Hydraulic Control Unit, 0BE, 0BF

Fig 1: Identifying Hydraulic Control Unit Replacement Components

Courtesy of AUDI OF AMERICA, LLC

1. Bolt
   • 5 Nm
2. All Wheel Drive Pump -V415-
   • Removing and installing, refer to All Wheel Drive Pump -V415-, 0BE, 0BF 
3. O-ring
   • Always replace.
4. Adapter
   NOTE:

   The adapter could fall out when removing the All Wheel Drive Pump -V415-.

   Insert the adapter into the recesses in the hydraulic pump before installing the All Wheel Drive Pump -V415-.

5. ABS Hydraulic Pump
   • Consists of a guide ring, the housing and 6 pistons
   • Assembling, refer to Fig 2
6. Ball Bearing
   • Can be installed and removed by hand
7. Left line
   • Tighten the nuts to 30 Nm.
   • Is installed between the hydraulic control unit and the left chamber
   • Install both nut hand-tight when installing
8. O-ring
   • Always replace.
9. Oil Pressure/Temperature Sensor -G437-
   • 10 Nm
   • Brown connector
   • Removing and installing, refer to Oil Pressure/Temperature Sensor -G437- OR Oil Pressure/Temperature Sensor 2 -G640-, 0BE, 0BF 
10. Oil Pressure/Temperature Sensor 2 -G640-
    • 10 Nm
    • Black connector
    • Removing and installing, refer to Oil Pressure/Temperature Sensor -G437- OR Oil Pressure/Temperature Sensor 2 -G640-, 0BE, 0BF 
11. All Wheel Drive Clutch Valve 2 -N446-
    • Color: brown
    • Removing and installing, refer to All Wheel Drive Clutch Valve -N445- OR All Wheel Drive Clutch Valve 2 -N446-, 0BE, 0BF .
    • Installed position, the connector faces upward toward the Oil Pressure/Temperature Sensor --
      CAUTION:

      Do not confuse with the All Wheel Drive Clutch Valve -N445-.

12. All Wheel Drive Clutch Valve -N445-
    • Color: black
    • Removing and installing, refer to All Wheel Drive Clutch Valve -N445- OR All Wheel Drive Clutch Valve 2 -N446-, 0BE, 0BF .
    • Installed position, the connector faces upward toward the Oil Pressure/Temperature Sensor --
      CAUTION:

      Do not confuse with the All Wheel Drive Clutch Valve 2 -N446-.

13. Bolt
    • 2.5 Nm
14. O-ring
    • Always replace.
    • Mount onto the clutch valve --
15. Pressure Spring
    • Insert into the guide -item 16-  16
16. Guide
    • Installed position, large diameter faced the ball -item 17- in  17
17. Ball
    • Insert into the guide before installing -item 16- in  16
18. Hydraulic Control Unit Housing
    • With centering pins -arrows-
    • The centering pins lock the hydraulic control unit and seal to the final drive housing.
19. Ball
    • Install in the hole in the shuttle valve before installing -item 21- in  21
20. O-ring
    • Always replace.
21. Shuttle valve
    • 8 Nm
    • Removing and installing, refer to Fig 4
22. Gasket
    • With screen
    • Install on the centering pins in the hydraulic control unit housing
23. Right Line
    • Tighten the nuts to 30 Nm.
    • Is installed between the hydraulic control unit and the right chamber
    • Install both nut hand-tight when installing

Fig 2: Assembling Hydraulic Pump

Courtesy of AUDI OF AMERICA, LLC

-- Install the 6 pistons -A- in the housing -B-.

-- Install the guiding ring -C- so that the piston touches the shoulder -arrow-.

-- Insert the hydraulic pump -1- with the guide ring -2- in the in the hydraulic control module housing.

Fig 3: Identifying Hydraulic Control Unit Housing

Courtesy of AUDI OF AMERICA, LLC

Function Test 

-- Turn the hydraulic pump -1- several times. While doing this pay attention to the following:

• When turning the hydraulic pump it must not become hooked or tilted.
• All pistons must be removed and pressed in.

Fig 4: Identifying Shuttle Valves, Removal/Installation

Courtesy of AUDI OF AMERICA, LLC

-- Remove the shuttle valves -A-. Always remove the ball -C- as well.

-- Insert the ball into the hole in the shuttle valve when installing.

-- Install the shuttle valve all the way with a new O-ring -B-.

• The shuttle valve must rest lower than the opposing housing surface -arrow-. If this is not the case, then the remove the valve again and adjust the position of the ball.

-- Tighten the shuttle valve to the tightening specification -item 21- in  21.