation, or mechanical problems. Check suction conditions and verify the pump is operating within its design envelope.

Visual Warning Signs

Leakage

Any visible leakage from seals, gaskets, or the pump casing needs attention. Even small leaks can indicate larger problems and create safety hazards.

Corrosion and Erosion

Visible deterioration of pump components suggests aggressive fluid conditions or material compatibility issues. Document the damage pattern to help identify the cause.

Temperature Changes

Elevated bearing temperatures, hot spots on the casing, or overheating motors all indicate problems. Infrared thermography can identify hot spots before they cause failures.

Take Action Early

Don't wait for complete failure. If you notice any of these warning signs, contact WTPS for a professional assessment. Early intervention saves money and prevents production losses.