Hydraulic Control Unit, Removing And Installing: Installing
Follow all safety precautions exactly when replacing the hydraulic control unit. Install the "old" sensors again if possible. Refer to SAFETY PRECAUTIONS AND TEST PROCEDURES
Conditions
- Replace the seal between the hydraulic control unit -1- and the final drive housing.
- The centering pins -item 18- HYDRAULIC CONTROL UNIT, DISASSEMBLING AND ASSEMBLING must be installed inside the housing for the hydraulic control unit.
- The left -6- and right -7- lines must be installed loosely when attaching the hydraulic control unit -1-.
Attach the hydraulic control unit -1- to the rear final drive as follows:
First install the lines -6 and 7- into the chambers hand-tight -arrows B-.
Then install the bolts -2 through 5- hand-tight. One bolt -2- has a permanent seal on the head. Coat the thread with Sealing Compound :D 176 501 A1 .
Tighten the M8 x 30 bolts -2 through 5- to the tightening specification in the sequence: -4, 2, 5 and 3-.
Tighten the nuts -A arrows- and -B arrows- on the left -6- and right -7- lines to the tightening specification.
-- Install the All Wheel Drive Pump -V415-. Refer to All Wheel Drive Pump -V415-, REMOVING AND INSTALLING .
-- Install the wiring harness -3- to the final drive and subframe -5 through 7-.
-- Connect the connectors -4 and 2-. Pay attention to the marks made during the removal, that identify the allocation to the Oil Pressure/Temperature Sensor -- and which connectors go to the Clutch Valves --.
-- If equipped, position the wiring harness bracket -1- on the rear final drive and tighten the bolts -arrows- to the tightening specification. Make sure the wiring harness -3- does not get pinched.
Allocation for the Oil Pressure/Temperature Sensor -- and Clutch Valves -- connectors:
-1- = Oil Pressure/Temperature Sensor 2 -G640- Connector
-2- = Oil Pressure/Temperature Sensor -G437- Connector
-3- = All Wheel Drive Clutch Valve 2 -N446- Connector
-4- = All Wheel Drive Clutch Valve -N445- Connector
-- Fill the rear final drive with gear oil and then check the level. Refer to GEAR OIL LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING .
-- Fill with ATF in the rear final drive and check the ATF level. Refer to ATF LEVEL IN REAR FINAL DRIVE 0BF AND 0BE, CHECKING .
-- Install the rear section of the exhaust system and align it so it is free of tension. Refer to EXHAUST PIPES/MUFFLERS CEUC, CRDB, CTGE, CWUB, CWUCEXHAUST PIPES/MUFFLERS CLAB, CLAA, CDUC, CGQB, CKVB, CKVC, CDUD, CPNB, CTCB, CTCC, CVUA, CVUBEXHAUST PIPES/MUFFLERS CREC, CRED, CREHEXHAUST PIPES/MUFFLERS CGXB, CTUA .