Howden Roots Air Blower URAI 59

Lubrication — For Units with grease lubricated drive end

Verify 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

Check lubrication system on drive shaft end bearings

Ensure hydraulic pressure relief fittings are in place

Verify restriction plug and metering orifice are functioning

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

Lubrication — For Units with grease lubricated drive end

Verify applicable conditions for lubrication

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

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 — 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

Confirm that lithium based grease is not used for any Roots blowers

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

Check for rubbing between impeller and casing

Observe surfaces for spot heating

Inspect for sudden bearing failure

Verify correct lubrication of timing gear

Check oil level for churning and excessive heating

Measure temperature at the bottom of the gear housing

Inspect for loss of tooth-clearance and backlash

Check for rapid wear of the gear teeth

Coat internals of cylinder, gearbox and drive end bearing reservoir with Nox-Rust VCI-10 or equivalent

Paint shaft extension, inlet and discharge flanges, and all other exposed surfaces with Nox-Rust X-110 or equivalent

Seal inlet, discharge, and vent openings

Storage and Vibration Protection

Protect units from excessive vibration during storage

Rotate shaft three or four revolutions every two weeks

Remove flange covers on both inlet and discharge and inspect internals to ensure absence of rust