CONT GP- 5251490 - Caterpillar

Caterpillar recommends obtaining an oil sample and performing a SOS Oil Analysis at regular intervals to help prevent damage to components. Use the information in "Sampling Interval and Location of the Sampling Valve" in this OMM to find the proper sampling interval for your machine.
The final drive planetary is located at the rear of the track assembly. There are two final drives. One final drive is on each side of the machine.Perform this procedure for the final drive planetary on both sides of the machine.
Illustration 1 g00788311
Note: The final drive planetary has three plugs. Position the final drive with drain plug (1) at the top of the drive. Position the final drive with drain plug (3) at the bottom of the drive. Only use drain plug (2) to check the level of the oil in the drive.
Place a suitable container below drain plug (3) in order to capture the oil as the oil drains from the drive.
Remove drain plug (3) and allow the oil to drain.
Clean drain plug (3) and install the plug.
Remove drain plug (1). Fill the final drive planetary with 3.2 L (0.85 US gal) of 85W140 gear oil. Allow the machine to sit for 45 minutes.Note: The machine needs to sit for 45 minutes in order to fill the rear bearings of the final drive planetary. The failure to wait for 45 minutes may result in bearing failure.Note: Using drain plug (2) as an indication of proper oil level is not recommended for the filling procedure.
Clean drain plug (1) and install the plug.