Disassembling spring strut

CAUTION: The air-spring strut is pressurised with approx. 3 bar residual pressure. Never us an impact bolter to loosen the fastening screws. Do not bend over the mounting saddle during disassembly.

Risk of injury from the pressurised air-spring strut when loosening the screws.

→ Always unscrew the screws on the mounting saddle by one turn only, on alternating sides. During disassembly, allow the air to escape by tilting the mounting saddle slightly.

Fig 1: Lower mounting point for air-spring strut

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1. Clamp the air-spring strut on the lower mounting point (use aluminum protective jaws -A- !). See Fig 1.

2. Loosen the fastening screws on the mounting saddle and carefully remove the mounting saddle.

Fig 2: Removing/fitting spring-strut mount

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3. Remove spring-strut mount with socket wrench insert 3353 and arm bracket P 9630.

Fig 3: Air-spring strut clamp

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4. Remove clamp.

NOTE: When replacing the air spring, always replace the boot/bellows.

If the rolling piston slips out of the outer guide during disassembly, it must be correctly positioned again when assembling.

When sliding in the rolling piston, the roller must lie evenly between the outer guide and rolling piston (roll fold).

Fig 4: Air-spring strut rolling piston

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5. Push bellows downward and secure in this position (2nd worker required!). Grasp rolling piston -1- and remove it upward from the shock absorber by turning slightly to the left/right. See Fig 4.

Fig 5: Rubber stop

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6. When replacing the air spring, push the rubber stop -1- out of the centring device. See Fig 5.

7. Remove boot/bellows.

Fig 6: Wheel acceleration sensor

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8. When replacing the shock absorber, remove the wheel acceleration sensor -1- and fit it on the new shock absorber. See Fig 6.