TM  10-3930-643-34 GENERAL  SUPPORT  PROPELLER  AND  PROPELLER  SHAFTS  MAINTENANCE.  (cont) 16-3. Rear  Differential  Carrier  Assembly.  (Sheet  7  of  12) ASSEMBLY 31. 32. 33. 34. 35. 36. 37. 38. NOTE When replacing parts, gears must be replaced as a matching set. Washers must be replaced as a q atched set. Using an arbor press, install spacer (49) and cups (48 and 47) to cage (50). Install cone (46) and bearing (44) to gear (42). Using  retaining  ring  pliers,  install ring  (43). Using an arbor press, install gear (42) to cage (50). Install cone (45). Rotate cage to verify normal bearing contact. Apply load of 6 tons with press as shown. Using soft iron wire and scale indicator, measure bearing preload torque as shown. Bearing preload torque should be 5 to 15 in-lb. Be sure  to  measure  rotating  torque and not starting torque. Install  thinner spacer (49) to increase or thicker spacer to decrease preload,  as required. Go to sheet 8 16-25