980 WHEEL LOADER Every 1000 Service Hours Caterpillar

(30)Transmission

1. Oil should be warm before draining. Remove drain plug.

2. Remove breather and wash in clean kerosene.

3. Oil breather element lightly and install breather.

4. Install drain plug.

5. Change filter element and wash magnetic strainer. See item (21).

6. Fill compartment. Refill capacity on page 28.

7. Start engine and check oil level. Oil should be up to FULL mark on gauge.

(31)Front And Rear Differentials And Final Drives

1. Position wheels with drain plugs down. Remove plugs and allow oil to drain.

2. Remove front and rear differential drain plugs and allow oil to drain.

3. Clean and install differential drain plugs.

4. Clean and install front final drive drain plugs.

5. Remove front differential fill plug and add oil to level of plug opening. Refill capacity on page 28. Install fill plug.

6. Position rear wheels with OIL LEVEL mark horizontal.

7. Remove rear differential fill plug and add oil to level of check plug openings in final drive covers. Refill capacity on page 28. Install fill and check plugs.

8. Oil may be added through final drive covers to speed filling.

(32)Brake Camshafts

Lubricate 2 fittings on each front wheel.

Lubricate 1 fitting on each rear wheel.

(33)Drive Shaft Yokes And Universal Joints

Lubricate 1 fitting on front universal joint. Lubricate 1 fitting on front yoke until grease appears at relief valve.

Lubricate 1 fitting on each intermediate drive shaft universal joint.

Lubricate 1 fitting on each rear universal joint. Lubricate 1 fitting on rear yoke until grease appears at relief valve.