Howden Roots Air Blower URAI 65

Lubrication — How to properly determine the oil service intervals

Check ambient temperature and discharge temperature

Determine oil viscosity grade based on temperature

Verify oil temperature does not exceed 195°F (90°C)

Use Roots synthetic oil of correct viscosity per Table 2

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

Lubrication — For Units with grease lubricated drive end

Verify the following conditions

Use specified NLGI #2 premium grade aluminium complex grease, Roots P/N T20019002

Ensure no lithium based grease is used

Technical supplement for URAI-G Gas blowers — Lubrication

Check hydraulic pressure relief fittings for proper venting

Ensure restriction plug and metering orifice are in place

Use a manual pressure gun to slowly force new lubricant into each drive end bearing housing

Confirm traces of clean grease come out of the relief fitting

Lubrication — How to properly determine the oil service intervals

Determine the oil service intervals based on conditions

Select the correct oil viscosity grade based on conditions

Use Roots synthetic oil of correct viscosity per Table 2

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

Installation — Belt Driven units

Adjust belt tension according to manufacturer's instructions

Ensure tension prevents slippage under load

Check for excessive tightening to avoid bearing or shaft issues

Periodically check belt tension

Inspect belts for fraying or cracks

Rotate drive shaft by hand after piping completion and before applying power

Check for uniform freedom of drive shaft movement

Investigate issues if drive shaft does not move freely

Check lubricant levels in the gearbox and bearing reservoirs weekly

Follow manufacturer's instructions for driver lubrication practices

Check and grease the coupling if direct connected to the blower each time blower oil is changed

Check belt tension periodically and inspect for frayed or cracked belts in a belted drive system

Observe oil levels at reasonable intervals during the final run

Did excessive noise or local heating develop during operation?

Did pressure rise or temperature rise across the blower exceed the specified limit?

Make periodic checks during the first few days to ensure conditions remain steady or acceptable