Loren Cook Company Wall Exhauster ACRU 402

Identify motor service conditions and NEMA frame

Is the motor provided with prelubricated bearings?

Does the motor have provisions for relubrication?

Inspect motor bearings for signs of wear or damage

Clean motor bearings if necessary

Is the grease compatible with polyurea mineral oil NLGI #2?

Lubricate motor bearings with compatible grease if required

Ensure fan is operational before starting lubrication

Check for any specialized lubrication instructions on fan labels

Is the bearing visible during operation?

Pump grease slowly until a slight bead forms around the bearing seals

Non-visible Bearing Lubrication

Number of grease injections used (max 3)

Motor Bearings Inspection Overview

Ensure motor is turned off and locked out

Gather necessary tools and materials

Check the following components for wear and damage

Is the existing grease in good condition?

Add compatible grease if necessary

Is the fan in operation during lubrication?

Check lubrication intervals based on conditions

Pump grease slowly until a slight bead forms around the bearing seals

Number of grease injections used

Check for any signs of seal damage or contamination

Establish inspection schedule based on operating conditions and location

Contact local code authority for inspection requirements

Inspect bolts and setscrews for tightness

Inspect belt wear and alignment