Técnicas especiais de reparo

501-25-57 Body Repairs - General Information 501-25-57 DESCRIPTION AND OPERATION ‡ NOTE: Additional information on welding can be found in the section Welding Equipment and Joining Techniques. High-power welding equipment for panel thicknesses in overall combination of up to 6 mm total material thickness. ‡ The fitting accuracy and longitudinal rigidity of the affected component is especially important to ensure that the doors, door windows and the roof fit and close correctly. Liquefied gas vehicles Alternative fuel vehicles often require special handling in the workshop area. Above all, assembly operations to some extent require particular knowledge when dealing with the special technology and the safety regulations. NOTE: Only fully trained personnel are permitted to work on alternative fuel vehicles. These special requirements must be understood and taken into account in the body shop as well. CAUTION: Danger of fire and explosion. The safety instructions must always be followed when performing service work on fuel/gas systems. Failure to follow these instructions may result in personal injury. NOTE: You will find further information about working on liquefied gas vehicles in the section Health and Safety Information. Refrigerated conversion vehicles Apart from the special materials used in building the structure of the refrigerated compartment, such vehicles have special energy and refrigeration systems which require special handling during repair. CAUTION: Danger of injury. Work on the 230<SP>volt system of the refrigeration equipment must only be carried out by trained specialist personnel. NOTE: Work on the refrigerant circuit may only be performed by persons who have a relevant certificate of competence. Vehicles with a refrigerated compartment are often used to transport foodstuffs. For this reason, additional hygiene regulations must be complied with during repair work. Aluminum and plastic are used to construct the two different types of compartment found on refrigerated vehicles. The aluminum conversion is a very stable and technically perfect variant. However, against this the relatively high production costs and a lower payload must be taken into account, because of the weight of the aluminum conversion itself. NOTE: Basic and in-depth training is offered on the following topics. You will find an overview of the complete range listed in the Training brochure published by the Ford Service Organization. The plastic conversion has developed into a light, clean and economical alternative because of constant further development of materials and working techniques. NOTE: The material combinations, the workmanship and the working methods must comply with the current food hygiene regulations. For this reason, service and repair work on the refrigerated conversion may only be performed by authorized and specially trained technicians. Refrigerated compartment constructions are often made using both materials. The floor pan is made of structured, slip-proof aluminum panels and the wall and ceiling cladding is made of smooth surfaced plastic elements. CAUTION: PUR hard foam is flammable. If PUR hard foam is overheated, it will burn on its own with a brilliant yellowish flame. It produces unpleasant choking and toxic fumes. Special measures must be taken when welding the vehicle body. Polyurethane wall and ceiling elements are manufactured using a sandwich principle. An insulating polyurethane core is coated with food grade ABS plastic on one side. PUR hard foam does not decompose, is rot resistant and is odorless. These properties make it suitable for use as insulation. Because of its closed cell structure, water uptake by PUR hard foam is for the most part only a problem at edges. Cut edges or other mechanically worked surfaces must however be sealed with the greatest care. The conversion to a refrigerated vehicle is performed as made-to-order production. The large surfaces of the wall and ceiling cladding can be changed and are particularly easy to repair. If access to the back of a body panel section is needed because of body straightening work, in