Note that in severe conditions the air filter element should be cleaned, blowing from the top surface downwards with a blast of compressed air and removing any large particles of dirt with a soft-bristled brush, at the minor service interval. At the major service interval the element should be removed as described in Chapter 5 - Fuel & Oil and discarded.
Fit a new element, ensuring that it is seated correctly, as described, and secure the filter top half by springing the retaining clips into place. A light application of grease around the sealing edges will help provide a good seal in very wet or dusty conditions.
Next Section: 7. Check the cooling system
Filter casing top half is secured by spring clips
Ensure air filter element is correctly refitted to prevent entry of dirt into engine