SPROCKET 6S3189 - Caterpillar

Illustration 1. New parts location. Procedure To Rework The Axle Housings To Accept 106-9612 Dowel.
Reworking axle housings to utilize a ball to keep the bearing cones from rotating is NOlonger recommended. When installing the cone anti-rotation system, the axle housing bearing journal maximum wear limit is 0.102 mm (.0040 in) diameter. SEBF8083-02, see "Reference", allows an axle housing diameter wear limit for re-use of 0.20 mm (.008 in). This is NOTacceptable with the cone anti-rotation system. Dimension "H" for the machines in this article is 5.0 mm (.20 in) less than was previously recommended. This dimension moves the inner axle housing slot 5.0 mm (.20 in) toward the machine center line and matches current production dimensions. This dimension requires the use of new part number seal retainers and 106-9612 Dowel.
Illustration 2. Slot end view. Section through slot in axle housing bearing race. Inner and outer slot end view dimensions are the same.
Illustration 3. Axle housing outer race.
Illustration 4. Axle housing inner race.
Illustration 5. Outer bearing cone slot profile.
Illustration 6. Inner bearing cone slot profile. Dimension "F" is the dimension from the end of the axle housing to the outer dowel slot. Dimension "G" is the outer diameter of the axle housing. Dimension "H" is the dimension over a properly installed outer dowel. Dimension "J" is from the axle housing seal retainer flange to the inner dowel slot. Dimension "K" is the length of the inner dowel slot. Dimension "L" is the dimension over a properly installed inner dowel. Dimension "M" is the inner diameter of the axle housing.Machine slots in the axle housing using the dimensions shown in Chart 5 and Illustration 1. The slot should be placed on the same centerline as the threaded hole for the AETA pickup.
The cone slot must be machined with a blunt end mill cutter or equivalent to be compatible with the dowel/cone anti-rotation system.
To avoid heat distortion of cone race, use slow feeds and speeds.Use Illustrations 5 and 6 to identify the correct bearing cone slot profile. If the profile of the slot is not correct, it can be modified according to the dimensions in Illustrations 5 and 6. Dimension "M" must be maintained.
Procedure to Rework The Axle Housing To Accept Undersize Bearings.
Illustration 7. Outer axle outer race dimensions for undersize bearings. Dimension "Q" is over the axle housing dowel projection dimension of a properly installed outer dowel on an undersize outer bearing journal. Dimension "R" is the undersize bearing cone outer bearing journal diameter.Illustration 7 shows the dimensions for an undersize axle housing. Also see Illustrations 1,4 and 5.