Applies to: N4+

Clean or exchange the coupling of the cooling liquid tank

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Cleaning the coupling of the cooling liquid tank

  1. Clean the cooling liquid tank and remove the cooling liquid filter.

    Exchanging the cooling liquid and cleaning the cooling liquid tank

    Replace carbon pellets

    2. NOTICE

    Damaging of the machine when improperly cleaning the cooling liquid coupling

    Internal components of the cooling liquid coupling can get lost during cleaning, which impedes the proper functioning of the coupling. Unscrewing the fixing nut can alter the position of the coupling and cause leakage.

    • Always open the cooling liquid coupling carefully and ensure that you do not lose any components during cleaning.
    • Never unscrew the fixing nut during cleaning.
  2. Unscrew the cap [1] of the coupling by hand. Do not the nut [6] that fixates the coupling to the tank.
  3. Remove the valve spring [2], ball [3] and valve seat [4] from the socket [5] and the cap [1] of the coupling.

    4.  

    1. Cap of the coupling
    2. Valve spring
    3. Ball
    4. Valve seat
    5. Socket of the coupling
    6. Fixing nut (do not unscrew during cleaning)
  4. Rinse the disassembled components of the coupling under running water and dry them with a cloth.
  5. Place the valve seat in the socket of the coupling.
  6. Place the spring in the cap of the coupling.
  7. Position the ball in the valve seat and screw the cap onto the socket of the coupling.

  8. Install the cooling liquid filter and refill the tank.

    Replace carbon pellets

    Filling the cooling liquid

Exchanging the coupling of the cooling liquid tank

  1. Empty the cooling liquid tank.
  2. While holding the coupling of the cooling liquid tank from the outside with one hand, unscrew the filter of the cooling liquid tank with the other hand.
  3. Put the filter aside.
  4. While holding the coupling of the cooling liquid tank from the outside with one hand, unscrew the nut with which the cooling liquid tank is fixated with the other hand.

    5.  

  5. Push the coupling out of the tank.

    6.  

  6. Thoroughly clean the cooling liquid tank. Especially clean the sealing surface around the opening for the coupling. Otherwise the cooling liquid tank may leak.

  1. Insert the spare coupling into the designated opening as shown in the following figure.

    2. NOTICE! Damage to the coupling due to premature tightening of the filter

  2. Screw down the nut onto the coupling by hand. Do not tighten the nut completely yet.

  3. Reinsert the cooling liquid tank until the tank is properly attached to the machine.
  4. Close the cooling liquid drawer.
  5. Open the cooling liquid drawer.
  6. Pull the cooling liquid tank out of the machine again.
  7. Tighten the nut completely and screw down the filter onto the coupling by hand.
  8. Fill new cooling liquid into the tank.
  9. Reinsert the cooling liquid tank until the tank is properly attached to the machine.