I am writing this from my daily work in Sudanese mining sites, like Abu Hamad and Berber. In these places, the "Haboub" (big dust storms) is the main enemy for any generator. Last week, I saw a Perkins 1104 engine almost stopping because the air filter was completely full of sand after only 200 hours of work.
What I do in the field:
The technical manual says to change the air filter every 500 hours. But in the Sudanese desert, this is impossible. If you wait 500 hours, you will lose the turbocharger or damage the engine valves.
My Tip 1: I always install a "Pre-cleaner" before the main filter. It helps a lot to spin out the heavy sand before it reaches the paper filter.
My Tip 2: Many technicians try to clean paper filters with high-pressure air. I always tell them: No! This makes small holes in the paper that we cannot see. If the filter is blocked, it is better to change it for a new one.
My Tip 3: Keep an eye on your DSE 7320 screen for the "Restricted Air" alarm. But remember, sometimes the sensor itself is dirty and needs a quick clean with spray.
Mechanical Student Perspective:
In my studies at Sudan University of Science and Technology, we learn the theory of airflow. But in the desert, you learn that air is just as important as diesel. A "hungry" engine for air will never give you the full power (KVA) you need for the factory.
Conclusion:

I like Perkins engines in these sites because their systems are easy to maintain for my team. What about you? How many hours does your air filter last in very dusty areas?
Eng. Osman Adam Addoma
@eng1

Marlboro filter