Howden Roots Air Blower URAI 76

Lubrication — How to properly determine the oil service intervals

Verify conditions for oil service intervals

Use Roots synthetic oil of correct viscosity per Table 2

Remove the oil overflow plug (21)

Fill the reservoir up to the overflow hole

Ensure the reservoir is not overfilled

Verify the following conditions for DVJ Blowers

Are there any visible abraded areas and scratches on the coated surfaces after running?

Ensure no attempt is made to measure clearances involving coated surfaces

Ensure clearance settings are made accurately only with uncoated parts

Was the cleaning of coated surfaces done using a clean, dry rag only?

Was any solvent or cleaner used on the coated surfaces?

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

Inspect restriction plug and metering orifice for proper function

Slowly force new lubricant into each drive end bearing housing until clean grease appears at relief fitting

Avoid using electric or pneumatic grease gun

Install a substantial screen of 16 mesh backed with hardware cloth at or near inlet connections

Make provisions to clean the screen of collected debris after a few hours of operation

Remove the screen when its usefulness has ended to prevent wire deterioration and potential damage

Stop the blower at the first opportunity to clean the temporary inlet protective screen

Check for debris collection on the screen

If no appreciable amount of debris has collected, remove the screen

Check the oil level in the oil sumps

Is the oil level within the acceptable range?

Is the blower operating in a very dusty location?