Disassemble/assemble rear axle center assembly, adjusting gear set - AR35.31-P-0550D: Notes

Rear axle center assembly dia. in model 210 124.008 /028 /029 /031 /032 /034 /036 /051 /052 /061 /066/088 /091 /092, 129.058 up to 31.5.94, 129.061, 129.063 up to 31.5.94, 129.066, 140.028 /032 /033 up to 31.5.94, 140.042 /043 /063 /1, 210.070 up to 31.1.98, 210.072, 210.074 /270 up to 31.1.98, 210.272, 210.274 up to 31.1.98, 210.617 

Fig 1: Identifying Rear Axle Center Assembly Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Remove
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between the columns of the hydraulic hoist and position the four support plates below the hoist support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
1	Raise vehicle with lifting platform
2	Drain oil from rear axle center assembly (50)		AR35.31-P-0520-06A
		Cleaning spray, Loctite 7063 (150ml)	*BR00.45-Z-1046-04A
		Sealant, Omnifit 100H (50 g)	*BR00.45-Z-1061-01A
		Oil drain plug	*BA35.31-P-1003-02A
	Oil filler and drain screw on rear axle center assembly modified	as of 19.01.04	BT35.31-P-0015-01A
3	Remove rear axle center assembly (50)	Model 124	ra35001240520x
		Model 129	AR35.31-P-0520C
		Model 140	AR35.31-P-0520A
		Model 210	AR35.31-P-0520B
	Threaded bore for rpm sensor routed at rear axle housing	Model 124, 129, 140	BT35.31-P-0004-01A
	Features, installation survey for rear axle center assemblies		GF35.31-P-1000-01D
	Disassemble
4	Clamp rear axle center assembly (50) in assembly stand		AR35.31-P-0540-06B
5	Detach end cover (54)
6	Pull circlips (30) off both connecting flanges (33 or 33a, 33b)		AR35.31-P-0540-01A
7	Pull out connecting flanges (a, 33b)
8.1	Detaching grooved ball bearing for connecting flange	Vehicles with rear axle with automatic locking differential (ASD) code 211a bzw. with acceleration slip regulation (ASR) code 471a	AR35.31-P-0540-04A
9.1	Removing spacer rings (31b)	Vehicles without ASD
10.1	Remove hydraulic line (70l)	Vehicles with rear axle with automatic locking differential (ASD) code 211a	AR35.41-P-0545-01D
11	Dismantle side bearing cap (27b/27c, 27d)	Mark bearing cap together with shim (26).	AR35.31-P-0550-39D
12	Remove differential (13) from rear axle housing
13	Hammer left and right radial sealing ring (32 bzw. 32a, 70j) out of the bearing caps		AR35.31-P-0550-40D
14	Press both tapered roller bearing outer races (11a) out of the bearing caps	Mark tapered roller bearing outer races (11a).
		Vehicles without ASD	AR35.31-P-0550-41D
		Vehicles with rear axle with automatic locking differential (ASD) code 211a	AR35.31-P-0550-41E
15	Pull both tapered roller bearing inner races (11b) off differential (13)	Mark tapered roller bearing inner races (11b).	AR35.31-P-0550-04C
16	Slacken and remove locking bolts (13a) from crown wheel (47a)	Mark position of ring gear (47a) relative to the differential (13)
17	Carefully press off crown wheel (47a) from differential (13)
18	Release, unscrew twelve-point nut (40) on joint flange (a)		AR35.31-P-0550-35C
19	Detach joint flange (a)	If necessary mark position of joint flange in relation to drive pinion.	AR35.31-P-0550-06B
	Radial seal ring and joint flange on drive pinion modified	as of 01.04.98	BT35.31-P-0012-01A
20	Press drive pinion (47) out of rear axle housing		AR35.31-P-0550-07A
21	Press radial sealing ring (42) out of the rear axle housing using a suitable screwdriver		AR35.31-P-0550-08B
	Radial seal ring and joint flange on drive pinion modified	as of 01.04.98	BT35.31-P-0012-01A
22	Remove tapered roller bearing inner race (43d) with thrust washer (43a)
	Integrated thrust washer on tapered roller bearing inner race	as of 14.02.94	BT35.31-P-9402-01A
23	Remove tapered roller bearing outer race (46b, 43e) and shim (45) from rear axle housing		AR35.31-P-0550-09D
24	Remove spacer sleeve (44) with bearing washers (48) from drive pinion (47)
25.1	Pull ABS gear (49) off drive pinion (47)	Vehicles with antilock brake system (ABS) code 470a, except vehicles with ETS, ASR, ESP	AR35.31-P-0550-30B
26	Pull tapered roller bearing inner race (46a) off drive pinion (47)		AR35.31-P-0550-10C
	Check
27	Check all parts for reusability and replace if necessary	If there is severe galling on the contact surfaces of the connecting flange and joint flange due to the radial sealing ring, the flanges should be replaced.
28.1	Check drive pinion (47) and crown wheel (47a) for match-up number	Only lapped gear sets up to approx. 06/95 have a match-up number. Each lapped gear set is checked for the best possible smooth running and marked with a consecutive match-up number that is marked on both parts	AR35.31-P-0550-11A
	Ground gear sets	Phased in as of 06/95	BT35.31-P-0011-01B
	Assemble, adjust gear assembly
29	Press tapered roller bearing inner race (46a) onto drive pinion (47)		AR35.31-P-0550-12C
	Press-on sleeve for tapered roller bearing inner race		WF58.50-P-3531-03B
30.1	Press ABS gear (49) onto drive pinion (47)	Vehicles with antilock brake system (ABS) code 470a, except vehicles with ETS, ASR, ESP	AR35.31-P-0550-31B
	Press-on sleeve for ABS gear wheel		WF58.50-P-3531-04B
		Number of teeth on ABS gear: ↓
		Features, installation survey for rear axle center assemblies	GF35.31-P-1000-01D
31	Calculate thickness for shim (45) and install in rear axle housing	Use data sheet: ↓ Data sheet, Adjusting rear axle gear set: Order No. B20.650.06.080.00B	AR35.31-P-0550-13D
32	Install tapered roller bearing outer races (46e, 43b) in rear axle housing		AR35.31-P-0550-14C
33	Install spacer sleeve (44) on drive pinion (47) with double-sided bearing washers (48)	Always replace spacer sleeve (44) and bearing washers (48).	AR35.31-P-0550-26B
34	Insert drive pinion (47) into rear axle housing.	Support drive pinion (47) with removal, installation device.	AR35.31-P-0550-15D
35.1	Clip pressure plate (43a) onto the tapered roller bearing inner race (43d)	Rear axle center assembly up to 13.02.94	AR35.31-P-0550-37C
	Integrated thrust washer on tapered roller bearing inner race	Rear axle center assembly as of 14.02.94	BT35.31-P-9402-01A
36	Insert tapered roller bearing-inner race (43d) on the drive pinion (47) and press in together with the radial sealing ring (42)	Replace radial sealing ring (42) and coat the lip with universal hypoid gear oil.	AR35.31-P-0550-16C
	Universal hypoid transmission fluid		BB00.40-P-0235-07A
	Radial seal ring and joint flange on drive pinion modified	as of 01.04.98	BT35.31-P-0012-01A
37	Push joint flange (41 or 41a) onto the drive pinion (47)	Possibly observe applied marking. Coat contact surface for radial seal ring with universal hypoid gear oil:
	Universal hypoid transmission fluid		BB00.40-P-0235-07A
	Imbalance at drive pinion joint flange reduced	Model 124, 129	BT35.31-P-0007-01A
	Radial seal ring and joint flange on drive pinion modified	as of 01.04.98	BT35.31-P-0012-01A
38	Screw on twelve-point collar nut (40)	Replace twelve-point collar nut.
		Socket wrench bit	Figure
39	Adjust friction torque of drive pinion bearing		AR35.31-P-0550-17C
40	Check adjustment dimension for drive pinion (47)		AR35.31-P-0550-18D
41	Secure twelve-point collar nut (40) on joint flange (41 or 41a)		AR35.31-P-0530-01B
	Caulker for securing twelve-point collar nut (40) on joint flange (41 or 41a)		WF58.50-P-3531-01A
42.1	Disassemble and assemble differential (13)	Vehicles without ASD	AR35.31-P-0560A
42.2	Dismantle and assemble ASD differential (13)	Vehicles with rear axle with automatic locking differential (ASD) code 211a	AR35.41-P-0560C
43	Mount ring gear (47a) on differential (13)	Observe marking applied to ring gear (47a) and differential (13).	AR35.31-P-0550-19D
44	Press tapered roller bearing-inner races (11b) onto differential (13)		AR35.31-P-0550-20D
45	Press both tapered roller bearing outer races (11a) into bearing cap	Vehicles without ASD	AR35.31-P-0550-41D
		Vehicles with rear axle with automatic locking differential (ASD) code 211a	AR35.31-P-0550-41E
46	Press radial seal rings (a, 70j) into bearing cap	Replace radial sealing ring (32 or 32a, 70j) and coat on the lip with Universal hypoid gear oil.
	Universal hypoid transmission fluid		BB00.40-P-0235-07A
		Vehicles without ASD/ASR	AR35.31-P-0550-42D
		Model with acceleration slip regulation (ASR) code 471a	AR35.31-P-0550-42E
		Vehicles with rear axle with automatic locking differential (ASD) code 211a	AR35.31-P-0550-42F
47	Slide side bearing cap (27b/27c, 27d) into rear axle gear housing (50) and inserting differential (13)	Observe scribe mark provided on bearing cap with shim (26). Coat the circumference of the O-rings in the bearing cap with Universal hypoid gear oil.	AR35.31-P-0550-43D
	Universal hypoid transmission fluid		BB00.40-P-0235-07A
48	Pre-tension (spreading) rear axle housing and measuring expanded dimension (expansion)		AR35.31-P-0550-44D
49	Measure the gear backlash between the drive pinion (47) and ring gear (47a) and correct if necessary	The adjustment of the tapered roller bearing and the gear set are okay, when the spreading dimension (widening) of the rear axle housings and the gear backlash are within the nominal values. This can prevent damage to the teeth of the drive pinion (47) and ring gear (47a).	AR35.31-P-0550-25D
50	Detach stops for measuring bracket
51.1	Pressing on grooved ball bearing for connecting flange	Vehicles with rear axle with automatic locking differential (ASD) code 211a bzw. with acceleration slip regulation (ASR) code 471a	AR35.31-P-0540-04A
52.1	Attach hydraulic line (70l)	Vehicles with rear axle with automatic locking differential (ASD) code 211a	AR35.41-P-0545-01D
53.1	Push spacer rings (31b) onto connecting flange (33 or 33a)	Vehicles without ASD
54	Install connecting flanges (33 or 33a, 33b) in differential (13)
	Connecting flange with centering	Model 124, 129, 140	BT35.31-P-0009-01A
55	Mount circlips (30) on connecting flanges (33 or 33a, 33b)	Replace circlip (30).	AR35.31-P-0540-01A
56.1	Check axial play of connecting flange (33 or 33a) and adjust if necessary	Vehicles without ASD No axial play adjustment is required on vehicles with rear axle with automatic locking differential (ASD) code 211a	AR35.31-P-0540-02A
57	Attach end cover (54)	Clean sealing surfaces and coat with sealant.	AR35.31-P-0550-28D
58	Replace rear axle breather (55) on rear axle housing		*BA35.31-P-1005-02A
59	Detach rear axle center assembly (50) from assembly stand
	Install
60	Install rear axle center assembly (50)	Model 124	ra35001240520x
		Model 129	AR35.31-P-0520C
		Model 140	AR35.31-P-0520A
		Model 210	AR35.31-P-0520B
	Threaded bore for rpm sensor routed at rear axle housing	Model 124, 129, 140	BT35.31-P-0004-01A
61	Pour oil into the rear axle center assembly (50)	Model 129, 140, 210	AR35.31-P-0520-03A
		129	*BF35.31-P-1001-01C
		140	*BF35.31-P-1001-01A
		210	*BF35.31-P-1001-01E
		Cleaning spray, Loctite 7063 (150ml)	*BR00.45-Z-1046-04A
		Sealant, Omnifit 100H (50 g)	*BR00.45-Z-1061-01A
		Oil filler screw for rear axle center assembly	*BA35.31-P-1002-02A
		Model 124	AR35.31-P-0520-03AA
		124	*BF35.31-P-1001-01B
		Cleaning spray, Loctite 7063 (150ml)	*BR00.45-Z-1046-04A
		Sealant, Omnifit 100H (50 g)	*BR00.45-Z-1061-01A
		Oil filler screw for rear axle center assembly	*BA35.31-P-1002-02A
	Oil filler and drain screw on rear axle center assembly modified	as of 19.01.04	BT35.31-P-0015-01A
62.1	Bleeding ASD hydraulic system	Vehicles with rear axle with automatic locking differential (ASD) code 211a
		Model 124	ra35001240519x
		Model 129	AR35.41-P-0519C
		Model 140	AR35.41-P-0519A

Rear axle center assembly housing

Rear axle center assembly housing

Rear axle center assembly gear set

Rear axle center assembly gear set

Rear final-drive unit

Rear final-drive unit

Rear final-drive unit

Rear final-drive unit

Rear final-drive unit

Rear final-drive unit

Fig 2: Identifying Assembly Stand (129 589 00 31 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 3: Identifying Removal And Installation Tool (116 589 01 62 00)

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Fig 4: Identifying Removal And Installation Tool (129 589 02 43 00)

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Fig 5: Identifying Remover (116 589 00 35 00)

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Fig 6: Identifying Puller (123 589 08 33 00)

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Fig 7: Identifying Pin Wrench (129 589 01 07 00)

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Fig 8: Identifying Wrench Socket (126 589 02 09 00)

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Fig 9: Identifying Puller (129 589 01 33 00)

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Fig 10: Identifying Removal And Installation Tool (201 589 02 43 00)

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Fig 11: Identifying Two-Legged Puller (000 589 88 33 00)

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Fig 12: Identifying Puller (001 589 50 33 00)

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Fig 13: Identifying Extension (000 589 63 34 00)

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Fig 14: Identifying Collet Chuck (000 589 34 34 00)

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Fig 15: Identifying Open-End Wrench (140 589 00 01 00)

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Fig 16: Identifying Dial Indicator Holder (363 589 02 21 00)

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Fig 17: Identifying Measuring Plate (601 589 00 23 00)

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Fig 18: Identifying Measuring Device (116 589 07 21 00)

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Fig 19: Identifying Measuring Device (116 589 01 21 00)

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Fig 20: Identifying Dial Indicator Holder (111 589 08 23 00)

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Fig 21: Identifying Adjustment Gage (115 589 05 21 00)

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Fig 22: Identifying Installer (116 589 11 61 00)

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Fig 23: Identifying Puller (000 589 65 33 00)

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Fig 24: Identifying Drift (124 589 02 15 00)

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Fig 25: Identifying Drift (208 589 00 15 00)

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Fig 26: Identifying Torque Measuring Instrument (001 589 49 21 00)

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Fig 27: Identifying Connecting Piece (100 589 02 59 00)

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Fig 28: Identifying Remote Thermometer (124 589 07 21 00)

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Fig 29: Identifying Drift (140 589 06 15 00)

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Fig 30: Identifying Drift (126 589 04 15 00)

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Fig 31: Identifying Drift (124 589 01 15 00)

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Fig 32: Identifying Spring Compressor (116 589 08 61 00)

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Fig 33: Identifying Spring Compressor (116 589 18 61 00)

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Fig 34: Identifying Stop (201 589 01 63 00)

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Fig 35: Identifying Contact Arm (126 589 08 21 00)

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Fig 36: Identifying Backlash Measuring Instrument (201 589 03 21 00)

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Fig 37: Identifying Collet Chuck (140 589 00 34 00)

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