Massey Ferguson 148 Dynamo to Alternator Conversion Kit – 12V. A practical charging system upgrade for your Massey Ferguson 148 tractor. Replace the original dynamo charging arrangement with a modern alternator system using this aftermarket conversion kit. Suitable for owners carrying out electrical repairs, tractor restorations or charging system upgrades. Designed for compatible Massey Ferguson 148 tractors. Dynamo to alternator conversion. Modern alternator-based charging arrangement. Suitable for restoration and routine maintenance projects. New aftermarket replacement kit. Please confirm that your tractor has a suitable original charging arrangement and that the supplied components match your installation requirements. Electrical modifications may be required during conversion. Installation by a competent mechanic or auto electrician is recommended. Why Choose BTH Agri? We supply replacement agricultural parts to help keep tractors and machinery working. UK-based agricultural parts supplier. BTH Agri – Keeping Your Machinery Working.