BAR 9V8991 - Caterpillar

Start By:a. remove pump drive 1. Remove bolts (1) that hold bearing cage (2) to the housing.2. Install two 1/2" -13 NC forcing screws (3), and remove the bearing cage. 3. Remove shims (5) and O-ring seal (6) from the inside of cage (2). Inspect the seal, and make a replacement if needed.4. Remove bearing cup (4) from the cage if a replacement is necessary. 5. Remove bearing cones and gear assembly (7) from the housing. 6. Use tooling (A) to remove bearing cones (8) from each side of the gear if a replacement is necessary. 7. Remove six bolts (9) and the lockwashers that hold the bearing cage to the housing. 8. Install two 1/2" -13 NC forcing screws, and remove bearing cage (10). 9. Remove shims (13) and O-ring seal (12). Inspect the seal, and make a replacement as needed.10. Remove bearing cup (11) from the cage if a replacement is necessary. 11. Remove bearing cones and gear assembly (15). Remove bearing cone (14) from each side of the gear with tooling (A). 12. Remove yoke assembly (16) from the housing. 13. Remove the two bolts and lockwashers, and remove adapter (17). 14. Remove and inspect O-ring seal (18). Make a replacement of the seal if necessary. 15. Remove the bolts from shaft (19), and install two 1/2" -13 NC forcing screws. Remove the shaft from the gear and bearing assembly. 16. Remove ring (20) and bearing (21) from shaft (19). The bearing slides off the shaft with hand pressure. Remove O-ring seal (22), and inspect it. Make a replacement of the seal if necessary. 17. Remove gear (23) and the bearing after shaft (19) has been removed. 18. Remove bearing cups (24) from gear (23) if replacements are necessary. Remove ring (25) if a replacement is necessary. 19. Remove the bearing cup from the housing with tooling (B). 20. Inspect the lip-type seal (26) in the housing. Remove and make a replacement as needed. Remove bearing cup (27) if a replacement is needed.Assemble Pump Drive
1. Install the lip-type seal in the housing with tooling (A). Be sure the lip of the seal is toward the inside of the housing. 2. Turn the housing over. Lower the temperature of bearing cup (27). Use tooling (A) to install the bearing cup.3. Use tooling (A) to install the other bearing cup (not shown) in the housing. Lower the temperature of the bearing cup prior to installation. 4. Install ring (25) in gear (23).5. Lower the temperature of bearing cups (24). Use tooling (A) to install bearing cups (24) in gear (23). 6. Put gear (23) and bearing cone (28) in position in the housing. 7. Use the procedure that follows to adjust the preload on bearing cones (21) and (28):a. Install bearing cone (21) and ring (20) on shaft (19). Put the shaft (without shims and O-ring seal) in position in the housing and through gear (23) and bearing cone (28).b. Install four bolts (30). Tighten the bolts