Featured Pump Articles
Gear Pump Troubleshooting Checklist and Videos
March 11, 2021
Viking Pump has provided this knowledgeable checklist of the symptoms and possible causes of internal gear pump failure, as well as short videos. This will help you determine if your pump problem is related to the overall process system, the pump or the drive - and how to fix it.
Pump Troubleshooting Videos
Hydraulic and Mechanical Symptoms List
- Pump turns, but no flow
- Low capacity
- Pump will not develop sufficient pressure
- Pump develops too much pressure
- Pump no longer self-priming
- Pump won't turn/ motor stalls
- Pump runs noisy with excessive vibration
- Pump runs hot
- Frequent seal failures
- Packing has short life
- Excessive wear of the the pump internals
Common Causes of Internal Gear Pump Failure
Here are a few of the common causes of pump failure. Download the PDF checklist to get all the details and a symptom/cause chart.
- NPSHa Not Sufficient
- Air Leaks Into Pump
- Pump Has Run Dry
- Liquid Temperature Higher Than Expected
- Viscosity Higher Than Expected
- Pump Running Too Fast
- Abrasives Incorrect Rotation Incorrect Head Place
- Wrong ClearanceWorn Internals
- Tight Packing Gland
- Improper Seal Installation
- Relief Valve Setting
- Relief Valve Reversed
- Material Corrosion
- Drive Problems
- Vacuum and Pressure Gauges
