Yanmar 4TNE94 Cylinder Block 729900-01560 — Komatsu Forklift FD20/30-14, MANON Brand, 85kg

This is the Yanmar 4TNE94 diesel engine cylinder block (part number 729900-01560, cross-reference YM729901-01560), manufactured by MANON for Komatsu and Yanmar forklift applications. The 4TNE94 is a 3.1L 4-cylinder industrial diesel engine from Yanmar’s TNV series — one of the most widely used engine platforms in Komatsu forklifts (FD20 and FD30 series, 2-3 ton class) and compact construction equipment. The cylinder block is the structural core of the engine: it houses the precision-machined cylinder bores, the line-bored crankshaft main bearing saddles, the camshaft bore, the pressurized oil distribution galleries, and the water jacket cooling passages. This block is the 4TNE94-specific casting — its external dimensions, mounting boss locations, and internal passage routing are unique to this engine model and cannot be interchanged with other Yanmar TNV blocks (like the 4TNV98 or 3TNE84) without significant modification. A cracked or damaged block on a 4TNE94 engine most commonly results from freezing damage (water expands 9% when frozen, splitting the thinnest water jacket walls), overheating that warps the cylinder head deck beyond the maximum allowable flatness, or a catastrophic connecting rod failure that punches through the cylinder wall.

This MANON brand block is manufactured in Guangdong, China with CE and ISO9001 certification. New condition. 85 kg net weight, 90 kg gross shipping weight (67×46×56 cm carton box). High quality with fast delivery. Used for Komatsu and Yanmar forklifts, applied model FD20/30-14. The 4TNE94 uses a gear-driven timing system — the camshaft is driven directly by gears from the crankshaft, eliminating timing belt maintenance but requiring precise gear alignment during engine assembly. When installing a replacement block, the cylinder bores must be measured for out-of-round (maximum 0.01mm), the main bearing saddles checked for alignment and diameter, and the cylinder head deck surface verified for flatness across the full length. All oil gallery plugs must be confirmed installed and tight — a missing or loose gallery plug causes immediate oil pressure loss on startup. Replace all bearings, seals, gaskets, and piston rings when transferring components to the new block.

Compatible with Komatsu FD20 and FD30 series forklifts (FD20/30-14) using Yanmar 4TNE94 diesel engines. Also fits Yanmar-powered forklift and industrial equipment using the 729900-01560 block specification. Browse our cylinder block selection for Toyota and Xinchai platforms. For engine specifications, visit Yanmar official website.

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