STABILIZER AR 1127175 - Caterpillar

For complete installation and adjustment procedures for pinion bearing preload, differential bearing preload, ring gear tooth contact, backlash, and rotational torque checks for pinion bearing and differential nest, see the RR-250 and SS-250 Power Train Disassembly And Assembly, Form No. KEBR1238-01.(1) Pinion gear.(2) Centerline of ring gear and bearing bores.(3) Distance for installed pinion ... 193.68 mm (7.625 in)(4) Torque for pinion nut (not shown) ... 950 to 1220 N m (700 to 900 lb ft)(5) Maximum allowable runout of ring gear ... 0.20 mm (.008 in)(6) Clearance between thrust screw and back face of ring gear ... 0.25 to 0.38 mm (.010 to .015 in)(7) Ring gear.Ring gear backlash setting ... 0.13 to 0.38 mm (.005 to .015 in)Pinion bearing preload must be checked for a rolling torque as follows: With force of 237 600 N (54 000 lbs) applied to cage or with pinion nut tightened to a torque of 950 to 1220 N m (700 to 900 lb ft), the torque required to rotate the bearing cage should be ... 0.6 to 1.7 N m (5 to 15 lb in) Use of a thinner spacer will increase the preload. A thicker spacer will decrease the preload. (8) Differential nest (spider pinions and side gears) rolling torque check: Maximum allowable torque to rotate differential nest (for one side gear only) ... 70 N m (50 lb ft)