This service repair manual covers the Mitsubishi 4G63-32HL and 4G64-33HL engines, utilized in Hyundai Forklift Trucks (LPG Gas) models HLF 15-5, HLF 18-5, HLF 20-5, HLF 25-5, and HLF 30-5. These engines, part of the robust 4G6 family, offer reliable performance with displacements of approximately 2.0L for the 4G63 and 2.4L for the 4G64. Engineered for demanding industrial applications, these engines are designed for durability and efficient operation in various forklift tasks. This comprehensive English-language manual provides detailed information for the service, repair, assembly, and disassembly of these engines. It includes critical sections on diagnosing, servicing, technical maintenance, and troubleshooting, supported by real photo illustrations and schemes. Key areas covered encompass engine components such as the cylinder block, crankshaft, pistons, cylinder head, valves, timing belt, ignition system, cooling system, and lubrication system. Additionally, the manual features electrical and hydraulic diagrams, service specifications, tightening torques, sealant information, and special tool requirements, ensuring thorough understanding and effective maintenance for technicians and owners alike.