Reinforced Engineering Plastic with Integrated Seal & Mounting Hardware. QSF3.8 Diesel Engine. Excavator, Crawler Dozer, Crawler Loader, Skid Steer Loader, Tractor, Mining Truck, Backhoe Loader. Cylinder Head / Valve Train. Engineered for heavy-duty Cummins QSF3.8 diesel engine operation, withstands high temperature, pressure fluctuation and harsh construction & industrial working conditions. Precision manufactured to strict OE dimensional tolerances, ensures perfect sealing fit and direct interchangeability with the original valve cover assembly. Direct bolt-on installation with included mounting hardware, no special tools or modification required, minimizes engine downtime during repair service. Encloses and protects the valve train assembly, retains engine lubricating oil and blocks dust, debris and contaminants from damaging internal engine components. This engine valve cover matches OEM part number 4946240, designed for Cummins QSF3.8 series industrial diesel engines widely installed in construction, mining and agricultural heavy equipment. It serves as the protective upper housing for the engine valve train assembly, provides reliable sealing for the cylinder head, retains lubricating oil inside the engine crankcase and prevents ingress of dust, water and abrasive contaminants from work sites to protect internal valves, rocker arms and vital engine components from premature wear and corrosion damage. Compatible with a full range of heavy duty equipment including excavator, crawler dozer, crawler loader, skid steer loader, tractor, mining truck and backhoe loader.