Remove/install automatic transmission · ar2710g0502fa · Mercedes-Benz WIS

AR27.10-G-0502FA

Remove/install automatic transmission

28.05.2018

Transmission

723.681/686 in model 437.467

Modification notes

17.09.2015

Tightening torque for nut, propeller shaft to drive flange, added

Step 5

G27.10-3119-78

1	Propeller shaft	7	Screw	13	Rear transmission carrier
2	Coolant hose	8	Screw	14	Clip
3	Coolant pipe	9	Bracket	15	Compressor line
4	Electrical connector	10	Cross strut	16	Nut
5	Bracket	11	Front transmission carrier
6	Screw	12	Center transmission carrier

17	Screw
18	Screw
19	Power take-off
20	Filler pipe
21	Coolant hose
22	Bracket
23	Solenoid valve unit
24	Electrical connector

G27.10-3120-76

25	Timing case
26	Cap
27	Wooden support
28	Ring gear carrier
29	Screw
Pfeil A	Access opening

G27.10-3121-74

G27.10-3124-78

13	Rear transmission carrier	32	Transmission bracket
30	Vent line	33	Torque converter
31	Screw	34	Guide pin

 	Remove/install
1	Remove body	 See information from vehicle manufacturer.
2	Drain coolant
			AP20.00-G-2080F
3	Remove exhaust pipe between valve fitting and rear muffler	 Clamp, flexible exhaust pipe to valve fitting	*BA49.10-N-1001-01G
4	Disconnect electrical connection (4)
5	Remove drive shaft (1)	 Nut, propeller shaft to output flange	*BA27.10-N-1001-04I
		 Nut, drive shaft to drive flange	*BA28.50-N-1001-01D
6	Remove bracket (5) between coolant pipe (3) and transmission
7	Detach coolant hose (2) from transmission and collect escaping coolant
8	Completely remove bracket (9) together with cross strut (10)
9	Remove clamp (14) from compressor line (15)
10	Unscrew nut (16) from compressor line (15)
11	Remove filler pipe (20) and seal bore on transmission using lint-free rag
12	Detach bracket (22) from cross member and place solenoid valve unit (23) to one side
13	Detach coolant hose (21) and bracket from coolant pipe on transmission, and collect escaping coolant	 The bracket for the coolant pipe is located in the vicinity of the power take-off (19).
14	Detach adaptation or connections from power take-off (19)	With code NU4 (PTO automatic transmission, 8 o'clock, low speed, pump)
		 See information from vehicle manufacturer.
15	Disconnect electrical connector (24) from power take-off (19)	With code NU4 (PTO automatic transmission, 8 o'clock, low speed, pump)
16	Remove screws (6, 18)	 Front transmission carrier to engine mount	*BA27.10-N-1009-04I
17	Detach radiator unit at top and tilt forward		AR20.20-G-3871-01F
		 For the following operation steps, the transmission must be raised along with the engine, to do so, the distance between the engine and the radiator unit must be increased.
18	Mount crane gripper chain to rear transmission carrier (13)
19	Raise transmission and engine using crane until the bolts (7, 8) can be removed	 Note distance between engine and radiator unit. Otherwise damage may occur to the engine or the cooler unit.
20	Remove bolts (7, 8, 17)	 Installation: The bolts (8) on the right side are countersunk bolts and they have to be installed again at the same position.
		 Front transmission carrier to engine timing case	*BA27.10-N-1008-04I
21	Disconnect center transmission carrier (12) from rear transmission carrier (13)	 Center transmission carrier to rear transmission carrier	*BA27.10-N-1007-04I
22	Remove center transmission carrier (12) together with front transmission carrier (11)
23	Lower transmission and engine using crane to horizontal position
24	Position a jack stand with suitable wooden support (27) under the timing case (25)	 Position wooden support as close to front bar of timing case (25).
25	Lower transmission and engine using crane until the timing case (25) makes contact with the wooden support (27), do not relieve load on crane or chain
26	Place suitable wooden support onto plate-type vehicle jack and prop-up transmission using plate-type vehicle jack	 Adjust the height of the plate-type vehicle jack so that the load of the transmission and engine is distributed evenly across the plate-type vehicle jack and the jack stand with the wooden support (27). Otherwise the timing case (25) may be damaged.
27	Remove crane and pull chain from rear transmission carrier (13)
28	Mount transmission carrier (32), as shown, onto transmission	 All four bolts and nuts must be tightened on the  transmission carrier (32). Otherwise a one-sided load may cause damage to the transmission.
		 Transmission bracket	*437589004000
29	Hook pull chain, as shown, into eyelet of transmission carrier (32)
30	Raise transmission using pull chain and crane far enough to tension the pull chain
31	Lower plate vehicle jack
32	Remove bracket and cover in front of access opening (arrow A)	 Use a screwdriver to pry off the cover in front of the access opening (arrow A).
		 Installation: Coat sealing surface between timing case (25) and cover with sealant.
		Sealant, Loctite 5970, 50 ml	*BR00.45-Z-1013-01A
33	Attach turning device for engine		AR03.30-G-1600-03B
		 Installation: Coat sealing surface between timing case (25) and cap (26) with sealant.
		 Inspection hole cap to timing case	*BA01.60-N-1002-01J
		Sealant, Loctite 5970, 50 ml	*BR00.45-Z-1013-01A
		 Turning device	*904589046300
34	Gradually turn the turning device and remove accessible bolts (29) around circumference of ring gear carrier (28)	 Installation: Remove guide pin (34), screw in first bolt (29) and tighten finger-tight. Screw-in all bolts (29) one after the other around the circumference of the ring gear carrier (28) and tighten finger-tight. As soon as all the bolts (29) are positioned, tighten bolts (29) to specified torque.
		 Bolt, torque converter to drive plate	*BA27.10-N-1003-04I
35	Detach vent line (30) from transmission	 Installation: Replace seal.
36	Mark installation position of brackets fastened in place with the bolts (31)
37	Remove bolts (31)	 Bolt, transmission to timing case	*BA27.10-N-1002-04I
38	Remove transmission
	Guide pin used to install the transmission		WF58.50-A-2710-01LA
		 Installation: Screw guide pin (34) into lowest threaded hole of torque converter (33). Turn ring gear carrier (28) until a bore for the bolts (29) is visible through the access opening (arrow A).
39	Place transmission onto suitable base and remove transmission carrier (32) from transmission	 Installation: All four bolts and nuts must be tightened on the transmission carrier (32). Otherwise a single-sided load may result in damage to the transmission housing.
		 Installation: Coat contact surface between guide pin on torque converter (33) and clutch plate on engine with long-life grease. Clean contact surface between timing case (25) and transmission and coat with sealant.
		Long-life grease	*BR00.45-Z-1001-06A
		Loctite 5203 sealant	*BR00.45-Z-1015-01A
		 Transmission bracket	*437589004000
40	Install in the reverse order
41	Fill transmission with transmission fluid	Only when installing a new transmission or when the oil was drained.
			AP27.00-G-2702FA
42	Check and correct oil level
			AP27.00-G-2710FA
43	Mount diagnostic system and read out, delete fault memory
			AD00.00-G-2000-04B
		 Stored faults, which may result from wires being disconnected or from simulation during assembly or testing, have to be processed and erased in the fault memories after completing the work.
44	Reinitialize the control unit using the diagnostic system	Only when installing a new transmission.
		 In the Actuations menu, perform "New initialization of the adapted parameters".
45	Detach diagnostic system
46	Conduct a road test	 Note the following when installing a new transmission: Perform test drive only after operating temperature is reached. In transfer case on-road and off-road gear shift through all transmission gears several times in succession until the transmission can be shifted easily following automatic teach-in. Only hand the vehicle over to the customer with the transmission taught in.
	Update Vehicle Documentation (VeDoc)
47	Document transmission number in VeDoc	Only when installing a new transmission.

 Timing case

Number	Designation		Engine 900.91/92, 902.92/93, 904.92/95, 906.935/95, 924.91/92/93, 926.96
BA01.60-N-1002-01J	Inspection hole cap to timing case	Nm	25