Fan Hub

FAN HUB - REPLACEMENT





Preparatory Steps:
^ Remove the fan.
^ Remove the drive belt. Remove the fan pulley.





Remove the four capscrews and replace the fan hub.

Torque Value: 24 N-m [18 ft lbs]

FAN HUB - INSPECTION





Preparatory Steps:
^ Remove the fan assembly
^ Remove the drive belt
^ Remove the fan hub





Check the end of the bearing for evidence that the lubrication has leaked between fan mounting hub and bearing housing.

FAN HUB - DISASSEMBLY





Secure the fan hub and remove the center capscrew and washer.





Support the bearing housing with a bearing splitter between the bearing and the fan mounting hub. Push the shaft out with a 1 3/8 inch diameter push pin.

NOTE: Approximately 6 tons of pressure is required.





Support the bearing housing and push the bearing out using a tool of suitable diameter to press on the outer race of the bearing. A 4-inch section of black pipe with 2 3/8 Inch O.D. will work well. Make sure the ends of the pipe section are exactly perpendicular to the length.

FAN HUB - ASSEMBLY





Clean all parts thoroughly in solvent and dry with compressed air.





Support housing in press. Press a new bearing in from the front side with a flat plate over the bearing.

Push it flush with the front of the housing.





Support the inner race of the bearing from the bottom and press the fan mounting hub into the bearing from the front side. Press the hub until the hub shoulder contacts the inner race (1).





Install the retaining washer and capscrew.

Torque Value: 77 N-m [57 ft-lbs]