ap3520b3550a

Rear axle wheel hubs - regreasing, checking tapered roller bearings

Type ap · topic 35.20 · version 0300 · 2019-06-13

Applies to: Rear axle 743.498 in model 688

Where it sits

Function group 2 Chassis › 35 Rear axle › 35.20 Wheel location, wheel hubs — Series 688

EinPAS 17 Drivetrain/axle › 17.51 Rear axle › 17.51.41 Wheel carrier/steering knuckle/wheel hub/wheel bearing — Series 688

EinPAS 17 Drivetrain/axle › 17.52 Additional axle › 17.52.42 Wheel carrier/steering knuckle/wheel hub/wheel bearing — Series 688

Also applies to engines/gearboxes: 743 498

AP35.20-B-3550A

Rear axle wheel hubs - regreasing, checking tapered roller bearings

12.06.2019

Rear axle

743.498 in model 688

Modification notes

12.06.2019

Grease

BF35.20-B-1001-01X

Rear axle wheel hubs - regreasing, checking tapered roller bearings

1

Sealant

2

Spacer ring

3

Inner roller bearing

4

Wheel hub

5

Outer roller bearing

B35.20-0034-11

Remove

1

Apply the parking brake and release lightly the wheel clamping nuts

2

Lift vehicle and support it on racks located under the rear axle beam

3

Remove the rear wheels

4

Disassemble wheel hub (4)

.

AR35.20-B-0320E

5

Remove the seal race ring (1)

.

AR35.20-B-0310-05A

The race should be removed and replaced with a new one whenever the respective sealant (1) is replaced.

Check

6

Remove the grease from the wheel hub (4) and wash all components

7

Check all parts for wear or damages, specially the bearings (3 and 5)

If necessary, replace the bearings (3 and 5).

Install

8

Install the seal race ring (1).

.

AR35.20-B-0310-05A

The race should be removed and replaced with a new one whenever the respective sealant (1) is replaced.

9

Thoroughly lubricate the sealant (1) and bearings (3 and 5) before installing them

.

AR35.20-B-0310-05A

If necessary, install a new sealant (1).

10

Supply the wheel hub (4) with grease

.Grease

*BF35.20-B-1001-01X

11

Assemble the wheel hub (4).

.

AR35.20-B-0320E

12

Install the rear wheels

13

Lower vehicle from rack and tighten wheels security nuts

Retighten them after traveling the first 50 to 100 km.

Observe torque for new valid wheels nuts (plain) only for stamped holes wheels (plain). The old nuts were tapered and valid with wheels with tapered drilling.

.Wheels nuts

*BA40.10-B-1001-03B

Disc wheels

Number

Designation

Type 688.1/2

BA40.10-B-1001-03B

Wheels nuts

Nuts from 02/01/2012 - hub centering

M18x1.5

Nm

320

Tapered nuts 31/12/2011 - centering by washers

M18x1.5

Nm

250

Wheel hub, hub cover

Number

Designation

Rear axle 743.496/497/498

BF35.20-B-1001-01X

Grease

Filling volume

gramas

37,5

Class

Specification (except Brazil)

MB 267.1

Specification (Brazil)

Consultar documento AH00.40-B-0001-01MBF no site Mercedes-Benz / Guia de Lubrificantes

Referenced documents