CHASSIS 1078837 - Caterpillar

Start By:a. remove pump drive1. Remove the plug from the cover and drain the oil from the pump drive.
Typical Example2. Remove bolt (1) and retainer and spring (2). 3. Use tooling (A) and loosen spider (3) and the flange from the splines on the input gear. Remove spider (3) and flange from the input gear. 4. Remove rubber blocks (4) from spider (3).5. Remove bolts (5) that hold spider (3) to flange (6). Remove spider (3) from the flange. 6. Fasten to a hoist and turn the pump drive over in the position shown.7. Remove bolts (8) and bolt and spacer (7). Remove tube assembly (9) and the oil level gauge assembly from the cover.8. Remove the bolts that hold outer bearing cages (10) in position. 9. Install two 1/2" -13 NC forcing screws and tighten them evenly to loosen cages (10) from the pump drive cover. Remove cages (10) and shims (11) from the cover. Keep the shims and cages together for installation purposes. 10. Using tooling (B), remove the bearing cups from outer cages (10).11. Remove O-ring seals (12) from cages (10). 12. Remove the bolts that hold cage (13) in position and install two 5/8" -11 NC forcing screws in the cage. Tighten the forcing screws evenly to loosen cage (13) from the cover. Remove cage (13) and shims (14) from the cover. Keep the shims and cage together for installation purposes. 13. Remove lip type seal (15) from cage (13). 14. Use tooling (C) to remove the bearing cup from cage (13).15. Remove the O-ring seal (16) from cage (13). 16. Remove the bolts that hold cover (17) to case (18). Install two 1/2" -13 NC forged eyebolts and fasten a hoist to the cover as shown.17. Use two 3/8" -16 NC forcing screws to loosen cover (17) from case (18). Remove the cover from the case. The weight of cover (17) is 50 kg (110 lb). 18. Remove gears (19) and gear (20) from the case. 19. Remove the bearing cones from each end of the gears (19) with tooling (D). 20. Use tooling (E) to remove the bearing cone from the end of gear (20) that is shown.21. Use tooling (D) to remove the bearing cone from the opposite end of gear (20). 22. Use tooling (C) to remove the three bearing cups from case (18). If necessary, remove fittings (21) from case (18). 23. Fasten to a hoist and turn case (18) over. Remove lip-type seal (22) from the case.Assemble Pump Drive
1. Thoroughly clean all parts to be used again. Make sure the old gasket material is removed from the contact surfaces of the cover and case. 2. Using tooling (F), install the seal in the case. Make sure the lip of the seal is toward the inside as shown. Put clean oil on the lip of the seal. 3. Fasten to a hoist and turn the case over. Install fittings (21) in the case.4. Lower the temperature of the three