The procedure for replacing the water pump on a Massey Ferguson 165 tractor will vary depending on the model, but some of the basic steps remain the same.
1. Drain the coolant by locating the drain plug and removing it. If there are no drains, you will need to remove the radiator to drain the coolant.
2. Remove the fan belt, fan and shroud.
3. Unbolt the water pump from the engine block and discard the gasket.
4. Clean the mounting surface of the engine block with a wire brush to remove all dirt and debris.
5. Coat the new gasket with a light coat of engine oil and install it, then mount the new water pump.
6. Reinstall the fan, belt, and shroud.
7. Refill the cooling system with fresh coolant.
8. Start the engine and check for leaks.
Finally, make sure to check the fluid levels, hoses, and radiator before operating the tractor.