A/C Spring Lock Coupling: Cleaning

Fabricate a cleaning tool from a 1/8 inch diameter brazing rod.

Fig 1: Fabricating Cleaning Tool From 1/8 Inch Diameter Brazing Rod
Courtesy of MAZDA MOTORS CORP.
Cut an abrasive pad with the dimensions corresponding to the coupling size.

Fig 2: Cutting Abrasive Pad Correspond To Coupling Size
Courtesy of MAZDA MOTORS CORP.
Assemble the pad to the tool.

Fig 3: Assembling Pad To Tool
Courtesy of MAZDA MOTORS CORP.
Coat the abrasive pad with R-134a refrigerant oil.
Roll the pad on the tool and install it in a variable speed motor drill.

Fig 4: Installing Pad In Variable Speed Motor Drill
Courtesy of MAZDA MOTORS CORP.
CAUTION:
- Maintain low speed drill rotation when inserting or removing the cleaning tool to prevent axial scratches which may cause future leaks.
Polish for 1 minute at moderate speed (less than 1500 RPM) or until the surface is clean and free of scratches or debris.
Clean the fitting with a lint-free cloth.
Inspect the surface for grooves or scratches. If grooves and scratches are still present, replace the component.
Clean the O-ring grooves with a 300 mm (12 inch) length of natural fiber string.
1. Loop the string around the grooves and pull the string back and forth.
Fig 5: Cleaning O-Ring Grooves
Courtesy of MAZDA MOTORS CORP.
Remove any debris from the grooves with a lint-free cloth.