Install radial sealing ring into front wheel hub - AR33.20-P-0310-03SX

Fig 1: Identifying Insertion Tool (203 589 02 43 00)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Puller (001 589 02 33 00)

Courtesy of MERCEDES-BENZ USA

For radial shaft sealing ring (7) with race (7a), do not remove the race (7a) from the radial shaft sealing ring (7). Only install race (7a) together with the radial shaft sealing ring (7) in the front wheel hub (5). If the race (7a) is retrofitted into the radial shaft sealing ring (7), proper sealing cannot be guaranteed.

Fig 3: Identifying Radial Shaft Sealing Ring With Race And Front Wheel Hub

Courtesy of MERCEDES-BENZ USA

Metal tools should not be used on the radial shaft sealing ring (7) because the pulse ring for the left front axle rpm sensor and the right front axle rpm sensor (model 172, 204, 207, 212, 218) or the left front axle rpm sensor and right front axle rpm sensor (model 216, 221) is integrated into it. The rubberized side of the insertion tool part 01 must therefore face the radial shaft sealing ring (7).

If the radial shaft sealing ring (7) is not flush-fitted into the front wheel hub (5), the left front axle rpm sensor or the right front axle rpm sensor (model 172, 204, 207, 212, 218) or the left front axle rpm sensor or the right front axle rpm sensor (model 216, 221) will not send a signal.

Fig 4: Identifying Front Wheel Hub And Radial Shaft Sealing Ring

Courtesy of MERCEDES-BENZ USA

1. Clamp front wheel hub (5) in vise.
2. Pry old radial shaft sealing ring (7) out of front wheel hub (5) using screwdriver.

   Do not damage the snug fit of the radial shaft sealing ring (7) otherwise the front wheel hub (5) must be replaced.

3. Clean alignment seat of radial shaft sealing ring (7) in front wheel hub (5)!
4. Pull radial shaft sealing ring (7) using insertion tool part 01 (01) and insertion tool part 02 (02) until they are flush-fitted in the front wheel hub (5).

   For radial shaft sealing ring (7) with race, the insertion tool part 01 (01) and insertion tool part 02 (02) must be turned around. The rubber ring (a) is to be fitted between the insertion tool, part 01 (01) and the radial shaft sealing ring (7).

   Shown on radial shaft sealing ring (7) without race 

   Fig 5: Installing Radial Shaft Sealing Ring

   Courtesy of MERCEDES-BENZ USA

   Radial shaft sealing ring with race (7a) 

5. Detach given race (7a) before assembling front wheel hub from steering knuckle (6)

Do not use mounted race (7a) again, because when mounting the front wheel hub the sealing lip of the radial shaft sealing ring may fold over and sealing can then no longer be guaranteed.

Use puller (03) or carefully pry off alternative race (7a).

Fig 6: Identifying Removal Of Radial Shaft Sealing Ring Race

Courtesy of MERCEDES-BENZ USA