Xinchai 490B-340100 High-Efficiency Diesel Breather — 98% Oil Separation, 3-5T Forklifts and Agricultural Equipment

This is the Xinchai 490B-340100 high-efficiency diesel engine breather (also called respirator or crankcase ventilation assembly) — featuring 98% oil separation efficiency for Xinchai 490B diesel engines in 3-5 ton forklifts and agricultural tractor applications. The 98% oil separation rating means this breather captures and returns nearly all oil mist from the blow-by gas stream to the crankcase, dramatically reducing oil consumption through the ventilation system and preventing oily residue buildup in the intake manifold and intercooler. A standard breather typically achieves 70-85% separation — the 490B-340100’s high-efficiency design means less oil topping-up between service intervals, a cleaner intake tract, and reduced visible exhaust smoke from oil entering the combustion chamber through the breather/PCV system. A clogged or underperforming breather causes the opposite: crankcase pressure builds, oil is forced past the front and rear crankshaft seals (the most expensive seals to replace on any engine), and the intake manifold accumulates oily carbon deposits that restrict airflow and reduce engine performance.

XinChai brand with 23 years of modification experience. Iron/plastic construction, direct adaptation fit. 1kg. 3-month warranty with online guidance service. Box packing for safe shipping. Manufactured in Shanxi, China. Diesel engine type, respirator classification, purpose: repair/replacement/modification. When replacing the breather, clean the breather hose or tube connecting to the intake manifold — accumulated oil sludge in the old hose will re-clog a new breather within hours of installation. Inspect the hose for cracks, collapse, or kinking — a collapsed breather hose blocks crankcase ventilation just as effectively as a clogged breather and will cause the same seal-blowing crankcase pressure buildup. The breather is accessible from the top of the engine on the valve cover, making it a quick replacement item during routine oil change service intervals.

Compatible with Xinchai 490B diesel engines in 3-5 ton forklifts and agricultural tractors. Browse our breather selection for 4D35ZG31 and 495B variants. For engine specifications, visit Xinchai official website.

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