Greenheck Downblast Centrifugal Roof Exhaust GB-160HP

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 type for bushing and shaft key installation

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

Adjust belt tension after the first 24-48 hours of operation

Adjust and tighten belt as necessary

Check all fasteners and setscrews for tightness

Does the wheel rotate freely and is it aligned as shown in Figure 7?

Was the wheel position checked for movement during shipment?

Was the centering height alignment adjusted by loosening the set screws and moving the wheel?

Disconnect and secure all electrical power to the fan.

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

Are grease fittings provided on the motor?

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

Grease the motor according to the manufacturer’s recommendations.

Was the grease replaced after 2,000 hours of running time?

Ensure the fan is turned off and locked out for safety

Gather necessary tools and materials, including a hand grease gun and high-grade lithium base grease

Inspect the following before lubrication

Set hand grease gun to a maximum of 40 psi

Is the bearing in a hot, humid, or dirty location?

Rotate bearings during lubrication if safe to do so

Pump grease slowly until a slight bead forms around the seal