Howden Roots Air Blower URAI 42

Check the oil level in the oil sump

Is the oil level at the correct position in the sight gauge?

Record any observed leaks or issues

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

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

Ensure hydraulic pressure relief fittings are in place to vent excess grease

Check restriction plug and metering orifice for proper function

Use a manual pressure gun to lubricate bearings

Lubrication for Units with Grease Lubricated Drive End

Check applicable speed and operating hours

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

Ensure hydraulic pressure relief fittings are in place to vent excess grease

Check restriction plug and metering orifice for proper function

Slowly force new lubricant into each drive end bearing housing until traces of clean grease come out of the relief fitting

Avoid using electric or pneumatic grease gun

Technical supplement for URAI-G Gas blowers — Precaution

Use caution when opening the head plate seal vent chamber plugs (43)

Check for gas leakage through the mechanical seals

Purge each seal chamber with an inert gas if gas leakage is undesirable

Check for gear end oil and drive end grease leakage into the gas stream

Verify compatibility of gases with blower materials

Contact factory if there are questions regarding application or operation

Remove mounting strains by loosening blower mounting bolts

Reset leveling and drive alignment

Ensure all piping meets blower connections accurately and squarely

Disconnect piping to clean blower interior thoroughly