This document provides workshop instructions for Perkins Peregrine and New Generation 1300 Series diesel engines models WD to WJ. It contains specifications, diagrams, and step-by-step instructions for disassembly, inspection, repair and reassembly of engine systems including the cylinder head, pistons, crankshaft, timing gears, fuel system and other components. The document is published by Perkins Engines Company Limited and copyrighted in 1998.