Spain – Repair and maintenance services of rolling stock – Intervención de mantenimiento R3 en enganches automáticos y semipermanentes de unidades de la serie 4300 de Metrovalencia.

To comply with the maintenance plan established for the 4300 series units of Metrovalencia, it is necessary to carry out the R3 type intervention on both automatic and semi-permanent couplings. To perform this type of intervention, it is necessary to disassemble the equipment and carry out maintenance consisting of replacing the maintenance kit supplied by the manufacturer of the couplings and also performing a series of tests and trials that will ensure the equipment continues to meet the standards of safety and reliability as it has done until now and until the next major intervention.