Description

When your David Brown tractor starts running hot or you see coolant pooling under the engine, it’s time for a new water pump. These 1970s and early 80s tractors were built tough, but after decades of farm work, that original pump has likely given all it can give. This flush pulley design sits flat against the housing – the exact style your tractor needs to keep everything aligned and running cool.

What You’re Getting

Flush pulley design that sits flat for proper belt alignment on your specific serial number range
Complete assembly with single groove V-belt pulley and all mounting gaskets included
Built for AD4/49 and AD4/55 four-cylinder diesel engines that power these workhorses
Six-bolt mounting pattern gives you a rock-solid connection to the engine block
Precision-engineered impeller moves coolant efficiently through the whole system

Built for Real Farm Work

Your David Brown – whether it’s a 990 Selectamatic with that handy three-point control or a bigger 1200 series doing loader work – generates serious heat that needs managing. These tractors were the backbone of British and European farms for good reason, handling everything from cultivation to hay production. The cooling system keeps that reliable four-cylinder diesel running at the right temperature so you can keep working.

Made to Last

Farm equipment takes a beating, and water pumps work especially hard circulating coolant under pressure and heat. This pump uses heavy-duty construction that matches what David Brown originally installed, with quality seals and bearings designed to handle the constant duty cycle of agricultural work.

Installation Notes

This is a direct replacement for several part numbers, so check your serial number first – different ranges need different pulley styles. If your tractor needs the protruding pulley instead, you’ll want a different part. Plan on a half day for the job including draining and refilling the cooling system, and always replace that mounting gasket while you’re at it.