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Disassemble and assemble electrohydraulic controller unit - AR27.19-P-0220B

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TRANSMISSION 722.9 

Electrohydraulic controller unit, model 221 

Fig 1: Electrohydraulic Controller Unit Components - Model 221 (1 Of 2)
G09975719Courtesy of MERCEDES-BENZ USA
Fig 2: Electrohydraulic Controller Unit Components - Model 221 (2 Of 2)
G09975720Courtesy of MERCEDES-BENZ USA
MODIFICATION NOTES

23.6.10 Work information on removing/installing the electrical controller unit, added    
INSTALLING Removing     
NOTES Notes on self-locking nuts and bolts   AH00.00-N-0001-01A
NOTES Information on preventing damage to electronic components due to electrostatic discharge   AH54.00-P-0001-01A
    NOTES In order to avoid damage to the transmission, always observe the Specifications for Operating Fluids!   
    IMPORTANT Before removal  of the electric controller unit (Y3/8), the guided test must always be performed with STAR DIAGNOSIS and the characteristics stored in the control unit (Y3/8n4) must be transferred.
After installation  of a new electric controller unit (Y3/8), the data stored before removal must be transferred to the new electric controller unit (Y3/8). Make sure that the STAR DIAGNOSIS unit used before removal is also used for installation.		  
1 Remove electrohydraulic controller unit   AR27.19-P-0200W 
DISASSEMBLINGASSEMBLING Disassemble/assemble     
2 Unscrew bolts (1) and remove leaf springs (2) TORQUE SPECIFICATION *BA27.19-P-1002-01A 
3 Pull control solenoid valves (Y3/8y1 to Y3/8y8) out of the electric controller unit (Y3/8) IMPORTANTAssembly:  Always mount each control solenoid valve in its original installation position again. Moisten O-rings with transmission oil.  
REFER TO CAPACITIES & SPECIFICATIONS Transmissions up to production date 18.06.2010 and all transmissions 722.9 in combination with engine 629 Automatic transmission fluids (ATF, Specification 236.14). See https://bevo.mercedes-benz.com/index.php?language_id=1
REFER TO CAPACITIES & SPECIFICATIONS All transmissions 722.9 as of production date 21.06.2010 except transmission 722.9 in combination with engine 629 Automatic transmission fluids (ATF, Specification 236.15). See https://bevo.mercedes-benz.com/index.php?language_id=1
CLEAN Clean     
4 Clean strainers of control solenoid valves INSPECT Check control solenoid valves and replace if necessary.
IMPORTANTAssembly:  Before installation, clean the strainer of the valves by swirling it around in transmission oil. Do not clean any other parts of the electric controller unit (Y3/8) with rags or compressed air!		 AR27.19-P-0212A 
REFER TO CAPACITIES & SPECIFICATIONS Transmissions up to production date 18.06.2010 and all transmissions 722.9 in combination with engine 629 Automatic transmission fluids (ATF, Specification 236.14). See https://bevo.mercedes-benz.com/index.php?language_id=1
REFER TO CAPACITIES & SPECIFICATIONS All transmissions 722.9 as of production date 21.06.2010 except transmission 722.9 in combination with engine 629 Automatic transmission fluids (ATF, Specification 236.15). See https://bevo.mercedes-benz.com/index.php?language_id=1
5 Remove bolt (3a). IMPORTANTAssembly:  Install new bolt (3a).  
TORQUE SPECIFICATION *BA27.19-P-1007-01A 
6 Remove bolts (3b) and electric controller unit (Y3/8) from valve body assembly (7) IMPORTANTAssembly:  Press in spring pin (5) from repair kit up to the end stop by hand and moisten O-rings (4d) on EHS connector (4e) with transmission oil.
NOTESAssembly:  Make sure that the retaining lug of the electric controller unit (Y3/8), which is located under the output speed sensor (Y3/8n3) (see picture), is positioned correctly on the valve body assembly (7) otherwise the electric controller unit (Y3/8) will be damaged.		  
REFER TO CAPACITIES & SPECIFICATIONS Transmissions up to production date 18.06.2010 and all transmissions 722.9 in combination with engine 629 Automatic transmission fluids (ATF, Specification 236.14). See https://bevo.mercedes-benz.com/index.php?language_id=1
REFER TO CAPACITIES & SPECIFICATIONS All transmissions 722.9 as of production date 21.06.2010 except transmission 722.9 in combination with engine 629 Automatic transmission fluids (ATF, Specification 236.15). See https://bevo.mercedes-benz.com/index.php?language_id=1
CLEAN Clean     
7 Clean magnet (6) of shift valve (6a) IMPORTANT Use a lint-free rag to remove shavings from magnet (6) of shift valve (6a).
IMPORTANTAssembly:  Check shift valve (6a) for correct seating in valve body assembly (7).		  
8 Assemble in the reverse order    
INSTALLING Install     
9 Install electrohydraulic controller unit (Y3/8) IMPORTANT After installation  of the new electric controller unit (Y3/8), the stored adaptation values are transferred. Transmission adaptation is only necessary after further repair measures. AR27.19-P-0200W 
ELECTROHYDRAULIC CONTROLLER UNIT

Number Designation Transmission 722.9
BA27.19-P-1002-01A Bolt, solenoid valve to shift plate Nm 8
BA27.19-P-1007-01A Bolt, controller unit for fully integrated transmission control to electrohydraulic controller unit Nm 8
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