Pic. 12–5. Shock absorber elements: 1 - nut with collar, 50 Nm; 2 - spacer sleeve; 3 – the top support of a shock-absorber rack; 4 - washer; 5 - upper spring support; 6 - cylindrical spring; 7 - buffer; 8 - protective cover; 9 - protective cover; 10 - lower spring support; 11 - lower spring plate; 12 - shock absorber
Attach shock absorber (pic. 12–5) front suspension in a fixture fixed in a vice, and using the VAG 1752/6 special tool, compress the spring so that it moves away from the top of the strut. When using a special device for spring compression, the coils of the spring must be securely grasped and compressed from opposite sides of the spring.
Warning: The spring has a very high compression force, so use only a very reliable tool. Never tie the spring with wire.
Pic. 12–6. Unscrewing the central nut of the shock absorber rod
After securing the shock absorber rod from turning with a wrench, use another ring wrench or a special key 3353 to unscrew the central nut of the shock absorber rod (pic. 12–6).
Remove the spacer, upper shock absorber mount, washer, and upper spring seat from the shock absorber rod.
Remove the spring together with the spring compressor.
Pic. 12–7. Protective cover location (1), spring support (2) and lower spring plate (3) on shock absorber
Remove protective cover 1 (pic. 12–7) and the lower spring seat 2. Using a plastic hammer, knock the lower spring plate 3 upwards.
Installation
When installing, it is necessary to use springs with the same technical characteristics on the same axle of the car (with the same color marking).
Check the shock absorber for fluid leakage. Check the entire length of the damper rod for pitting. Check the shock absorber housing for mechanical damage. Place the shock absorber in a vertical position and test its operation by moving the stem through its full travel and up and down by 50–100 mm. In all cases, the shock absorber rod should move smoothly, with perceptible resistance. If the shock absorber rod moves jerkily or there is mechanical damage, the shock absorber must be replaced.
Fix the shock absorber in a vice with soft jaws.
Pic. 12–8. The correct position of the hole when installing the lower spring plate on the shock absorber: 1 - the lower spring plate; 2 - shock absorber; And – an axis of a fork of the bottom fastening of the shock-absorber; B - clamps
Install the lower spring plate on the shock absorber so that the hole in the spring plate is perpendicular to the hole in the lower shock mount yoke, while the clips should be located on the side of the hole (pic. 12–8). The deviation of the center of the hole in the lower plate of the spring from the vertical must be no more than±2°.
Install the lower spring seat and guard.
Pic. 12–9. The correct location of the lower coil of the spring in the plate
Install the coil spring so that its lower end is correctly located in the lower spring plate (pic. 12–9).
Install the upper spring plate in such a way that the axis passing through the mounting threaded posts is parallel to the axis of the lower mounting of the shock absorber strut. A deviation of no more than±2°is allowed.
While holding the shock absorber rod from turning, screw on a new shock absorber rod collar nut and tighten it to 50 Nm (see fig. 12–6).
Carefully remove the spring compressor.
Pic. 12–10. The correct location of the upper coil of the spring on the shock absorber strut
Check that the upper coil of the spring is correctly located on the upper spring plate (pic. 12–10).
Install the shock absorber to the vehicle.
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