Greenheck Centrifugal Sidewall Exhaust Fan CWB-121

Disconnect and secure all electrical power to the fan.

Ensure the unit is non-functional by removing fuses and locking off the disconnect.

Are you a qualified personnel familiar with local codes and regulations?

Are grease fittings provided on the motor?

Record the current motor temperature.

Is the motor temperature below 104ºF (40ºC)?

Lubrication Frequency Assessment

Select the type of service environment

Ensure the use of a good quality lithium base grease, conforming to NLGI Grade 2 consistency

Is the lubrication process completed successfully?

Check for any unusual noise or vibration after lubrication

Describe any issues observed during lubrication

Inspection and Maintenance Record

Record inspection and maintenance performed

Check for moisture or dirt accumulations on parts

Describe the source of moisture or dirt if found

Ensure the fan is in operation before starting lubrication

Wipe grease fittings clean to prevent contamination

Is the bearing equipped with special bearings for hot, humid, or dirty locations?

Enter the number of lubricant shots applied (1 or 2 recommended)

Enter the hand gun pressure used (maximum 40 psi)

Rotate bearings during lubrication if safe to do so

Loosen the setscrew holding the bushing and shaft key in place, if present.

Loosen and remove the socket head cap screws fastening the bushing to the hub.

Select the mounting type for socket head cap screws installation

Tighten the socket head cap screws an eighth of a turn at a time, alternating until the hub comes loose from the bushing.

Clean all surfaces of hub and bushing to remove any oil or residue.

Select the mounting style and perform the corresponding actions

Use the keyway setscrew to hold the shaft key and bushing in place, if present, without overtightening.