Technical Information
Frequently Asked Questions - Pumps & Motors
At Southern Rewind Ltd, we specialize in troubleshooting AC/DC electric motors, generators, water system accessories, and pumps. With extensive experience across multiple brands and models, we’ve encountered common questions from our customers over the years. Below are answers to frequently asked pump-related concerns.
Common Pump Issues & Solutions
1. Will a more powerful motor make my pump move liquid faster?
Answer: No. The flow rate depends on a combination of factors:
Motor power
Impeller rotation speed
Impeller and casing size
Changing just the motor without adjusting the other components may cause damage.
2. My pump is running, but no liquid is being pumped. What’s wrong?
Answer: Several factors could be affecting liquid flow, such as:
An improperly primed pump
Blockages in the casing or pipes
Issues within the liquid supply, suction line, pump, or discharge line
For a full diagnostic, consult a professional to prevent further complications.
3. Why does my pump make a crackling sound, and why is the pressure unstable?
Answer: These are symptoms of cavitation, which occurs when air bubbles form near the impeller’s eye. This can cause severe pump damage if left unchecked. Contact a specialist to resolve the issue.
4. Why are my pump bearings overheating?
Answer: Overheating bearings typically indicate increased friction due to improper lubrication. Ensure the bearings have the correct amount of lubrication—either too much or too little can cause problems.
Temperature Monitoring for Bearings
When monitoring pump bearings, consider the following temperature guidelines:. If using synthetic lubricants, add 30°C to these value
Bearing Lubrication Intervals
Grease deteriorates over time due to oxidization or evaporation. Follow manufacturer guidelines for re-lubrication or use the table below as a reference.
