DISC-FRICTION 2403669 - Caterpillar

(1) Torque needed to turn the differential to put a preload on the bearings ... 50 to 70 lb. in.(57.7 to 80.7 cm.kg)(2) Torque for the bolts that hold the bevel gear to the differential case ... 225 20 lb. ft.(31.1 2.8 mkg)(3) Gear clearance (backlash) between the bevel gear and bevel pinion ... .011 to .014 in.(0.28 to 0.36 mm)(4) Torque needed to turn the bevel pinion shaft to put a preload on the bearings ... 10 5 lb. in.(11.5 5.8 cm.kg)Bearing Adjustment For The Differential
1. Using an 8B7554 Puller (2) and a 9S7354 Wrench (3), find the torque needed to turn the differential. The correct torque should be 50 to 70 lb. in. (57.7 to 80.7 cm.kg).2. Tighten adjusting nut (1), on either side of the differential, to get the correct torque reading. After getting the correct torque reading be sure the bevel gear is in a position so there will be enough gear clearance (backlash) when the pinion shaft is installed.3. After the pinion shaft and housing have been installed, make an adjustment to the backlash.Backlash Adjustment
1. Put the differential, with axle centerline in a horizontal position, and the bevel gear in position as shown.2. Fasten a dial indicator to the differential carrier. Put the dial indicator in position so it is in contact with a bevel gear tooth and move the bevel gear forward and backward.
The backlash must be checked with bevel pinion shaft pushed toward centerline of bevel gear and held stationary.
3. Make a note of the difference in readings which is the amount of backlash on the dial indicator. Check the backlash at four different locations on the bevel gear, taking the lowest reading as the position to check the backlash. The correct backlash should be .011 to .014 in. (0.28 to 0.36 mm).If the reading is too great at the point of least backlash, loosen adjusting nut (2) and tighten adjusting nut (1) an equal amount. To increase backlash, loosen adjusting nut (1) and tighten adjusting nut (2) an equal amount.
Differential bearing preload is maintained only if bearing slack caused by loosening one adjusting nut is compensated for by tightening the other adjusting nut an equal amount.