Dynamometer testing of horsepower at various filter restrictions has shown that horsepower remains constant as air filter restriction increases up to the maximum level of filter restriction recommended by engine and vehicle manufacturers.
Engine horsepower can decrease when air filter restriction exceeds the engine or vehicle manufacturer's recommendations.
The air filter restriction gauge should be installed on the air filter housing (clean air side).
Select the location for the gauge and check hood clearance.
The gauge may be mounted vertically or horizontally.
Open the air cleaner housing and drill an 11/16" hole.
IMPORTANT: Do not let shavings fall into the intake manifold.
A spade bit or similar cutting implement works well for plastic housings.
Press the rubber grommet into the 11/16" hole (drilled in Step Two) until it seats into the proper position, locking in place.
Push the gauge into the rubber grommet until fully seated. If needed, use water or a mild soap solution to help insertion.
Do not use solvents, oil, or other petroleum based products, as they can crack the clear housing of the Filter Minder®.
Close the air cleaner cover, again taking care to prevent any shavings from entering the manifold. Ensure the Filter Minder® is securely seated.
Unclamp the entrance to the air cleaner port and, with the engine running, slowly close off the opening.
Watch the Filter Minder® gauge ratchet up to indicate restriction. Push the reset button and you're done.
Donaldson Company, Inc.
2940 Airport Blvd.
Waterloo, IA 50703
United States
319-234-0231
info@filterminder.com