Solutions Product FAQ Support Find Us Language Calculator Contact Us FREQUENTLY ASKED QUESTIONS All Operation Maintenance & repair Ownership Mounting & vehicle design Operation How often does the coupling need to be lubricated? Which lubricant should I use for the coupling? What does the warning sign on the coupling mean? How can I check for faults on a coupling? Go to Operation Maintenance & repair What servicing does my coupling require? Can I repair a broken coupling myself? How can I check which coupling is fitted to the vehicle? Can I get spare parts for older couplings? Where can I find spare parts for the coupling? Go to Maintenance & repair Ownership How do I know that a coupling has sufficient performance? How long is the service life of a coupling? Which coupling should I choose? Where can I find prices? Do I dare to buy a used coupling? Go to Ownership Mounting & vehicle design Are there any special requirements for the mounting position of the underrun protection? Can a protective beam from another supplier be mounted with ringfeder end plates? Is it permitted to drill into or weld the underrun protection? What info does the type approval plate contain? Can I have outline marking on the protective beam? Go to Mounting & vehicle design Explore Ringfeder Solutions Products FAQ Support Find us How can we help you? I want to buy I need spare parts I need technical support Other questions Follow us Combined Shape Created with Sketch. Cookies Privacy Imprint GTC VBG Group Truck Equipment GMBH | Girmesgath 5 | D-47803 Krefeld FAQ Talk to an expert