A Roots blower on round-the-clock aeration runs about 8,700 hours a year. Most failures we see on site start with something small that was missed for a few months.
Daily
- Note discharge pressure and motor current, and compare them with the commissioning values
- Listen for new knocking or rubbing noise
- Check the oil level in the gear end and drive end sight glasses
- Look for oil leaks at the shaft seals
Weekly
- Clean or check the inlet filter, more often on dusty sites
- Check belt tension and condition
- Confirm the safety valve is free and not passing air
Monthly
- Check foundation bolts and anti-vibration mounts
- Inspect the non-return valve and flexible connectors
- Record bearing temperatures
At the oil change interval
- Change the gear oil with the grade the manufacturer specifies
- Inspect belts and pulleys for wear
- Check timing gear backlash if noise has gone up
Rule of thumb
A rise in motor current at the same pressure usually means a choked filter or fouled diffusers, not a blower fault.
Keep the standby in rotation
Run the duty and standby units in turn, for example weekly. Both stay healthy and you know the standby will start when you need it.
Conclusion
Our AMC visits follow this checklist and keep a record of the readings, so trends show up well before a breakdown.
