Power Steering Components: Description and Operation
Power Steering Components
=> [ Power Steering Components Overview ]
=> [ Power Steering Pump Assembly Overview ]
Power Steering Components Overview
The power steering pump is not designed to be serviced. If a customer has reported a problem, determine the cause via a pressure test and leak test. If there is a malfunction, replace the pump.
• If the fluid is low in the reservoir, always check the steering system for leaks.
• If there are leaks in the area of the line connections, the lines/connections must first be inspected for leaks, tightened as necessary and wiped dry.
• The pump is delivered without fluid. Therefore, the pump must be filled with hydraulic fluid before installation and turned by hand. Otherwise, noises when driving or damage to the pump may occur.
1 Power Steering Gear
2 Pressure Line
3 Return Hose
• Follow the installation of the return hose/pressure line in the front longitudinal member area.
• Follow the assembly on the front end.
4 Clamp
• tension using the hose clamp pliers (VAG 1275) or locking pliers (VAS 6199).
• Always replace.
5 Check Valve Clamp
• Do not use hose clamps up to 25 mm dia. (3094) in the check valve area.
6 Return Hose
• Between the reservoir and hydraulic oil cooler.
• Installed position on the reservoir and hydraulic oil cooler. Refer to => [ Suction and Return Hoses, Installed Position ] Power Steering Components.
7 Cap with Dipstick
8 Bolt, 9 Nm
9 Rubber Bushing
• For the reservoir.
10 Reservoir
• Fill with hydraulic fluid when filling.
• Insert the reservoir in the bracket.
11 Suction Hose
• Installed position on the reservoir, refer to => [ Suction and Return Hoses, Installed Position ] Power Steering Components.
• Note the power steering pump location, refer to => [ Suction and Return Hoses, Installed Position ] Power Steering Components.
12 Clamp
• Tension using the hose clamp pliers (VAG 1275) or locking pliers (VAS 6199).
• Always replace.
13 Bolt, 9 Nm
14 Bracket
• For the reservoir.
15 Cover
16 Bolt, 9 Nm
17 Hydraulic Oil Cooler
18 Bolt, 9 Nm
19 Pressure Line
• Securing on the engine.
20 Power Steering Pump
• Fill with hydraulic fluid before installation.
• Checking delivery pressure, refer to => [ Power Steering Pump, Checking Delivery Pressure ] Testing and Inspection.
• Removing and installing, refer to => [ Power Steering Pump ] Power Steering Components.
21 Bolt
• Tightening specification, refer to - item 3 - in => [ Power Steering Pump Assembly Overview ].
22 Bolt
• Tightening specification, refer to - item 6 - in => [ Power Steering Pump Assembly Overview ].
23 Union Nut, 40 Nm
24 Banjo Bolt, 47 Nm
25 Seal
• Always replace.
26 Pressure Line
• Follow the assembly in the front longitudinal member area. Refer to => [ Suction and Return Hoses, Installed Position ] Power Steering Components.
27 Check Valve
• Pressed into the pressure hose - item 2 -.
28 Union Nut, 45 Nm
Securing the Pressure Line to the Engine
- Secure the pressure line - 1 - to the lower left of the engine using bolt - 2 -.
Follow the Installation of the Pressure Line/Return Hose in the Front Longitudinal Member Area
- Insert the bracket - 1 - in the pressure line opening - 2 -.
- Secure the cable ties - 4 - on the bracket - 1 - and guide bushing - 3 -.
Securing the Return Hose on the Front End
- Align the return hose - 2 - with the chafe protector - 1 - centered to the edge of the lock carrier.
- Secure the return hose - 4 - on the longitudinal member using cable ties - 3 -.
Bracket/Reservoir Installed Position
The bracket - 4 - with the reservoir is located near the level control system air supply unit - 2 -.
1 Bolt, 9 Nm
3 Washer (only for the front bolt)
To replace the reservoir, remove the following parts:
• Left front section of the front wheel housing liner.
• Left air filter.
• Bring the lock carrier into the service position. Radiator Support
Installing the Reservoir into the Bracket
- Insert the reservoir - 1 - with the rubber bushings - 4 - into the bracket - 3 -.
- Tighten the bolt - 2 - to 9 Nm.
Power Steering Pump Assembly Overview
• Always replace the seals.
• Do not reuse the fluid you have drained.
• Only use hydraulic fluid.
• When replacing the power steering pump, replace the pump seal and O-ring. Refer to => [ Power Steering Pump Seal and O-ring ] Power Steering Components.
1 Power Steering Pump
• Fill with hydraulic fluid before installation.
• Checking delivery pressure, refer to => [ Power Steering Pump, Checking Delivery Pressure ] Testing and Inspection.
• Removing and installing, refer to => [ Power Steering Pump ] Power Steering Components.
2 Bracket
3 Bolt
• Transmission/engine/bracket/power steering pump bolt.
4 O-ring
• Replacing, refer to => [ Power Steering Pump Seal and O-Ring ] Power Steering Components.
5 Radial Shaft Seal
• Replacing, refer to => [ Power Steering Pump Seal and O-Ring ] Power Steering Components.
6 Bolt, 22 Nm
7 Banjo Bolt, 50 Nm
8 Seal
• Always replace.
9 Pressure Line
• Note the installed position: Angle between line connection and pump axle is approximately 41 degrees.
10 Clamp
• Tension using the hose clamp pliers (VAG 1275) or locking pliers (VAS 6199).
• Always replace.
11 Suction Hose
• The - P - marking on the suction hose must align with the seam on the power steering pump.