ENGINE AR-COMPLETE 1246741 - Caterpillar

(1) Torque for four plugs ... 11 3 N m (8 2 lb ft)(2) Torque for 12 bolts ... 45 N m (35 lb ft)Tightening Procedure For Spanner Nut
Measuring Rolling Torque
(A) Torque wrench. (B) Direction of pull. (C) Viewed standing here.1. Use a torque wrench as illustrated above to determine the rolling torque created by the seal and boot. A typical rolling torque value is 3.4 N m (30 lb in).2. Heat shaft bearing cone (3) in an oven to 135°C (275°F). Press in the shaft bearing cone until the rolling torque increases 1.7 to 2.3 N m (15 to 20 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 (4), lock tanged washer (5) and locknut (6).4. Tighten the locknut with a torque wrench to 306 N m (225 lb ft). Rotate the housing to seat the bearings.5. Recheck the rolling torque. The final reading should be 1.7 to 2.3 N m (15 to 42 lb in) greater than the value measure in Step (A).6. A final rolling torque of 5.0 to 5.7 N m (45 to 50 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.