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Frequently Asked Questions

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Possible Faults and Removal/Solution

Faults
Reason
Removal / Solution
Pump fails to discharges any liquid
  1. Air leaking into suction or gland.
  2. Incorrect direction of pump rotation & impeller worn.
  3. Suction pipe blocked.
  1. Sealed leakage.
  2. Check direction of rotation and replacing impeller
  3. Removal block.
Shaft power consumption is excessive.
  1. Gland excessively tightened against packing rings.
  2. Rotating component rubbing on a stationary part.
  3. Bearing warn.
  4. Drive a belt tension too tight.
  5. Flow rate too large.
  6. Pump speed & ratio too high .
  7. Misalignment or unparallel of drive shaft and pumps shaft
  1. Loosen gland bolts.
  2. Removal the rubbed part.
  3. Replace the bearing.
  4. Adjusting belt.
  5. Modifying the Pump duty and speed.
  6. adjusting drive & pump shaft
Bearing is over heating.
  1. Lubricants too much or less.
  2. Containing impurities in the lubricant.
  3. Bearing worn.
  1. Lubricating as requirements.
  2. Replace new lubricant.
  3. Replace new bearing.
Bearing has short life
  1. Misalignment or unparallel of drive and pump shaft.
  2. Shaft bent.
  3. Impeller unbalanced due to wear.
  4. Foreign object entered into the bearing or insufficient lubrication.
  5. Incorrect Procedure followed in fitting bearings.
  1. Adjusting drive and pump shaft.
  2. Replacing shaft.
  3. Remove rubbing and replacing new impeller.
  4. Clean the bearing.
  5. Replacing or refitting the bearing .
Excessive leakage from stuffing box
  1. Packing rings excessive worn.
  2. Shaft sleeve worn.
  3. Dirty sealing water.
  1. Replace new packing rings.
  2. Replace shaft sleeve.
  3. Change clean sealing water
Pump vibrates or is noisy.
  1. Bearing worn.
  2. Impeller unbalanced.
  3. Air entered into suction pipe or blocked.
  4. Flow rate non-uniform and pump not primed.
  1. Replaced by new bearings.
  2. Replaced by new impeller.
  3. Discharge air and remove block.
  4. Improve on the Pump feeding.