637 TRACTOR-SCRAPER Every 1000 Service Hours Or 6 Months Caterpillar


Every 1000 Service Hours Or 6 Months
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1.1. (45)Tractor Transmission System - Change Oil, Wash Screens and Wash and Oil Breather
2.1. (46)Scraper Transmission System - Change Oil, Wash Screen and Wash and Oil Breather
3.1. (47)Tractor Differential And Final Drives - Change Oil
4.1. (48)Scraper Differential And Right Final Drive - Change Oil
5.1. (49)Scraper Left Final Drive - Change Oil

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

1. Remove transmission drain plug.

2. Remove oil sump drain plug.

3. Disconnect tube assembly and install new seal.

4. Remove screen and wash in clean kerosene.

5. Install screen and tube assembly.

6. Remove cover and screen. Install new seal.

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

8. Remove cover and element. Wash in kerosene and dry with pressure air. Lightly oil element and install.
9. Change filter element and wash magnetic strainer. (See items 31 and 42.)
10. Clean and install all drain plugs.
11. Fill transmission to FULL mark on gauge. (Refill capacity on page 54.)
12. Start engine and operate machine a few minutes.
13. Check oil level. Maintain oil level to FULL mark on gauge.

(46)Scraper Transmission System - Change Oil, Wash Screen and Wash and Oil Breather

1. Remove transmission tank filler cap.

2. Remove drain plugs.

3. Remove filler screen and wash in kerosene. Install screen.

4. Install new filler cap gasket. Install cap.
5. Change filter element and wash magnetic strainer. (See items 32 and 43.)
6. Clean and install all drain plugs.
7. Fill transmission to FULL mark on gauge. (Refill capacity on page 54.)
8. Start engine and operate machine a few minutes.
9. Stop engine.
10. Check oil level with machine on level ground.
11. Add oil if necessary.

(47)Tractor 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 54.)
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.

(48)Scraper Differential And Right Final Drive - Change Oil

1. Position right final drive with drain plug down.

2. Remove final drive drain plug. Drain oil.

3. Remove differential drain plug. Drain oil.

4. Clean and install drain plugs.

5. Remove right final drive fill plug.

6. Fill to level of plug opening.

7. Clean and install fill plug.

8. Remove differential filler cap.

9. Fill differential. (Refill capacity for differential and right final drive on page 54.)

10. Install cap.

11. Check oil level.

12. Oil level should be up to FULL mark on gauge. Add oil if necessary.

(49)Scraper Left Final Drive - Change Oil

1. Position wheel so drain plug is down.

2. Remove drain plug. Drain oil.

3. Clean and install drain plug.

4. Remove fill plug.

5. Fill to level of plug opening. (Refill capacity on page 54.)

6. Clean and install plug.