PIN 0103426 - Caterpillar

1. Freeze ring gear (1) and press into axle housing (2) with chamfer side of ring gear toward the axle housing. Check for full seating of the ring gear against the housing shoulder.2. Press bearing cups (4) and (6) into housing and check for full seating of bearing cups against housing shoulders.3. Press bearing cone (7) on axle (9) and check for full seating of cone against the axle shoulder. Lubricate the cone roller assembly.4. Install Duo-Cone seals (8) to both axle (9) and housing (2). Rubber toric seals and all surfaces in contact with them must be clean and dry at assembly. Put a thin layer of oil on the surfaces of the metal seals that are in contact just before installation. The metal seal must be assembled square with the bore, and the rubber toric seals must not be bulged or twisted.5. Secure axle (9) in a vertical position with the rim flange down.6. Lower housing (2) over the axle.7. Press bearing cone (5) onto axle (9) with endplay remaining in the bearing. Lubricate the cone roller assembly.8. Lubricate and install adjusting nut (3). Tighten the nut until only a small amount of endplay remains in the axle/bearing assembly.9. Measure the torque required to rotate housing (2). This is the seal drag torque. To do this, tighten an appropriate bolt and nut through an outer bolt hole in axle housing (2). Place a 203 mm (8.0 in) torque wrench on this bolt so that it is in line with the center of axle shaft (9). While turning housing (2) with the torque wrench, note the reading on the torque wrench and calculate the actual seal drag torque with the following formula: Where:"SDT" is the actual seal drag torque (in N m)"C" is the reading on the torque wrench (in N m)."B" is the length of the torque wrench (in meters)."A" is the bolt circle radius of axle housing (2) in meters. Bolt circle radius ... 0.188 m (7.4 in)10. While turning housing (2) with the torque wrench, tighten nut (3) until the torque wrench reading calculated with the following formula is reached. Where:"C" is the reading on the torque wrench (in N m)."B" is the length of the torque wrench (in meters)."A" is the bolt circle radius of axle housing (2) in meters. Bolt circle radius ... 0.188 m (7.4 in)"T" is the rolling torque specification for axle bearing preload.Rolling torque: New bearings ... 4 to 9 N m (35 to 80 lb in)Used bearings ... 2 to 4.5 N m (18 to 40 lb in)"SDT" is the actual seal drag torque (in N m) from Step 9.Check to be sure that there is zero end play of axle shaft (9).11. If axle bearing preload rolling torque exceeds the specification, back off nut (3) one-eighth turn and reseat bearing cone (5) against nut (3). Perform Step 10 again.