The 4 VD 14,5/12-1 SRW is an inline four-cylinder diesel engine produced by the VEB IFA Motorenwerke Nordhausen from 1967 to 1990. The engine was one of the standard modular engines for agricultural and industrial use in the Comecon-countries. Approximately one million units were made. Technical description The 4 VD 14,5/12-1 SRW is a water-cooled four-stroke diesel engine with four inline cylinders. The Fuel is injected with a mechanical direct injection system. The bore is 120 mm, the stroke is 145 mm, the displacement is 6560 cm³. The firing order is 1-3-4-2. The standard version of the engine produces 92 kW and has a torque of 422 Nm. The combustion chamber system (M-System) was licensed by MAN. The engine was produced in the versions 4 VD 14,5/12-1 SRW and 4 VD 14,5/12-2 SRW, the later revision was built primary for the NVA. The name 4 VD 14,5/12-1 stands for 4-Zylinder-Viertakt-Diesel, Hub 14,5 cm / Bohrung 12 cm, Baureihe 1, Stehend, Reihe, Wassergekühlt. (4 cylinders-four-stroke-diesel, stroke 14,5 cm / bore 12 cm, version 1, inline, water-cooled). Crankcase The crankcase is made of grey cast iron, both the crankshaft and the camshaft are supported in five bearings. The center bearing of the crankshaft is an axial bearing. The camshaft is driven by a connecting gear, which also drives the injection pump. The housing of the crankshaft bearing contains the housing of the oil pump. Some versions of the engine are equipped with a speedometer gear assembly, which is connected to the injection pump drive. Crankshaft, pistons and cylinders The engine has a forged crankshaft, supported in changeable thin-wall bearing shells. The journals of the crankshaft and the connecting rods are polished and induction hardened. The counter-weights are screwed on the center and outer crank arms. The flywheel is connected to the power take-off side of the engine with screws. The gear drive side of the crankshaft is equipped with a gear, which drives the oil pump and the gear which drives the camshaft. The connecting rods are forged and weight-balanced. While the small connecting rod bore has a bearing pressed into the bore, the crank-sided bore of the connecting rod has a thin-wall bearing. For lubrication and cooling of the connecting rods they have small oil-ducts. Oil is pressed in the ducts from a nozzle at the upper side of the connecting rod. The piston journals are secured with two circlips and