Greenheck Exhaust Fan CUBE 121

Disconnect and secure all electrical power to the fan

Ensure the unit is non-functional (fuses removed, disconnect locked off)

Check for unusual environmental conditions (extreme temperature, moisture, contaminants)

Select lubrication interval based on conditions

Ensure grease fittings are wiped clean

Is the unit in operation while lubricating bearings?

Inspect fan operation for any unusual noise or vibration

Is the fan operating within the expected parameters?

Adjust and tighten belt as necessary

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.

Socket Head Cap Screws Installation

Standard Mounting: Install the two socket head cap screws into the visibly threaded holes on the wheel hub.

Reverse Mounting: Install the two socket head cap screws into the visibly threaded holes of the bushing flange.

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

Disconnect and secure all electrical power to the fan.

Ensure the unit is made non-functional (fuses removed, disconnect locked off).

Ensure power is turned off to the fan.

Remove hood to gain access to motor compartment by pushing in two adjacent snap buttons and lifting.

Disconnect motor wiring and controls wiring (if present).

Remove the screws securing the powerpack in place.

Carefully lift out the powerpack while keeping the powerpack assembly centered to the housing.

Disconnect all electrical power to the fan and secure to the 'off' position

Make the unit non-functional by removing fuses and locking off the disconnect

Reinstall fuses and unlock the disconnect

Is the fan operating normally after reactivation?