K961162 New Tractor Water Pump for David Brown 850 880 890 950One New Aftermarket Replacement Water Pump for David Brown 800 and 900 Series Tractors This aftermarket replacement water pump fits David Brown 800 and 900 series tractors equipped with the AD4 55 or AD4 40 four cylinder diesel engine. The water pump circulates coolant through the engine's cooling system to maintain proper operating temperature and prevent overheating. A gasket is included for mounting. Compatible Engines David Brown AD4 55 David