650 & 660 TRACTOR-SCRAPER Every 1000 Service Hours Caterpillar

(37)Transmission System - Change Oil, Wash Screens and Wash and Oil Breather

1. Remove transmission drain plug.

2. Remove oil sump drain plug.

3. Remove transfer gear case drain plug.

4. Do items 28 and 34.

5. Remove tube and inspect seal. Use new seal if necessary.

6. Remove screen and wash in kerosene. Install screen and tube.

7. Remove cover and screen. Inspect seal. Use new seal if necessary.

8. Remove screen and wash in kerosene. Install screen on cover (do not crush screen) and install cover.

9. Remove cover and element. Wash in kerosene and dry with pressure air. Lightly oil element and install.

10. Clean and install all drain plugs.

11. Fill transmission to FULL mark on gauge. (Refill capacity on page 31.)

12. Start engine and operate machine a few minutes.

13. Check oil level and add oil if necessary to FULL mark on gauge.

(38)Differential And Final Drives - Change Oil

1. Position final drive drain plugs down.

2. Remove both final drive drain plugs and drain oil.

3. Remove differential drain plug and drain oil.

4. Clean and install drain plugs. Remove final drive fill plugs.

5. Fill final drives to level of plug openings. Clean and install fill plugs.

6. Remove differential fill cap. Fill differential to FULL mark on gauge. (Refill capacity on page 31).

7. Clean and install fill cap.

8. Start engine and operate machine on level ground a few minutes.

9. Check oil level. Oil should be to FULL mark on gauge. Add oil if necessary.