Spring Lock Coupling: Cleaning
- Fabricate a cleaning tool from a 1/8-inch diameter brazing rod.
- Cut an abrasive pad from maroon colored 3M Scotch Brite® with the dimensions corresponding to the coupling size.CLEANING
Coupling Size Pad Size 3/8 inch 25 x 50 mm (1 x 2 inch) 1/2 inch 25 x 50 mm (1 x 2 inch) 5/8 inch 25 x 76 mm (1 x 3 inch) 3/4 inch 25 x 102 mm (1 x 4 inch) - Assemble the pad to the tool.
- Coat the abrasive pad with PAG Refrigerant Compressor Oil (R-134a Systems) or equivalent.
- Roll the pad on the tool and install it in a variable speed drill motor.
- 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.
- Clean the fitting with a lint-free cloth.
- Inspect the surface for grooves or scratches. If grooves and scratches are still present, install a new component.
- Clean the O-ring seal grooves with a 300-mm (12-inch) length of natural fiber string.
- Loop the string around the grooves and pull the string back and forth.
- Remove any foreign material from the grooves with a lint-free cloth.
CAUTION:
Maintain low speed drill rotation when inserting or removing the cleaning tool to prevent axial scratches which may cause future leaks.