NUFFIELD UNIVERSAL 3 THREE 4 FOUR TRACTOR WORKSHOP SERVICE MANUAL (PDF format) This is a comprehensive workshop manual issued by Nuffield to their workshop dealers and technicians. It is suitable for the home workshop mechanic or professional technician. This manual will help you restore and maintain your Nuffield Universal Tractor just like professional mechanic. Very easy step by step instructions with lots of diagrams and photos. TABLE OF CONTENTS Introduction General Data General Information Engine (Type OEC, Three-cylinder Diesel) Cooling System Fuel System Clutch .. Gearbox and Transmission Steering Gear Front Axle Wheels and Tyres Braking System Electrical System Lubrication Optional Equipment