HEAD 9J3626 - Caterpillar

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products.Dispose of all fluids according to local regulations and mandates.
Operate the machine until the differential oil is warm. Park the machine on a level surface.
Illustration 1 g01125937
Slowly move the machine until plug (1) is at the lowest point on the rear left final drive. Engage the parking brake and shut off the engine.
Wipe the area around plug (1) on the final drive. Remove plug (1). Remove the plug slowly in order to gradually release any system pressure. Allow the oil to drain into a suitable container.
Clean plug (1) and inspect the O-ring seal for damage. Lubricate the O-ring seal with gear oil and install the plug. Note: The plug is magnetic. Check the plug for ferrous particles that may indicate wear of the differential and final drive components.
Start the engine and disengage the parking brake.
Repeat Step 2 through Step 4 for the rear right final drive.
Illustration 2 g03486480
Remove drain plug (2) and level plug (3) from the rear axle. Remove the drain plug slowly in order to gradually release any system pressure. Allow the oil to drain into a suitable container.
Clean the drain plug and inspect the O-ring seal for damage. Lubricate the O-ring seal with gear oil and install the drain plug. Note: The drain plug is magnetic. Check the plug for ferrous particles that may indicate wear of the differential and final drive components.
Start the engine and disengage the parking brake.
Illustration 3 g01125942
Slowly move the machine until "Oil Level" mark (4) on the rear right final drive is horizontal. Engage the parking brake and shut off the engine.
Remove plug (1) from the front right final drive and add oil to the final drive. Refer to Operation and Maintenance Manual, "Capacities (Refill)" and Operation and Maintenance Manual, "Lubricant Viscosities". Fill the final drive to the bottom of the plug hole. Allow the oil to flow along the axle housing and settle at a common level.
Install plug (1).
Repeat steps 9 through 12 for the rear left final drive.
Remove level plug (3) from the rear axle. Add oil to the differential until the differential is full. Refer to Operation and Maintenance Manual, "Capacities (Refill)" and Operation and Maintenance Manual, "Lubricant Viscosities".
Install the plug.
Repeat the procedure for the center differential and final drives. Repeat the procedure for the front differential and final drives.
Start the engine.
Operate the machine for a few minutes in order to circulate the oil.
Shut off the engine.
Check the oil level of the differential and final drives. Refer to Operation and Maintenance Manual, "Differential and Final Drive Oil Level - Check".