Cleaning and testing of trailer couplings/towing devices

Task definition:

Cleaning of Trailer coupling devices covered with dirt and grease in built-in condition to allow a visual inspection. Furthermore it has to be tested whether freshly pressed-in grease leaks from the bearing or the ball pin.




The components were cleaned in the assembled state at the carriage with B1200 from a pit. Very restricted space conditions and the collecting of the cleaning liquid do not make the job easy. After the first cleaning from the outside almost all grease and dirt could be removed. Furthermore the lubrication nipple at the coupling was removed and prepared for the holding of the ph-cleantec pistol by an adaptor. Thus the coupling pin could be rinsed from the inside with cleaning agent and hot water. Through this, most of dirt and grease was pressed out of the coupling from the inside.


By the towing device cleaned from the inside it could be tested whether and where the fresh grease leaks during lubrication. Without this possibility the complete towing device has to be disassembled/assembled; which causes an assembly time of approx. 8-9 hours.