Procedure

  1. Let the components cool down before you start working on the unit.
  1. Depressurize the water cooling cartridge and the connected system pipes. Shut them off with the corresponding valve.
  2. Completely drain the gear unit oil prior to disassembly.
  3. NOTICE! Risk of contamination due to drained media. Possible environmental damage. When draining the media, they must not get into the soil or the sewer system. They must be collected and disposed of in secured containers in accordance with the applicable environmental regulations.
  4. Disconnect the cooling water supply and return from the water cooling cartridge. Drain all the cooling medium.
  5. Only loosen the water cooling cartridge via the hexagon on the tube bottom and remove it.
  1. NOTICE! The sealing surfaces must not be damaged. Possible damage to property. Damage to the sealing surfaces can result in leakage.
  2. Remove the flat gasket. Remove any gasket residues from the sealing surfaces.
  3. Clean the water cooling cartridge.
    NOTICE! Risk of corrosion due to scratches. Possible damage to property. Use a brush with soft bristles for cleaning the inside.
    The following measures are recommended for cleaning:
    • A mixture of 50% hydrochloric acid with inhibitors and 50% water can be used to remove lime deposits on the inside of the pipe.
    • The inner cleaning of the tube bundle can be done with a brush at a Ø of the pipes of > 5 mm. Make sure that you use a brush with soft bristles so that the surface of the pipe walls is not scratched.
    • Contact SEW-EURODRIVE if you plan to remove scale deposits using other cleaning agents.
    • After cleaning, make sure all cleaning agents have been removed completely from the pipes before taking the water cooling cartridge into operation again.

 

  1. Coat 2 threads with LOCTITE® 577 and screw the water cooling cartridge only via the hexagon to the tube bottom.
  2. Re-connect the water cooling inflow and return pipes to the water cooling cartridge.
  3. Pour in new oil of the same grade through the oil fill opening.
  • Use a clean filling aid without zinc coating (plastic funnel or similar).
  • The oil quantity specified on the nameplate is an approximate quantity. The markings on the oil dipstick or the oil level glass are the decisive indicators of the correct oil quantity, see chapter Checking the oil level.
  1. Before restarting the system, vent the pipes.
  1. Check the tightness.