Replace front axle wheel hub · sm3320w0003e · Mercedes-Benz WIS

SM33.20-W-0003E

Replace front axle wheel hub

5.2.10

FRONT AXLE 739.5 in MODEL 950

FRONT AXLE 739.5 in MODEL 950 with REAR AXLE 749.108
Service measure with code: WHEEL HUB 6

W33.20-1023-05

1 Wheel hub with brake disc

2 Cylinder head bolt

3 Thrust plate

4 Clamp nut

5 Gasket

6 Cover

7 Screw

Ordering parts:

To avoid bottlenecks, the axle model designations of the front, leading and trailing axle installed in the vehicles in question are to be determined before ordering parts.

 Scrap the removed wheel hubs.

Operation no. of operation texts or standard texts and flat rates

Category	Op. no.	Operation text	Time	Acc. no.	Code
O	025518	OPERATION: REPLACE FRONT AXLE WHEEL HUBS	3,8h	33 920 73	WHEEL HUB 6
O	025519	OPERATION: IN ADDITION TO REPLACE FRONT AXLE WHEEL HUB, REPLACE WHEEL HUBS OF FRONT/TRAILING AXLE	3,6h	33 920 73	WHEEL HUB 6

	Removing
1	Remove wheels		AR40.10-W-1100A
2	Remove brake pads		AR42.10-W-0170A
3	Remove brake carrier with brake caliper		AR42.10-W-0600A
4	Remove ABS sensor		AR42.30-W-0150A
5	Remove cover (6)	 Scrap cover (6) and bolts (7).
6	Loosen cylinder head bolt (2) and screw off clamp nut (4)		*739589001300
7	Remove thrust washer (3)
8	Detach wheel hub (1)		*739589004300
		 Scrap wheel hub (1) complete.
9	Remove rust from steering knuckle contact surface
10	Degrease bearing seats at axle journal
	Install
11	Draw new wheel hub (1) onto the steering knuckle	 Wheel hub is preassembled and tapered roller bearings are greased.	AR33.20-W-0310-04A
			*739589004300
12	Fit thrust plate (3)
13	Tighten clamp nut (4) until all play is eliminated from tapered roller bearing seat	 When tightening turn the wheel hub (1) and in the process apply a few blows in a crosswise pattern on the wheel hub (1).
			*739589001300
		 Axle model 739.5	*BA33.20-N-1002-01B
		 Axle model 749.108	*BA35.20-N-1001-06G
14	Adjust wheel bearing play		AR33.20-W-0310-13A
		Axle model 739.5	*BE33.20-N-1001-01B
		Axle model 749.108	*BE35.20-N-1001-02D
			*363589022100
			*001589532100
			*739589001300
15	Tighten cylinder head bolt (2) and screw on clamp nut (4) until tight	 Axle model 739.5	*BA33.20-N-1003-01B
		 Axle model 749.108	*BA35.20-N-1002-06G
16	Recheck wheel bearing play and adjust if necessary		AR33.20-W-0310-13A
17	Install new cover (6)	 Use the cover (6), seal (5) and bolts (7) included in the wheel hub kit.
		Axle model 739.5	*BA33.20-N-1004-01B
		 Axle model 749.108	*BA35.20-N-1003-06G
18	Install brake carrier with brake caliper		AR42.10-W-0600A
19	Install brake linings		AR42.10-W-0170A
20	Install ABS sensor		AR42.30-W-0150A
21	Mount wheels		AR40.10-W-1100A

Test values for wheel hub

Number	Designation		Front axle 739.5


BE33.20-N-1001-01B	Wheel bearing play at front axle	mm	0.02...0.04

Test values for wheel hub

Number	Designation		Trailing axle 749.011/111/ 108/109/110/ 731/732/733


BE35.20-N-1001-02D	Wheel bearing play on wheel hub	mm	0.02...0.04

 Wheel location, hub

Number	Designation			Front axle 739.3/5/9


BA33.20-N-1002-01B	Clamp nut at steering knuckle	M451.5	Nm	240
BA33.20-N-1003-01B	Bolt at clamping nut		Nm	65
BA33.20-N-1004-01B	Bolt, cover to wheel hub	M8	Nm	35
		M10	Nm	45
		M121.5	Nm	85

 Hub

Number	Designation			Trailing axle 749.108/109/110/731/732


BA35.20-N-1001-06G	Clamping nut at steering knuckle	M451.5	Nm	240
BA35.20-N-1002-06G	Cylinder head bolt to clamping nut		Nm	65
BA35.20-N-1003-06G	Bolt, cover to wheel hub	M8	Nm	35
		M16	Nm	-

363 589 02 21 00

001 589 53 21 00

739 589 00 13 00

739 589 00 43 00

Dial indicator holder

Pulling and installing device

Wrench socket

Dial indicator

Parts ordering notes

Part no.	Designation	Quantity
A 943 330 00 25 05	Wheel hub kit for one axle complete with brake disks; Axle model 739.500/510/520	1
A 943 330 01 25 05	Wheel hub kit for one axle complete with brake disks; Axle model 749.108 (trailing axle)	1
A 943 330 02 25 05	Wheel hub kit for one axle complete with brake disks; axle model 739.550	1

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