Disassembly

When refitting, caulk the wheel hub fastening nut, proceeding as described below:

• Always use a new nut.
• Carefully clean the threaded tang of the axle shaft using a metal brush and then blowing with compressed air.
• Clean the axle shaft tang thread with ethyl spirits or heptane.
• Tighten the new nut to the specified torque.

Before change 266 ÷ 294 Nm
27.1 ÷ 30.0 kgm

After change 67 ÷ 74 Nm + 62° (*)
6.8 ÷ 7.5 kgm + 62°

(*): Check that the maximum torque when tightening 62° is between 200 and 360 Nm

• For angle tightening the nut use tool no. 1.820.622.000 as illustrated.

1. Using a chisel, caulk the nut collar with one or two caulks as illustrated.

DISASSEMBLY

• Place the complete upright in a vice grip with protective jaws and remove the hub retainer circlip.

1. Working on the press and using puller tool no. 1.821.051.000 withdraw the wheel hub from the upright.

1. Working on the press, using support no. 1.821.149.000 and puller tool no. 1.821.045.000 remove the bearing outer race from the upright.

• Move the bearing inner race away from the wheel hub contact using a suitable tool.

1. Working on the press, and using plate no. 1.820.047.002, half rings no. 1.820.223.000 and puller tool no. 1.821.051.000, withdraw the bearing inner race from the wheel hub.