TRUCK COMPRISING A FUEL TANK SEALER CAP

A truck comprising a first fuel tank and a second fuel tank, arranged in fluid communication with the first fuel tank, and comprising a second orifice formed identically to a first orifice of the first fuel tank. A sealer cap is mountable to the second fuel tank for sealing the second orifice. The sealer cap comprises a cover plate and a tubular insert with a locking arrangement that is engageable with the second fuel tank by applying a sealing force in a sealing direction. The cover plate comprises a top surface provided with circular groove segments, each providing a contact surface that is accessible to apply the sealing force, and each providing a bottom surface that comprises an inclining wall section from a lower level inside the groove segment towards the top surface.