Assembly overview: Power steering/fluid circuit for 8-cylinder petrol engine — AUDI

General information

Servicing of vane pump is not envisaged. In the case of complaints, determine the cause by means of a pressure test and leak test. If a fault is detected, replace the vane pump.

Notes:

Check steering system for leaks if there is a lack of fluid in the reservoir.
If a leak is found in the area of the pipe connections, first check pipes/pipe connections for leaks, re-tighten if necessary and wipe dry.
Replacement pumps are not filled with fluid. Prior to installation these must always be filled with hydraulic fluid G 002 000 and cranked by hand to avoid possible noise whilst driving or pump damage.
Type of fluid: Hydraulic fluid G 002 000

With the exception of the continuation of the hydraulic system pipes from left to right on the steering box and the threaded connection between pressure line/expansion hose on the longitudinal member, the fluid circuit of RHD vehicles corresponds to that of the LHD version.

When fluid circuit has been opened always:

Check all unions for leaks, start engine and perform visual inspections.
Check fluid level =>Page
48-144

Power-assisted steering box
Assembly overview:

Left-hand drive => Page
48-35
Right-hand drive => Page
48-114

Servicing => Page
48-109

Heat shield for steering damper =>Page
48-174
, Item
30
.

Sealing ring
Always replace

Expansion hose
Leads to steering box

Banjo bolt, 40 Nm
With integrated non-return valve

Sealing ring
Always replace

Banjo bolt, 47 Nm
Return hose
Leads to steering box

Expansion tank
Refilling with hydraulic fluid, Part No. G 002 000, filling quantity 1.2 litres
Plugged into hydraulic unit bracket
Check fluid level =>Page
48-144

Clip
Always replace
Tensioning => Page 48-113
Can also be replaced by screw-type hose clamp

Clip
Always replace
Tensioning => Page 48-113
Can also be replaced by screw-type hose clamp

Bonded rubber bush
Retaining plate
Note correct installation position:

Solid rubber faces towards hose

Retaining clip
Hexagon nut, 5 Nm
Return hose
Fluid cooler - expansion tank

Combi bolt, 10 Nm
Hydraulic fluid cooler
Two versions with varying routing of lines

Vane pump
Check delivery pressure
=> Page
48-223
Removing and installing
=>Page
48-229

Sealing ring
Always replace

Banjo bolt, 50 Nm
Suction hose
Banjo bolt, 47 Nm
Radiator
Strainer for expansion tank
Clean using solvent

Cap with dipstick
Check fluid level =>Page
48-144