Semi-automatic hitches facing new machine ban

Production of semi-automatic quick hitches for use on excavators and backhoes working in the EU is to be banned under proposed changes to EN474 that form part of the revised machinery directive expected later this year or early in 2009.

Following four deaths last year caused when items became detached from semi-automatic quick hitches, the Health & Safety Executive (HSE) is determined to stop new machines being fitted with couplers that can be activated hydraulically from inside the cab, but require the operator to leave the cab to activate or install a safety mechanism.

Under the proposals, quick couplers with a powered mechanism to attach and retain the bucket must have an automatic device that prevents the attached item from falling off in the event of a loss of hydraulic pressure.

There must also be an indicator, viewable from inside the cab, to show that the device is secure.

However, the HSE said it has no plans to ban existing semi-automatic quick hitches. Some argue that this could exacerbate the situation as fewer and fewer operators will be acquainted with semi-automatics and could make accidents even more likely.

There has been criticism of the Construction Plant Competence Scheme (CPCS) for failing to teach trainee excavator operators about quick hitches.

While such training will be included in the revised scheme to be announced very soon, CPCS chairman Trevor Gamble has said it would take many years to re-train operators already holding a ticket.