WASHER 0826804 - Caterpillar

48. Remove gear (86) from the main pump housing. Sliding the gear to the center of the housing, and remove it out the top. 49. Remove race (87) and bearing (88) from the main pump housing. The race and bearing are slip fits. The following steps are for the assembly of the main hydraulic pump.50. Be sure all parts of the main hydraulic pump are thoroughly clean and free of dirt and debris. Check the condition of all O-ring seals, back-up rings, and gaskets. If any of these compartments are worn or damaged, use new parts for replacement. Put clean hydraulic oil on all parts during assembly. 51. Install bearing (88) in its original position in the main pump housing. The bearing is a slip fit. Install race (87) in bearing (88).52. Heat gear (86) to a maximum temperature of 85°C (185°F). Lower the temperature of the shaft to -40°C (-40°F). Place the preheated gear in the main pump housing, above the bearing. Install the cooled shaft, with the attached race, through the gear and into the lower bearing. Note that the shaft has a woodruff key and the gear has a corresponding slot. Install the upper bearing on the shaft. It is a slip fit. 53. Install three O-ring seals (65) in plate (64). 54. Install plate (64) in the main pump housing. 55. Install seal (62) and two O-ring seals (63) in the gear pump.56. Install coupling (61) on the drive shaft of the gear pump. 57. Put gear pump (60) in position in the main pump housing. Install two socket head bolts (59) that hold it. 58. Assemble both pump rotating groups for the main hydraulic pump as in Steps 59 through 62.59. Heat bearing (85), spacer (84) and bearing (83) to a maximum temperature of 100°C (212°F). Install the bearings and spacer on the shaft as shown.60. Install shims (82) so the distance between the top of the shim pack to the bottom of the lower bearing [dimension (X) is 86.50 + 0.00 - 0.05 mm (3.40 + 0.00 - 0.002 in)].61. Heat bearing (81) to a maximum temperature of 100°C (212°F). Install the bearing on the shaft as shown.62. Put 9S3263 Thread Lock on the threads of the shaft of the pump rotating group. Install spanner nut (80). For the correct bearing preload, turn the pump rotating group while tightening spanner nut (80). The shaft running torque should be approximately 1 to 2 N m (1 to 1.4 lb ft). 63. Lower the temperature of the upper and lower rotating groups to a temperature of -40°C (-40°F). Install the upper and lower rotating pump groups in their original locations in the main pump housing. Be sure the timing marks on each pump rotating group are in alignment with each other as shown. 64. Install O-ring seal (70) in the main pump housing. 65. Install seal (69) in cover (68). Install the seal with the lip facing toward the inside of the pump housing