BOLT-HEX HEAD 4389255 - Caterpillar

Image1.3.1
Image1.3.2
Remove the fan adapter and spacer.
Support the fan pulley and remove.
Image1.4.1
Image1.4.2
Image1.4.3
Remove the bolt securing the plate to the shaft.
Remove the plate.
Image1.5.1
Remove the remaining fan hub assembly from the shaft and move it to a work space to remove the bearings. Leave the rear spacer on the fan shaft. Image 1.6.2
Image1.6.1
Image1.6.2
Parts Required
2 333-2408 Ball Bearings
Carefully remove both bearings and retain the spacer located in between both bearings.
Begin by installing the bearing located closest to the fan with a bearing driver and mallet. Make sure that the bearing is properly seated. Turn the hub assembly over and insert the spacer.
CAUTION: Install the spacer that is located in between the two bearings before installing the second bearing.
Install the rear bearing with the red seal facing outwards. Verify that the spacer is centered. Seat the bearing properly.
Image1.7.1
Image1.7.2
Image1.7.3
Install the fan hub assembly back onto the fan shaft. Install the shaft plate and apply thread locker to threads on the 1/2-13 center shaft bolt. Tighten to 115 +/- 5 Nm
Image1.8.1
Parts Required
1 346-4803 Fan Pulley
1 310-2199 Belt Set
Install new fan pulley 346-4803 with existing hub, spacer and fan adapter. Tighten each nut holding the fan adapter to 35 +/-5 Nm.
Image1.9.1
Image1.9.2
Image1.9.3
Ensure the end of the tensioning bolt is seated in the correct location.
Install the belt set
Tension belts to 180 +/- 10 lbs (refer to Specifications, "Belt Tension Chart")
Tighten fan bracket nuts to 65 +/- 10 Nm. Image 1.10.1
Note: Since matched set of belts are being used, please check the tension of all the belts in order to verify that the lowest belt is in the acceptable tolerance range.
Reinstall fan
Reassemble fan and belt guards
Since new belts are being installed run the engine for 30 mins. at rated speed with no load.
CAUTION: Allow belts to cool down before verifying belt tension.
Check the belt tension again on each belt. Verify that the lowest belt is in the acceptable tolerance range. Retighten if necessary.
Image1.10.1
Image1.10.2
Image1.10.3
The Rental Power Module can now be returned to service.