Genuine Mercedes-Benz 190E Wheel Hub

Mercedes-Benz 190E Wheel Hub Parts and Q&A

• Front Hub
  124-330-22-25
  Q: How to remove, overhaul, and refit the Wheel Hub assembly on Mercedes-Benz 190E?

  A:

  The hub assembly should only be removed if the bearings need to be renewed, as the hub bearing inner race is a press-fit on the Steering Knuckle, and removal may damage the bearings. A press is necessary for dismantling and rebuilding the assembly; if unavailable, a large bench vice and spacers like large sockets can be used as substitutes. The inner races of the bearings are an interference fit on the hub, and if the inner race remains on the hub during pressing, a knife-edged bearing puller will be needed for removal. Begin by removing the front brake disc and, for models with ABS, the front wheel sensor. Tap out the grease cap from the hub's center, replacing it if damaged. Remove the radio interference spring if present, then slacken the hub nut clamp bolt and hub nut, removing the thrust washer if applicable. Withdraw the front hub assembly from the steering knuckle, using a puller if it is a tight fit. If the inner bearing race stays on the steering knuckle, use a knife-edge type puller to remove it, then slide off the hub oil seal and inspect the steering knuckle axle shaft for damage, renewing if necessary. For overhaul, remove the inner race from the outer bearing, carefully lever out the oil seal from the rear of the hub assembly, and tap the outer bearing inner race out using a hammer and punch. Remove the inner bearing outer race similarly, clean the hub thoroughly, and check for wear or damage, renewing as needed. During reassembly, apply a light coating of grease to the bearing outer race and hub contact surfaces, ensuring the inner bearing outer race is pressed fully into position squarely. Fit the outer bearing inner race and the inner race to the inner bearing, then install the oil seal with its sealing lip facing inwards. Pack the hub assembly with grease and fit the inner race to the outer bearing. For refitting, grease the hub rear oil seal lip and locate the hub assembly onto the steering knuckle shaft, then fit the thrust washer and screw on the hub nut. Rotate the hub assembly while using the hub nut to press it onto the steering knuckle axle, adjusting the hub bearing endfloat and tightening the hub nut clamp bolt to the specified torque. After setting the endfloat, remove the dial gauge, fit the radio interference spring if applicable, tap the grease cap into position, and refit the brake disc and ABS front wheel sensor if necessary.