Description

You know the signs – a bit of oil seepage around the valve cover or that telltale smell of burning oil when you’re out working. When your David Brown tractor starts showing oil leaks around the rocker cover, it’s time to replace that gasket before it gets worse and starts letting dirt into your engine oil. This gasket keeps everything sealed tight so your engine oil stays clean and where it belongs.

What You’re Getting

Precision-cut rubber gasket that fits your AD4/47, AD4/49, or AD4/55 engine perfectly
Quality 4.6mm thickness provides the right compression to seal against oil leaks
Heat and oil resistant material that won’t deteriorate from engine temperatures
Direct replacement – no modifications needed, just remove the old and install the new

Built for Real Farm Work

These David Brown tractors from the 990 through 1494 series are proven workhorses that handle everything from medium-duty cultivation and hay work to heavy tillage and loader operations. Whether you’re running a smaller 990 for specialty crops or putting a 1490 to work on serious field preparation, that engine needs to stay properly sealed.

Made to Last

Farm engines deal with constant heat cycles, vibration, and the pressure that comes from long days of hard work. This gasket is made from quality rubber compound that stays flexible even after thousands of hours of operation. The precise thickness ensures proper compression against both the rocker cover and cylinder head surfaces.

Installation Notes

Before installing the new gasket, clean both the rocker cover and cylinder head surfaces thoroughly – any old gasket material or oil residue will prevent a proper seal. Don’t over-tighten those cover bolts, especially on these older cast iron heads. Tighten gradually in a cross pattern until the gasket compresses evenly.