PLATE-WEAR 3626324 - Caterpillar

Gearbox Components
(1) Seal. (2) Boot. (3) Bearing cone. (4) Bearing cone. (5) Washer. (6) Lock tanged washer. (7) Locknut. (8) Bolts. (9) Spindle. (10) Hub.Tightening Procedure For Drum Support Housing 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 (10). Install spindle (9) into hub (10). 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 affects the 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 measured in Step 1. It is necessary to continually rotate the housing to seat the bearing cone in order to obtain a correct rolling resistance.3. Apply 9S-3263 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 (10) 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 measured in Step 1.6. A final rolling torque of 5 to 7 N m (45 to 62 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 12 bolts (8) to a torque of ... 20 to 25 N m (15 to 20 lb ft)