Maximium engine protection against the ravages of dust is possible ONLY if the air cleaner is serviced at regular
intervals. Over-servicing does not utilize the air cleaner features to the fullest. The procedure is simple - just follow
these easy steps as shown.
1. Measure the restriction of the air cleaner with a Donaldson restriction indicator, service gauge, or a water
manometer at the restriction tap provided in the air cleaner, the transfer pipe, or the blower intake. Replace or
clean the element only when the restriction has reached the maximum allowed by the engine or equipment
2. Dust cups should be dumped when 2/3 full. Frequency of dust cup service will vary with dust conditions.
Reinstall the dust cup, making sure it seals 360° around the air cleaner body. On Vacuator Valve equipped
models, dust cup service is cut to a minimum; a quick check to see that the Vacuator Valve is not inverted,
damaged, or plugged is all that is necessary.
3. Inspect and tighten all air cleaner induction system connections.
4. Inspect all gaskets. Replace if worn or damaged. Annual replacement of all gaskets is recommended.