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BASE & OIL 7B0231 - Caterpillar

7B0231 BASE & OIL Caterpillar parts BASE
Alternative (cross code) number:
Caterpillar 7B0231 BASE & OIL

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Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact the skin.
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, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Park the machine on a level surface and stop the engine. Make sure that the transmission control is in the PARK position.
Illustration 1 g01208051
Remove the filler cap (1) in order to prevent a vacuum in the transmission tank. Install the filler cap after the transmission tank is drained. This will prevent dirt from entering the system.
Remove the retaining ring of the transmission filler screen.
Remove the screen. Wash the filler cap and the screen in clean, nonflammable solvent. Allow the cap and the screen to dry.
Inspect the seal. Use a new seal if the used seal is damaged.
Install the filler screen and the retaining ring.
Remove drain valve plug (4) in the transmission tank. Install a 100 mm (4.0 inch) long NPT pipe nipple in order to open the internal drain valve. The outer diameter of the NPT pipe nipple should be 25 mm (1.0 inch). Drain the oil into a suitable container.Note: Hand tighten the NPT pipe nipple. Do not use tools.
Remove the pipe nipple and install the drain plug.
Illustration 2 g01208125
Remove drain plugs (5) from the transmission housing. Drain the oil into a suitable container. Clean the drain plug and install drain plugs.
Fill the transmission tank. Refer to Operation and Maintenance Manual, "Lubricant Viscosities". Refer to Operation and Maintenance Manual, "Capacities (Refill)".
Illustration 3 g01208184
The engine shutdown switch is located above the left side of the front bumper.
Use engine shutdown switch (6) to prevent the engine from starting. Crank the engine for approximately 15 seconds. The oil level will decrease as oil fills the system.
Add more oil to the transmission tank in order to raise the oil level within the green range of lower sight gauge (3) .
Repeat Step 11 and Step 12 until the oil level stabilizes within the green range of the lower sight gauge.
Move the engine shutdown switch to the down position. Start the engine and operate the engine at low idle. Check for leaks and make necessary repairs.
Install the filler cap.
Observe the oil level when the oil is warm and the transmission control is in the PARK position. Maintain the oil level within the green range of upper sight gauge (2) .
Stop the engine. If necessary, add oil.
Failure to properly fill the transmission tank after an oil change may cause damage to the transmission clutches. Follow the procedure that is described above.

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