D8T Track-Type Tractor Power Train System Oil And Screens - Change/Clean Caterpillar


Power Train System Oil And Screens - Change/Clean
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D8T Track-Type Tractor [SEBU9417]
POWER TRAIN
FILTER GP
D8T Track-Type Tractor Power Train Oil Filter - Replace
D8T Track-Type Tractor Power Train System Oil And Screens - Change/Clean
1.1. Drain the Oil and Change the Transmission Oil Filter Elements
2.1. Clean Screens
3.1. Fill With Oil

------ WARNING! ------

At operating temperature, the power train tank is hot and under pressure.

Hot oil and components can cause personal injury. Do not allow hot oil or components to contact skin.

Remove the filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand. Remove the filler cap slowly to relieve pressure.



NOTICE

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, PERJ1017, "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.


Note: The correct oil grade that is in the transmission must be selected in the display. If the oil grade is changed, a diagnostic code will be present until a successful fill calibration is competed. Refer to Operation and Maintenance Manual, "Monitoring System - Service Feature" and Troubleshooting Guide manual for more information. Contact your Cat dealer if more information is needed.

Drain the Oil and Change the Transmission Oil Filter Elements

Operate the machine to warm the power train oil. The machine must be level. Lower the attachments with slight down pressure.

See the Operation and Maintenance Manual, "Power Train Oil Filter - Replace" in this manual for the procedure to change the filters.



Illustration 1g02280098

Open the left engine compartment to locate the high-speed oil change arrangement.

Use a 126-7538 Nozzle if the machine is equipped with the high-speed oil change arrangement. This arrangement removes oil from the sump in the bevel gear case. The high-speed oil change does not remove oil from the torque converter or from the transmission case.



    Illustration 2g00484767

  1. Remove the plug from the drain in the bevel gear case. Install a 4C-8563 Swivel into the valve. Clamp a hose to the swivel. A 25.4 mm (1 inch) pipe and hose can be used. Use a 25.4 mm (1 inch) pipe with 1-11 1/2 NPTF threads. Do not tighten the pipe.

  2. Turn the swivel or pipe clockwise to open the internal drain valve. Allow the oil to drain into a suitable container.

  3. Remove the rear bottom guard.


    Illustration 3g06601005

  4. Remove plug (2) from the drain valve in the torque converter. Install a 12.7 mm (.5 inch) pipe into the drain valve. Use a 12.7 mm (0.50 inch) pipe with 1/2-14 NPTF threads.

  5. Clamp a hose to the pipe to drain the oil into a suitable container.

  6. Open drain valve (1) and drain the oil into a suitable container.


    Illustration 4g06601008

  7. Remove the access cover (3) to the drain for the transmission (not shown). Remove plug (6) in the guard for access to the drain valve.

  8. Remove plug (5) from the drain valve in the transmission. Install a 12.7 mm (.5 inch) pipe into the transmission valve. Use a 12.7 mm (0.50 inch) pipe with 1/2-14 NPTF threads. Clamp a hose to the pipe to drain the oil into a suitable container.

  9. Open drain valve (4) and drain the oil into a suitable container.

  10. Change the filter element. See the Topic “Power Train Oil Filter - Replace” in this manual.

  11. Close the drain valve in the torque converter. Close the drain valve in the transmission case.

  12. Remove the hoses and remove the pipes from the drains.

  13. Remove the swivel or remove the pipe from the drain in the bevel gear case. The drain valve will close.

  14. Clean the oil drain plugs and install the oil drain plugs.

Clean Screens

Screens should be removed and cleaned when the oil is drained. Drain the oil into a suitable container before removing any screen.



    Illustration 5g06601019

  1. Remove torque converter scavenge line (7). Remove the screen.


    Illustration 6g06601023

  2. Remove transmission scavenge screen cover (8). Remove the screen.


    Illustration 7g06255695

  3. Remove the suction line for the power train oil pump. Remove screen (9) from the front wall of the bevel gear case.

  4. Clean three screens in clean, nonflammable solvent.

  5. Install the screens. Install the covers.

Fill With Oil

  1. Open the access door for the filler cap and the dipstick. The filler cap is on the right side of the machine next to the hydraulic oil tank.


    Illustration 8g06255697

  2. Remove oil fill cap and dipstick (10).

  3. Fill the bevel gear case with oil. See Operation and Maintenance Manual, "Capacities (Refill)".

  4. Always measure the oil with the dipstick (10).

  5. Maintain the oil level within the "FULL" and "ADD" marks on the dipstick. The engine should be running at low idle. The power train should be at operating temperature. See Operation and Maintenance Manual, "Power Train System Oil Level - Check" for more information.

  6. Clean oil filler cap and dipstick (10). Install the oil filler cap and the dipstick.

  7. Install the rear bottom guard.

For additional information about transmission system oil, see Special Publication, SEBU6250, "AVSpare Machine Fluids Recommendations" or consult your Cat dealer.

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