ENGINE AR-COMPLETE 1213443 - Caterpillar

Gearbox Components
(1) Seal. (2) Boot. (3) Bearing cone. (4) Bearing cone. (5) Washer. (6) Lock tanged washer. (7) Locknut. (8) Spindle. (9) Hub. (10) Bolts. (11) Shoulder bolts.Tightening Procedure For Gearbox Spanner Nut
Measuring Rolling Torque
(A) Torque wrench. (B) Direction of pull. (C) Viewed standing here.1. Install seal (1), boot (2), and bearing cone (3) in hub (9). Install spindle (8) into hub (9). Hold the spindle stationary and use a torque wrench as illustrated above to determine the rolling torque created by the seal and boot. A typical rolling torque is 3.4 N m (30 lb in). Bearing cones (3) and (4) should be clean and wiped dry of any lubricating oil. Bearing cones which have oil present will affect rolling torque readings.2. Heat shaft bearing cone (4) in an oven to 135°C (275°F). Press in the shaft bearing cone until the rolling torque increases 1.7 to 4.5 N m (15 to 40 lb in) greater than the value measure in Step (1). It will be necessary to continually rotate the housing to seat the bearing cone in order to obtain a correct rolling resistance.3. Apply 9S3263 Thread Lock to the threads of the locknut. Install washer (5), lock tanged washer (6) and locknut (7).4. Tighten the locknut with a torque wrench to 306 N m (225 lb ft). Rotate hub (9) to seat the bearings.5. Recheck the rolling torque. The final reading should be 1.7 to 4.5 N m (15 to 40 lb in) greater than the value measure in Step (1).6. A final rolling torque of 5 to 7 N m (45 to 65 lb in) should result in a bearing preload of .025 to .051 mm (.0010 to .0020 in).7. If the lockwasher tang does not line up with the locknut slot, tighten the locknut to line up the tang and bend into the locknut slot.Tighten eight bolts (10) to a torque of ... 20 to 25 N m (15 to 20 lb ft) Four shoulder bolts (11) are equally spaced.Tighten four shoulder bolts (11) to torque of ... 20 to 25 N m (15 to 20 lb ft)