Remove/install wheel bearing

AR35.20-S-0302S

20.5.14

MODEL

636, 639

Modification notes

9.5.14

Installation info added

Operation step 14

S35.20-4504-09

Shown on MODEL 639 up to vehicle identification number (VIN) 673613

1	Wheel hub		3	Clamping ring
2	Wheel bearings

S35.20-4505-09

Wheel hub

Wheel bearings

Clamping ring

 Danger !	Risk of death caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
	Remove
1	Remove drive shaft.		AR35.30-S-0620S
2	Remove brake disk		AR42.10-S-0240S
3	Remove rpm sensor from steering knuckle		AR42.30-S-0714S
		 Do not remove the electrical wiring harness.
4	Attach tools for removing wheel hub (1) as shown	 To do so, use the removal claw and enclosed screws/bolts. The cutout on the removal disk must rest against the adjusting device of the parking brake.
		 Extraction and insertion tool	*639589054300
5	Remove wheel hub (1)	 For this purpose, screw in bolts. The old wheel bearing (2) is destroyed in the process; the wheel hub (1) can be used again.
		 Extraction and insertion tool	*639589054300
6.1	Remove snap ring of wheel bearing (2)	MODEL 639.### ## as of 673614
6.2	Make notches on marked webs on circumference of clamping ring (3) as shown	MODEL 636, 639.### ## up to 673613
		 Make notches in the webs carefully with chisel blows. The wheel bearing seat in the steering knuckle can otherwise be damaged.
7	Attach tools for removing wheel bearing (2) as shown	 To do so, use a small retaining disk, threaded rod, knurled nut and removal sleeve together with the hollow piston cylinder, hand pump and hydraulic hose (complete). The collar of the small retaining disk must point toward the vehicle.
		 Hollow piston cylinder	*001589513300
		 Extraction and insertion tool	*639589054300
		 Hand pump	*652589003321
		 Hydraulic hose (complete)	*652589003323
8	Remove wheel bearing (2)	 The clamping ring (3) is destroyed when the wheel bearing (2) is removed. The hollow piston cylinder must be repositioned repeatedly owing to the small stroke.
9	Remove shield plate of drive shaft	 The shield plate can be used again.
10	Clamp wheel hub (1) in vise	 Use soft vise jaws. This prevents damage.
11	Detach bearing race from wheel hub (1)	 Check the wheel hub (1) for score marks; replace if necessary. Avoid damage to wheel hub (1).
		 To do so, release the bearing race with chisel blows, then position the tools as shown and detach the bearing race.
		 Puller, two-arm	*000589883300
		 Puller arms	*140589043400
	Clean
12	Clean bore in steering knuckle and wheel bearing seat	 Remove any remnants of clamping ring (3) if necessary.
	Check
13	Check bore surface in steering knuckle for damage	 If severe score marks, cracks or notches are detectable the steering knuckle must be replaced: To install the new wheel bearing (2), the bore surface must be clean and free from grease and oil. Do not use any lubricants when installing.
	Install
14	Attach tools for installing wheel bearing (2) as shown	 The black plastic seal of the wheel bearing (2) must point toward the rear axle differential. The brake system can otherwise malfunction as a result of an incorrect or missing rpm signal.
		 To do so, use a large retaining disk, threaded rod, knurled nut, pilot bushing and large pressure plate together with the hollow piston cylinder, hand pump and hydraulic hose (complete).
		 Hollow piston cylinder	*001589513300
		 Hand pump	*652589003321
		 Extraction and insertion tool	*639589054300
		 Hydraulic hose (complete)	*652589003323
15	Install new wheel bearing (2) partially	 Install the wheel bearing (2) up to approx. halfway. The hollow piston cylinder must be repositioned repeatedly owing to the small stroke.
16	Install new clamping ring (3) as shown	MODEL 636, 639.### ## up to 673613
		 To do so, the tools for installing the wheel bearing (2) must be partially removed.
17	Reattach tools for installing wheel bearing (2)	 Do not use the pilot bushing again.
		 Hollow piston cylinder	*001589513300
		 Hand pump	*652589003321
		 Extraction and insertion tool	*639589054300
		 Hydraulic hose (complete)	*652589003323
18	Install new wheel bearing (2) completely	 The hollow piston cylinder must be repositioned repeatedly owing to the small stroke.
	Check
19	Check that clamping ring (3) is seated correctly	MODEL 636, 639.### ## up to 673613
		 To do so, turn the clamping ring (3) slightly using a suitable tool and check that it is correctly seated; reposition the clamping ring (3) if necessary.
	Install
20	Install snap ring	MODEL 639.### ## as of 673614
21	Attach tools for installing wheel hub (1) as shown	 To do so, use a small retaining disk, threaded rod, knurled nut and large pressure plate together with the hollow piston cylinder, hand pump and hydraulic hose (complete).
		 Hollow piston cylinder	*001589513300
		 Hand pump	*652589003321
		 Extraction and insertion tool	*639589054300
		 Hydraulic hose (complete)	*652589003323
22	Press in wheel hub (1)	 The hollow piston cylinder must be repositioned repeatedly owing to the small stroke.
23	Detach tools	 Hollow piston cylinder	*001589513300
		 Hand pump	*652589003321
		 Extraction and insertion tool	*639589054300
		 Hydraulic hose (complete)	*652589003323
24	Install shield plate of drive shaft	 Make sure that the cutout for the rpm sensor is seated correctly. This avoids malfunctions.
25	Install rpm sensor		AR42.30-S-0714S
26	Install brake disk		AR42.10-S-0240S
27	Install input shaft		AR35.30-S-0620S