EQUIPMENT
PROBLEM
CAUSE
REMEDY
pump
Abnormal noise
Bearing failure.
Rubbing of rotary parts.
Spider failure.
Loose base bolts.
Change the bearing.
Avoid the rubbing.
Change the spider
Tighten them and check the alignment.
Too hot
Poor lubrication.
High friction between
Rotary parts
Lubricate properly.
Reduce the friction
More vibration
Loose fittings. No proper support on piping or tension in piping.
Misalignment of couplings.
Tighten the fittings.
Support piping and remove the tension.
Re align it and check the love joy bush
Frequent leak in the stuffing box
Poor quality of gland ropes improper size of the ropes groove in the shaft sleeve
Use right quality ropes.
Choose correct size.
Change the sleeve.
Oil seal damage is frequent
Poor quality groove in the path of the shaft.
Go for good brand.
Fill the groove by metalizing and machine it to the right size or shift the seating area of the oil seal on the shaft if space permits.
Mechanical seal failure
Impeller may be worn out
In sufficient flow of cooling water.
Improper gland alignment.
Check the diameter of the impeller and change if necessary.
Open/check cooling water valve. Change the seal and align gland properly.
Poor efficincy
Clearance in between impeller and casing may be more RPM of the prime mover may be less
Adjust the clearance.
Choose the right prime mover.
Pump is tripping often
Over load due to :
Bearing might have gone.
Misalignment.
Shaft may be bent.
Foreign particle clogged in the casing.
Change the bearing.
Realign it
Replace with new shaft.
Remove it.
Pump is running but not pumping
Low level or no level of the liquid.
Drawing air in the suction or stuffing box.
Choke in the suction line.
Wrong direction of rotation.
Maintain the level.
Remove the air lock or avoid the air suction.
Prime the pump.
De choke the line.
Change the electrical connection.
PROBLEM
CAUSE
REMEDY
pump
Abnormal noise
Bearing failure.
Rubbing of rotary parts.
Spider failure.
Loose base bolts.
Change the bearing.
Avoid the rubbing.
Change the spider
Tighten them and check the alignment.
Too hot
Poor lubrication.
High friction between
Rotary parts
Lubricate properly.
Reduce the friction
More vibration
Loose fittings. No proper support on piping or tension in piping.
Misalignment of couplings.
Tighten the fittings.
Support piping and remove the tension.
Re align it and check the love joy bush
Frequent leak in the stuffing box
Poor quality of gland ropes improper size of the ropes groove in the shaft sleeve
Use right quality ropes.
Choose correct size.
Change the sleeve.
Oil seal damage is frequent
Poor quality groove in the path of the shaft.
Go for good brand.
Fill the groove by metalizing and machine it to the right size or shift the seating area of the oil seal on the shaft if space permits.
Mechanical seal failure
Impeller may be worn out
In sufficient flow of cooling water.
Improper gland alignment.
Check the diameter of the impeller and change if necessary.
Open/check cooling water valve. Change the seal and align gland properly.
Poor efficincy
Clearance in between impeller and casing may be more RPM of the prime mover may be less
Adjust the clearance.
Choose the right prime mover.
Pump is tripping often
Over load due to :
Bearing might have gone.
Misalignment.
Shaft may be bent.
Foreign particle clogged in the casing.
Change the bearing.
Realign it
Replace with new shaft.
Remove it.
Pump is running but not pumping
Low level or no level of the liquid.
Drawing air in the suction or stuffing box.
Choke in the suction line.
Wrong direction of rotation.
Maintain the level.
Remove the air lock or avoid the air suction.
Prime the pump.
De choke the line.
Change the electrical connection.
