Assemble transfer case · ar2810w1002a · Mercedes-Benz WIS

Designation

Transfer case 750.850/851/852

Transfer case 750.860/861/
864/865

BA28.40-N-1013-01D

Screw plug for shift rod

AR28.10-W-1002A

Assemble transfer case

12.4.10

Transfer case 750.850 /851 /852 /860 /864 /865

W28.10-0007-06

1 Coupling flange to front axle

2 Off-road gear shift cylinder

3 Drive shaft clutch flange

4 Input shaft cover (only model designation 750.85)

5 Neutral position shift cylinder

6 Interaxle differential lock shift cylinder

7 Coupling flange to rear axle

8 Countershaft cover (only model designation 750.85)

9 Input shaft/countershaft cover (only model designation 750.86)

B17 Vehicle speed sensor

W28.10-0008-09

11 Radial sealing ring (outer)

12 Radial sealing ring (inner)

13 Housing front section

14 O-ring

15 Shift rod

16 Shift fork

17 Compression spring

18 Shim (only model designation 750.85)

19 Bearing outer race

20 Input shaft

21 Bearing outer race

22 Housing rear section

35 Bearing outer race

36 Shim

37 Oil distributor ring (only model designation 750.85)

38 Worm gear (only model designation 750.85)

39 Retainer (only model designation 750.85)

40 Woodruff key (only model designation 750.85)

41 Suction strainer (only model designation 750.85)

42 Sealing ring (only model designation 750.85)

B50 Transfer case temperature sensor

23 Spring washer

24 Screw

25 Bearing outer race

26 Pulse star

27 Washer

28 Screw

29 Oil scraper (only model designation 750.85)

30 Locking plate (only model designation 750.85)

31 Bolt (only model designation 750.85)

32 Countershaft

33 Bearing outer race

34 Planet carrier

	Assemble
1	Clean sealing surfaces of housing front section (13) and housing rear section (22)	 Check that the straight pins are seated securely.
2	Install output shaft to rear axle		AR28.50-W-1016A
3	Install output shaft to front axle		AR28.50-W-1004A
4	Fit removed shims (18) in housing front section (13)	 Only on model designation 750.85.
5	Install bearing outer race (19) in housing front section (13)	 Use a suitable drift.
6	Install bearing outer race (21) in housing rear section (22)	 Use a suitable drift.
7	Check/adjust axial play of input shaft (20)	 Only on model designation 750.85.	AR28.50-W-1017-01A
			*BE28.50-N-1001-01A
		 Dial indicator	*001589532100
		 Dial indicator holder	*363589022100
	Lifting tool for shafts		WF58.50-N-2850-03B
	Input shaft tensioning device		WF58.50-N-2850-02A
8	Fit planet carrier (34) in ring gear	 Gripper for model designation 750.85	*750589093400
		 Gripper for model designation 750.86	*750589073400
		Adapter	*715589223400
		 Holding device	*715589053100
9	Check/adjust axial play of planet carrier (34)		AR28.50-W-1003-02A
			*BE28.50-N-1004-01A
		 Dial indicator	*001589532100
		 Measuring device	*750589002100
		 Countersupport	*750589033100
		 Tensioning device for model designation 750.85	*750589023100
		 Tensioning device for model designation 750.86	*750589013100
10	Install bearing outer race (25)	 Use a suitable drift.
		Secure bearing outer race (25) with bolt and washer to prevent it from falling out.
11	Install countershaft (32)	 Tilt the countershaft (32) slightly when inserting.
12	Install oil scraper (29)	 Only on model designation 750.85.
		Position oil scraper (29) with new locking plate (30) and screw in bolts (31) finger-tight. Align sealing lip of oil scraper (29) with center of ring gear and push down slightly.Tighten and secure bolts (31).
			*BA28.10-N-1005-01D
13	Push O-ring (14), shift fork (16) and compression spring (17) onto shift rod (15)	 The long guide of the shift fork (16) must point toward the piston of the shift rod (15).
14	Insert shift fork (16) with shift rod (15) into sliding sleeve of input shaft (20)
15	Install input shaft (20) in housing rear section (22)	 Hold the compression spring (17) in the installation position and make sure that the shift rod (15) slides into the hole without jamming.
	Lifting tool for shafts	For model designation 750.85	WF58.50-N-2850-03B
		For model designation 750.86	WF58.50-N-2850-03C
16	Fit calculated shims (36) in housing front section (13)	 The shims (36) were calculated in operation step 9.
17	Install bearing outer races (33, 35) in housing front section (13)	 Use a suitable drift.
18	Attach housing front section (13) to housing rear section (22)		AR28.10-W-1002-01A
			*BA28.10-N-1006-01D
			*BA28.40-N-1013-01D
			*750589005900
			*BR00.45-Z-1015-01A
19	Install radial sealing rings (11, 12) and input shaft coupling flange (3)		AR28.40-W-0001A
20	Install off-road gear shift cylinder (2)		AR28.60-W-1001A
21	Attach pulse star (26)		*717589003100
			*BA28.50-N-1004-01A
22	Install oil distributor ring (37) and worm gear (38) with Woodruff key (40)	 Only on model designation 750.85. Install worm gear (38) with collar facing oil distributor ring (37).
23.1	Install input shaft/countershaft cover (9)	On model designation 750.86	AR28.50-W-1013A
23.2	Install input shaft cover (4) and countershaft cover (8)	On model designation 750.85
		Input shaft cover (4)	AR28.50-W-1011A
		Countershaft cover (8)	AR28.50-W-1012A
24	Install transfer case temperature sensor (B50)		AR28.19-W-1007B
25	Install speed sensor (B17)	Up to vehicle ident. end No. 501091	AR28.19-W-1006A
		As of vehicle ident. end no. 501092	AR28.19-W-1006B
26	Screw in suction strainer (41) with new sealing ring (42)	 Only on model designation 750.85
			*BA28.56-N-1001-01A

Test values for transfer case gear set, shafts

Number	Designation		Transfer case 750.850/851/852	Transfer case 750.860/861/ 864/865


BE28.50-N-1001-01A	Axial play of tapered roller bearings on input shaft	mm	0.06 to 0.16	0.06 to 0.16
BE28.50-N-1004-01A	Axial play of tapered roller bearings on planet carrier	mm	0.04 to 0.14	0.04 to 0.14

 Transfer case complete

Number	Designation			Transfer case 750.850/851/852	Transfer case 750.860/861/ 864/865


BA28.10-N-1005-01D	Bolt, oil scraper to rear section of housing	M6	Nm	17	-
BA28.10-N-1006-01D	Bolt, front section of housing to rear section of housing	M101.570	Nm	-	-
		M101.595	Nm	-	-
		M121.5	Nm	80	80

Transfer case housing

 Transfer case gear set, shafts

Number	Designation			Transfer case 750.850	Transfer case 750.851/ 852	Transfer case 750.860	Transfer case 750.861/ 864/865


BA28.50-N-1004-01A	Bolt, pulse star to countershaft	M121.5	Nm	50	50	50	50