Howden Roots Air Blower URAI-G 45

Is the unit direct coupled to the driver?

Check shaft and coupling alignment carefully and make any necessary corrections.

Enter the total indicator reading for maximum deviation in offset alignment of the shafts.

Enter the maximum deviation from parallel of the inside coupling faces.

Is there sufficient gap between the coupling halves and the element to prevent thrust loading the blower bearings?

Describe any necessary corrections made during the alignment check.

Verify all conditions remain steady or acceptable

Check lubricant levels in gearbox and bearing reservoirs

Check driver lubrication practices according to manufacturer's instructions

Inspect and grease coupling if direct connected to blower

Check belt tension and inspect for frayed or cracked belts

Observe oil levels at reasonable intervals during final run

Shut down if excessive noise or local heating develops

Shut down if pressure or temperature rise exceeds specified limits

Loosen blower mounting bolts and reset leveling and drive alignment

Tighten mounting and ensure piping meets blower connections accurately

Disconnect piping to clean blower interior thoroughly

Clean out interior of impeller lobes to restore dynamic balance

Ensure no foreign objects are in the blower air chamber or piping

Verify outdoor intake is free from dirt and protected by a strong screen or grille

Recheck blower leveling, drive alignment, and tightness of all mounting bolts

Adjust belt tension if belt drive is used

Turn drive shaft by hand to ensure impellers rotate freely

Ensure oil levels in the main oil sumps are correct

Is power available and are electrical overload devices installed and workable for electric motor?

Lubrication — How to properly determine the oil service intervals

Check ambient temperature and discharge temperature

Determine oil temperature increase

Select ISO Viscosity Grade based on conditions

Remove the breather plug (25) and the oil overflow plug (21)

Fill the reservoir up to the overflow hole

Ensure the reservoir is not overfilled

Place the breather and the overflow plug back into their respective holes