6.4.2 Maintenance and repair

These engines need specialist maintenance, so their large-scale use should be restricted to areas with qualified mechanics, able to service the equipment. 

In extensive areas of small farms, mobile workshops are an effective way of assisting users who would otherwise have difficulty in transporting their equipment to a central workshop. 

One of the most common problems relates to formulation hoses and their joints. 

Some chemical formulations cause hoses to expand so that they leak: operators (or local stockists) are advised to keep spares of these parts, together with hose clips.