Audi Q5: Hydraulic Control Unit, Disassembling and Assembling
Hydraulic Control Unit, Disassembling and Assembling, 0BE, 0BF
1 - Bolt
- 5 Nm
2 - All Wheel Drive Pump -V415-
- Removing and installing. Refer to → Chapter "All Wheel Drive Pump -V415-, Removing and Installing".
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 - Hydraulic Pump
- Consists of a guide ring, the housing and six pistons
- Assembling. Refer to → Fig. "Assembling the Hydraulic Pump"
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
- Tighten both nuts hand-tight when installing
8 - O-Ring
- Always replace.
9 - Oil Pressure/Temperature Sensor -G437-
- 10 Nm
- Brown connector
- Removing and installing. Refer to → Chapter "Oil Pressure/Temperature Sensor -G437- or Oil Pressure/Temperature Sensor 2 -G640-, Removing and Installing".
10 - Oil Pressure/Temperature Sensor 2 -G640-
- 10 Nm
- Black connector
- Removing and installing. Refer to → Chapter "Oil Pressure/Temperature Sensor -G437- or Oil Pressure/Temperature Sensor 2 -G640-, Removing and Installing".
11 - All Wheel Drive Clutch Valve 2 -N446-
- Color: brown
- Removing and installing. Refer to → Chapter "All Wheel Drive Clutch Valve -N445- or All Wheel Drive Clutch Valve 2 -N446-, Removing and Installing".
- Installed position, the connector faces upward toward the Oil Pressure/Temperature Sensor
Caution
Do not interchange with the All Wheel Drive Clutch Valve -N445-.
12 - All Wheel Drive Clutch Valve -N445-
- Color: black
- Removing and installing. Refer to → Chapter "All Wheel Drive Clutch Valve -N445- or All Wheel Drive Clutch Valve 2 -N446-, Removing and Installing".
- Installed position, the connector faces upward toward the Oil Pressure/Temperature Sensor
Caution
Do not interchange 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 - Guide
- Installation position, large diameter faced the ball -item 17-.
17 - Ball
- Insert into the guide before installing -item 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-.
20 - O-Ring
- Always replace.
21 - Shuttle Valve
- 8 Nm
- Removing and installing. Refer to → Fig. "Removing and Installing the Shuttle Valves".
22 - Seal
- With strainer
- 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
- Tighten both nuts hand-tight when installing
Assembling the Hydraulic Pump
- Install the six pistons -A- in the housing -B-.
- Install the guiding ring -C- so that the piston touches the collar -arrow-.
- Insert the hydraulic pump -1- with the guide ring -2- in the in the hydraulic control unit housing.
Function Test:
- Turn the hydraulic pump -1- several times. While doing so pay attention to the following:
- When turning the hydraulic pump must not become hooked or tilted.
- All pistons must be removed and pressed in.
Removing and Installing the Shuttle Valves
Note
Remove the All Wheel Drive Pump -V415-, hydraulic pump and ball bearing -item 6- beforehand.
- 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-.
