Get Service Information on your Tractor - Save Time & Money!Leyland 154 Tractors. Bmc Mini Tractors. Nuffield Mini Tractors. This Service Manual has detailed illustrations as well as step by step instructions. It is this level of detail, along with hundreds of photos and illustrations, that guide the reader through each service and repair procedure. ‘Synchro’ Transmission Test – In 1978 a ‘Servi..