Disassembling and assembling pinion housing with drive pinion

AR35.30-W-0470A

21.10.09

REAR AXLE 740.892 /894 /896, 748.2 /704 /705 /706 /708
without through-drive

Disassembling and assembling pinion housing with drive pinion

W35.30-1020-05

1 Collar nut

2 Connector flange

3 Protective cover
(for ring gear dia. 300 mm only)

4 Radial sealing ring

5 Outer tapered roller bearing

6 Outer race of outer bearing

7 Temperature sensor
(for maintenance system (WS) only)

8 Sealing ring

9 Pinion housing

10 Oil retainer

11 Shim

12 Spacer tube
(for ring gear dia. 300 mm only)

13 Inner race of outer bearing

14 Inner tapered roller bearing

15 Drive pinion

	Disassemble
1	Remove pinion housing (9) with drive pinion gear (15)		AR35.30-W-0469A
2	Remove temperature sensor (7)	 Only with maintenance system (WS).
3	Release collar nut (1)		AR35.30-W-0432-05A
4	Remove connector flange (2)	 Retainer wrench	*717589003100
		 Socket wrench bit with 300 mm dia. ring gear.	*001589220900
		 Socket wrench bit with 233 mm dia. ring gear.	*001589750900
		 Ratio wrench	*000589696300
		 Puller	*035589013300
5	Remove radial sealing ring (4)
6	Press drive pinion (15) from pinion housing (9)	 Do not damage the teeth on the drive pinion.
7	Remove shim (11) and spacer tube (12) from drive pinion gear (15)	 Spacer tube (12) with 300 mm dia. ring gear only.
8	Remove the outer tapered roller bearing (5) from the pinion housing (9)
9	Remove inner tapered roller bearing (14) from drive pinion (15)	 Hand pump	*652589003321
		 Hydraulic hose	*652589003323
		 Hydraulic cylinder	*715589153400
		 Adapter	*715589113400
		 Adapter	*715589123400
		 Adapter	*748589003400
		 Thrust piece	*731589026300
		 Gripper for 300 mm dia. ring gear.	*000589543400
		 Gripper for 233 mm dia. ring gear.	*000589553400
10	Remove inner outer race (13) and external outer race (6) from pinion housing (9)	 Extractor	*000589163300
11	Remove oil retainer (10) from pinion housing (9)
	Assemble
12	Install oil retainer (10) in the pinion housing (9)	 Drift with 300 mm dia. ring gear.	*305589021500
		 Drift with 233 mm dia. ring gear.	*731589001500
 Danger!	Risk of injury to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
13	Heat the pinion housing (9) to approx. 80 °C and fit inner outer ring (13) all the way into the pinion housing (9)	 Drift with 233 mm dia. ring gear.	*343589071500
		 Drift with 300 mm dia. ring gear.	*352589031500
 Danger!	Risk of injury to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
14	Heat the pinion housing (9) to approx. 80 °C and fit external outer ring (6) all the way into the pinion housing (9)	 Drift with 233 mm dia. ring gear.	*343589051500
		 Drift with 300 mm dia. ring gear.	*363589001500
15	Determine thickness of shim (11) on drive pinion (15)		AR35.30-W-0470-03A
			*BE35.30-N-1004-01A
 Danger!	Risk of injury to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
16	Heat inner tapered roller bearing (14) up to approx. 80 °C and fit all the way into the inner ring on the drive pinion (15)
17	Mount spacer tube (12) and determined shim (11) onto drive pinion (15)	 Spacer tube (12) with 300 mm dia. ring gear only.
18	Mount pinion housing (9) on the drive pinion (15)
19	Heat outer tapered roller bearing (5) up to approx. 80 °C and fit all the way into the inner ring on the drive pinion (15)
20	Checking friction torque of tapered roller bearings		AR35.30-W-0470-04A
			*BE35.30-N-1003-01A
		 Rear axle 748.21/22/23/24/26/27	*BA35.30-N-1007-03A
		 Rear axle 740.892/894/896, 748.704/705/706/708	*BA35.30-N-1007-03B
		 Ratio wrench	*000589696300
		 Socket wrench bit with 300 mm dia. ring gear.	*001589220900
		 Socket wrench bit with 233 mm dia. ring gear.	*001589750900
		 Torque wrench	*745589012100
		 Retainer wrench	*717589003100
21	Install radial sealing ring (4)	 Drift with 233 mm dia. ring gear.	*387589071500
		 Drift with 300 mm dia. ring gear.	*740589001500
22	Install coupling flange (2) with new collar nut (1)	 Oil teeth of drive pinion (15) lightly.
		 Rear axle 748.21/22/23/24/26/27	*BA35.30-N-1007-03A
		 Rear axle 740.892/894/896, 748.704/705/706/708	*BA35.30-N-1007-03B
		 Ratio wrench	*000589696300
		 Socket wrench bit with 300 mm dia. ring gear.	*001589220900
		 Socket wrench bit with 233 mm dia. ring gear.	*001589750900
		 Retainer wrench	*717589003100
23	Secure collar nut (1)		AR35.30-W-0432-03A
24	Install temperature sensor (7) with new sealing ring (8)	 Only with maintenance system (WS).
25	Fit pinion housing (9) with drive pinion gear (15)		AR35.30-W-0469A

Test and adjustment values for rear axle drive

Number	Designation		Rear axle 748.21/22/23/24 with ring gear 233 mm dia.	Rear axle 748.21/22/23/24 with ring gear 300 mm dia.


BE35.30-N-1003-01A	Friction torque of tapered roller bearings on drive pinion	Nm	2...3	2...3
BE35.30-N-1004-01A	Axial play at rear axle shaft (planetary gears)	mm	0.2...0.3	0.2...0.3

Test and adjustment values for rear axle drive

Number	Designation		Rear axle 748.26/27 with ring gear 233 mm dia.	Rear axle 748.26/27 with ring gear 300 mm dia.


BE35.30-N-1003-01A	Friction torque of tapered roller bearings on drive pinion	Nm	2 to 8	2 to 8
BE35.30-N-1004-01A	Axial play at rear axle shaft (planetary gears)	mm	0.2...0.3	0.2...0.3

Test and adjustment values for rear axle drive

Number	Designation		Rear axle 740.892/894/896, 748.701/704/707 with 300 mm ring gear-dia.	Rear axle 748.702/705 with ring gear 233 mm dia.


BE35.30-N-1003-01A	Friction torque of tapered roller bearings on drive pinion	Nm	2...3	2...3
BE35.30-N-1004-01A	Axial play at rear axle shaft (planetary gears)	mm	0.2...0.3	0.2...0.3

Test and adjustment values for rear axle drive

Number	Designation		Rear axle (NAG) 748.703/706 with 233 mm ring gear-dia.	Rear axle (NAG) 740.893/895/ 897/898, 748.708 with 300 mm ring gear-dia.


BE35.30-N-1003-01A	Friction torque of tapered roller bearings on drive pinion	Nm	2 to 8	2 to 8
BE35.30-N-1004-01A	Axial play at rear axle shaft (planetary gears)	mm	0.2...0.3	0.2...0.3