HOSE AS 3669623 - Caterpillar

Cleaning Primary Filter
Use all cleaning solutions with care.
1. Loosen the bolt (1) on the filter cover and lower the filter case (3).2. Remove the element (2). Wash the cover and element in clean, nonflammable solvent.3. Reinstall the element into the case.4. Install the element and case onto the cover.5. Tighten the bolt.Changing Secondary Filter
1. Unscrew filter element. Throw away the used element. 2. Make certain all of the used element seal is cleaned from the filter base. 3. Coat the seal of the new element with clean diesel fuel.
Do not fill fuel filters with fuel before installing them. Contaminated fuel will cause accelerated wear to fuel system parts.
4. Install the filter by hand. When the seal contacts the base, tighten 3/4 turn more. There are rotation marks 90° apart on the filter. Use these as a guide for proper tightening.5. Start the engine and check for leaks. If the engine will not start, prime the fuel system.