Installing Front Spring Strut

→ Wear personal protective gear.

→ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).

→ Wear personal protective gear.

→ Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).

Information 

• Visually inspect all parts. 
• If a new spring strut is fitted, it must be pre-filled to 3 bar in its original packaging → Filling specification for air-spring strut. 
• Replace self-locking nuts. 
• Replace all expansion screws (screws which are fitted with torque angle tightening procedure). 
  • The entire threaded parts of the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on the wheels or the wheel suspension being raised using a universal vehicle lift. Dimension -X-  , from lower edge of wing to middle of axle 502 mm ± 10 mm corresponds to vehicle position. 
    Fig 1: Identifying Mark On Vehicle Position

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• Use an intermediate layer → see Fig 2(hard rubber). Do not damage the brake cover plate. 
  Fig 2: Positioning Wheel Carrier On Brake Cover Plate

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• When fitting the ball joints, ensure that the bevel pinions are clean! Remove dirt or grease on bevel pinions, e.g. with a lint-free cloth. Do not use cleaning agent/solvent. 
• Observe correct tightening torques. → Tightening torques for front axle 

1. Carefully guide in spring strut -arrow-  , position with the auxiliary pins and tighten at the mounting saddle with the specified tightening torque → WM 4300TW TIGHTENING TORQUES  .
   Fig 3: Guiding Spring Strut

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2. Fit drive shaft. To do this, first fitter must carefully pull the top of the wheel carrier outwards and the second fitter must carefully guide in the drive shaft.
3. Fit brake calliper on wheel carrier (do not tighten brake calliper fastening screws yet).
4. Mount wheel carrier on upper trailing arm. When doing this, observe drive shaft clearance (use suitable base). To facilitate assembly and avoid the upper ball pin falling into the stop, raise the wheel carrier slightly with a suitable lift so that the upper ball pin can be inserted. Use a → see Fig 4 lift with rubber base in order to prevent slipping.
   Fig 4: Lifting Wheel Carrier Using Suitable Lifting Device

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5. Insert spring compressor VW 552  and slightly tension upper trailing arm.
   Fig 5: Identifying Spring Compressor VW 552 Turnbuckle

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6. Fit fastening bolt for lower spring strut. Remove spring compressor VW 552  turnbuckle.
7. Grease mounting-face ring of axle nut with a little Optimoly TA aluminium paste. Screw on axle nut to prevent shaft from slipping out. If the shaft cannot be pushed right in, use assembly fixture T10206  to pull the drive shaft in. Remove protective tube (shop made) 00000  and base.
   Fig 6: Identifying Assembly Fixture (T10206)

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8. Fit drive shaft to the transmission flange and tighten brake calliper fastening screw → WM 4300TW TIGHTENING TORQUES  .
9. Mount connecting link.
   Fig 7: Locating Brake Calliper Fastening Screw

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10. Connect compact connector in wheel housing -arrow-  . Mount support for brake hose/combination line on top of wheel carrier. Connect sensor connectors.
    Fig 8: Locating Sensor Connectors

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    Information 

    • Observe torque on residual pressure retaining valve. 
11. Fit pressure line at residual pressure retaining valve -(arrow)- using insert part T10212. Observe the correct tightening torque. → WM 4300TW TIGHTENING TORQUES 
    Fig 9: Locating Pressure Retaining Valve

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12. Mount ball joint of tie rod on wheel carrier. → see Fig 10 Tighten lock nut to specified tightening torque → WM 4300TW TIGHTENING TORQUES  .
    Fig 10: Identifying Ball Joint Of Tie Rod On Wheel Carrier

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13. Screw in plastic nuts -arrows-  on wheel housing liner.
    Fig 11: Identifying Plastic Nuts On Wheel Housing Liner

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