Repairing air line

Information 

If a new air spring/new pressure control valve is to be installed, the VOSS threaded joint is already pre-fitted.

1. Raise the vehicle. → 4X00IN LIFTING THE VEHICLE
2. Bleed the relevant section using PIWIS Tester II 9818  . → 4301IN BLEEDING AND FILLING THE LEVELLING SYSTEM .
3. Loosen VOSS threaded joint -1-  on the defective air line -2-  from the relevant component (e.g. air spring/compressor).

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4. Loosen the cutting ring -1-  on the air line -3-  using a suitable tool.
5. Pull VOSS threaded joint -2-  off the air line -3-  .

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   Information 

   Pay particular attention to the following points when choosing the repair point:

   • The repair point must be in an area protected from water spray  .
   • Only straight line sections should be chosen for repairs. If a bent section of line is selected, this can result in leaks in the push-on connector  .
6. Cut off defective section of the air line with a straight cut using cutting pliers WE 1506  .

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   Information 

   Sharp edges at the end of the air line or at the point where the cutting ring is fitted can damage the newly fitted O-ring.

   For this reason, always de-burr the end of the air line.

7. De-burr the end of the new air line section using a suitable tool

   → De-burring air line  .

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8. Mark the new air line with a colored marking (e.g. using a water-resistant marker).

   Applies to end of hose on valve block:  Measured from the end of the hose, make two colored markings at 17 mm and 22 mm respectively.

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   Applies to end of hose on air spring:  Measured from the end of the hose, make two colored markings at 21 mm and 24 mm respectively.

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9. Check air line for soiling (e.g. dust particles) and clean it if necessary.

   Information 

   Insert air lines as far as they will go into the push-on connector.

10. Connect new air line section -1-  using the push-on connector -2-  to the air line installed in the vehicle -3-  .

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11. Insert air line -3-  as far as it will go into the VOSS threaded joint -2-  on the air spring/valve block -1-  .

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12. Check that the air line is fitted correctly:
    • Only one marking on the air line should be visible.
    • Pull the air line briefly against the insertion direction. If it cannot be pulled out, the air line is fitted correctly.
13. Fill the relevant section using PIWIS Tester II 9818  . → 4301IN BLEEDING AND FILLING THE LEVELLING SYSTEM .