COMPRESSOR-YM 4489150 - Caterpillar

3. Remove O-ring seal (5) from cage (6). Remove spiral snap ring (8) from flange (1).4. Use Tooling (A) and a press, and remove flange (1) from cage (6). If necessary, remove plug (7) from the flange.5. Use Tooling (B), and remove the bearing and lip-type seal from cage (6).
Put identification marks on the pump gears. If the pump gears are used, they should be installed into their original position.
6. Turn the pump over and support it with wood blocks as shown.7. Remove the four O-ring seals and four bolts (10) from cover (9). Remove the cover. Turn cover (9) over, and remove the two O-ring seals. 8. Remove two gears (12). Remove the key from gear assembly (11).9. Remove the two O-ring seals and body assembly (13). Turn body assembly (13) over and remove three O-ring seals and the two dowels. 10. Remove two gears (14). Remove the key from gear assembly (11).11. Remove body assembly (15). Turn body assembly (15) over, and remove the O-ring seal. Use Tooling (B), and remove the two bearings. 12. Remove gear assembly (16). 13. Turn the pump over, and support it with wood blocks as shown. Remove cover assembly (17).14. Turn cover assembly (17) over, and remove the O-ring seal. Use Tooling (B), and remove the two bearings. 15. Remove two gears (18) and (19). Remove the key from gear assembly (11).16. Remove body assembly (20) and gear assembly (11) from body assembly (21).17. Turn body assembly (20) over, and remove the O-ring seal. Use Tooling (B), and remove the O-ring seal. Use Tooling (B), and remove the bearings.18. Remove the dowels from body assemblies (20) and (21).Assemble Power Train Oil Pump
1. Make sure all parts are clean and free of foreign material. Inspect all parts for wear or damage, and replace if necessary. Put clean oil on all parts at assembly. 2. Install four dowels (2) two on each side, in body assembly (1). The dowels should be 5.0 0.5 mm (.200 .020 in) above the surface of the body assembly (1).
Install bearings (4) with the joint in both bearings in the correct location in the body assembly. The location of the joint is at an angle 30° 15° from the centerline of the two bearing bores in the direction of the groove on the pressure side of the pump.
3. Use Tooling (A) and a press, and install two bearings (4) into the body assembly. The bearings must be 1.5 0.25 mm (.059 .020 in) below the surface of the body.4. Install the O-ring seal on the body assembly. 5. Position body assembly (1) on wood blocks as shown. Align the dowels, and put body assembly (6) in position on body assembly (1).6. Install two dowels (9) into body assembly (6). The dowels should be 5.0 0.5 mm (.200 .020 in) above the surface of the body assembly (6).7. Install gear assembly (7) into the body assemblies with the splined end