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Disassemble and assemble electrohydraulic control unit - AR27.19-P-0220A

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Transmission 722.6 in MODELS 129, 140, 163, 170, 199, 202, 208, 210, 211, 215, 220, 230, 240 

Transmission 722.6 in MODELS 461.302 /332 /342 /345, 463.206 /209 /232 /233 /240 /241 /243 /244 /245 /246 /247 /248 /249 /250 /254 /270 /271 /308 /309 /322 /323 /330 /331 /332 /333 

Shown on the electrohydraulic control unit in model 163 

Fig 1: Identifying Shift Plate, Electrical Control Unit & Components
G04606551Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Modification notes

24.9.97 Remove caps Step 1 new  
24.9.97 Caps for solenoid valves, new Step 1 BT27.19-P-0003-01A 
DISASSEMBLINGASSEMBLING Disassemble/assemble    
1 Take off caps of solenoid valves IMPORTANT Only on transmission 722.6 as of 1.8.97  
REFER TO COMPONENT MODIFICATIONS Caps for solenoid valve, new Transmission 722.6 BT27.19-P-0003-01A 
2 Unscrew bolts (17a, 17b) and remove leaf springs (17) IMPORTANTInstallation:  Note the different lengths of the bolts (17a, 17b).  
TORQUE SPECIFICATION *BA27.19-P-1002-01A 
3 Use pliers to pull modulating pressure control solenoid valve (Y3/6y1) and shift pressure control solenoid valve (Y3/6y2) out of shift plate (16) IMPORTANTInstallation:  Check the O-rings on the modulating pressure control solenoid valve (Y3/6y1) and on the shift pressure control solenoid valve (Y3/6y2); fit a new valve if necessary.  
SPECIAL TOOL Pliers Fig 2
4 Use pliers to pull 1-2 and 4-5 shift solenoid valve (Y3/6y3), 3-4 shift solenoid valve (Y3/6y4) and 2-3 shift solenoid valve (Y3/6y5) out of shift plate (16) IMPORTANTInstallation:  Check the O-rings on the 1-2 and 4-5 shift solenoid valve (Y3/6y3), 3-4 shift solenoid valve (Y3/6y4) and 2-3 shift solenoid valve (Y3/6y5); fit a new valve if necessary.  
SPECIAL TOOL Pliers Fig 2
5.1 Remove electric control unit (Y3/6) from shift plate (16) Transmission 722.6 up to end no. 0026194
IMPORTANTInstallation:  Make sure that the two centering pins of the electric control unit (Y3/6) engage in the shift plate (16).		  
5.2 Bend retaining lug on stiffening rib on oil-temperature sensor to one side and remove electric control unit (Y3/6) from shift plate (16) Transmission 722.6 as of end no. 0026195  
REFER TO COMPONENT MODIFICATIONS Retaining lug added to electrohydraulic control unit 722.6 BT27.19-P-0001-01A 
6 Disassemble shift plate (16) IMPORTANT Only when the shift plate (16) is dirty or metal shavings are present in the transmission oil. AR27.35-P-0350A 
7 Assemble in the reverse order    
TORQUE SPECIFICATION Electrohydraulic control unit

Number Designation Transmission 722.6
BA27.19-P-1002-01A Bolt, solenoid valve to shift plate Nm 8
Fig 2: Identifying Pliers (606 589 00 37 00)
G04606552Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
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