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Spring Lock Coupling: Cleaning

  1. Fabricate a cleaning tool from a 1/8-in diameter brazing rod.
    Fig 1: Identifying Brazing Rod Diameter
    G04653707Courtesy of FORD MOTOR CO.
  2. Cut an abrasive pad from maroon colored 3M Scotch Brite® with the dimensions corresponding to the coupling size.
    COUPLING SIZE AND PAD SIZE

    Coupling Size Pad Size
    3/8 in 25 x 50 mm (1x2 in)
    1/2 in 25 x 50 mm (1x2 in)
    5/8 in 25 x 76 mm (1x3 in)
    3/4 in 25 x 102 mm (1x4 in)
  3. Assemble the pad to the tool.
    Fig 2: Identifying Pad
    G04653708Courtesy of FORD MOTOR CO.
  4. Coat the abrasive pad with PAG oil.
  5. Roll the pad on the tool and install it in a variable speed drill motor.
    6. CAUTION: Maintain low speed drill rotation when inserting or removing the cleaning tool to prevent axial scratches which may cause future leaks.
    Fig 3: Identifying Rolling Pad On Tool
    G04653709Courtesy of FORD MOTOR CO.
  6. Polish for one minute at moderate speed (less than 1,500 RPM) or until the surface is clean and free of scratches or foreign material.
  7. Clean the fitting with a lint-free cloth.
  8. Inspect the surface for grooves or scratches. If grooves and scratches are still present, install a new component.
  9. Clean the O-ring seal grooves with a 300 mm (12 in) length of natural fiber string.
    • Loop the string around the grooves and pull the string back and forth.
      Fig 4: Looping String Around Grooves
      G04653710Courtesy of FORD MOTOR CO.
  10. Remove any foreign material from the grooves with a lint-free cloth.
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