Disassemble, assemble front wheel hub - AR33.20-P-0320CW

MODEL 172

MODEL 204 (except 204.077/277/377/9) without 4MATIC

MODEL 207 Without 4MATIC

Fig 1: Identifying Front Wheel Hub Components (1 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Front Wheel Hub Components (2 Of 3)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Front Wheel Hub Components (3 Of 3)

Courtesy of MERCEDES-BENZ USA

	Disassemble
1	Remove front wheel hub		AR33.20-P-0310CW
2	Hammer out inner tapered roller bearing (9l) and radial shaft sealing ring (9a) with punch-out drift (05)	Punch-out drift	Fig 5
3	Press out tapered roller bearing outer race of outer tapered roller bearing (9c) using a workshop press and punch-out drift (05a)	Punch-out drift Workshop press	Fig 5
4	Press out tapered roller bearing outer race of inner tapered roller bearing (9b)	Press out tapered roller bearing-outer race from inner tapered roller bearing (9b) using insertion tool, part 10 (06d) and suitable drift.
4		Insertion tool	Figure
5	Clean inner tapered roller bearing (9l) and front wheel hub
	Checking
6	Check inner tapered roller bearing (9l), tapered roller bearing outer race of outer tapered roller bearing (9c) and tapered roller bearing outer race of inner tapered roller bearing (9b)		AR33.20-P-0310-02P
7	Check front wheel hub	Check threaded sockets for damage.
	Assemble
8	Draw in tapered roller bearing-outer race of inner tapered roller bearing (9b) and tapered roller bearing outer race of outer tapered roller bearing (9c) in front wheel hub	Draw in tapered roller bearing outer race of inner tapered roller bearing (9b) and tapered roller bearing outer race of outer tapered roller bearing (9c) into the front wheel hub using insertion tool, part 02 (06b) and insertion tool, part 03 (06c).
8		Insertion tool	Figure
9	Insert inner tapered roller bearing (9l) in front wheel hub	Grease the inner tapered roller bearing (9l) before inserting it.
	High temperature antifriction bearing grease (NLGI grade 2)	Specification 265.1	High temperature antifriction bearing grease (NLGI grade 2). See https://bevo.mercedes-benz.com/index.php?language_id=1
10	Install radial shaft sealing ring (9a)		AR33.20-P-0310-03SX
		Insertion tool	Figure
	Radial shaft sealing ring of front wheel hub modified	Except model 172	BT33.20-P-0310-02A
11	Fill wheel hub with grease
	High temperature antifriction bearing grease (NLGI grade 2)	Specification 265.1	High temperature antifriction bearing grease (NLGI grade 2). See https://bevo.mercedes-benz.com/index.php?language_id=1
12	Install front wheel hub		AR33.20-P-0310CW

Fig 4: Identifying Insertion Tool (203 589 02 43 00)

Courtesy of MERCEDES-BENZ USA

Fig 5: Identifying Extraction Drift (202 589 00 15 00)

Courtesy of MERCEDES-BENZ USA