LOCKNUT 2126559 - Caterpillar

1. Move the machine to put drain plug (2) in the position shown. Remove drain plug (2), and drain the oil from the final drive.2. Remove the bolts and cover assembly (1). Check the O-ring seal in the cover for wear or damage. If necessary, replace the seal. 3. Install a 1/2"-13 NC forged eyebolt (4) in the end of the axle as shown. If the axle cannot be removed, move the machine a small amount to the front or rear until the axle can be pulled from the differential and final drive.4. Remove axle (5) and sun gear (3) from the axle housing. 5. Use tool (A), and remove retainer ring (7) from the axle.6. Remove sun gear (3) and washer (6) from the axle.Install Axles (Front And Rear)
1. Make sure the axles are clean and free of dirt and foreign material.2. Put axle (1) in position in the axle housing. 3. Install washer (2) on the shaft. If gear (3) cannot be installed, move the wheel a small amount to the front or rear until the gear can be installed.4. Put gear (3) in position on the shaft and in the final drive.5. Use tool (A) to install retainer ring (4) that holds gear (3) in position on the axle. 6. If necessary, because of wear or damage, replace button (7) in cover (5).7. Turn the flat sides of three shafts (8) toward the outside as shown to give clearance for the counterbore in cover (5).
If the cover does not fit flat up against the final drive without force, remove the cover and repeat Step 7.
8. Put clean oil on O-ring seal (6), and install cover (5).9. Install the O-ring seal on plug (9), and install the plug in the final drive.10. Fill the final drives with oil to the correct level. See the Maintenance Guide.