Unfortunately, this moisture can have some undesirable effects including:
There are a number of steps you can take to reduce, or even eliminate the impact of wet weather operation. There are also ways of preventing much of the moisture in the incoming air from entering the air cleaner.
For on-highway applications, the use of an air ram will help to eliminate much of the excess water as the air is drawn into the intake.
For off-road equipment, the use of a good quality rain cap or stack-top moisture eliminator will remove up to 80% of moisture from incoming air.
An inline separator, mounted before the air cleaner will also remove up to 80% of the moisture (and up to 70% of dust in dry conditions!) from the incoming air and is suitable for both on and off road vehicles.
Another option is to install an in-line moisture skimmer, designed to fit in a horizontal position before the air cleaner.
None of these moisture reducing devices have any moving parts. They are virtually maintenance free, other than an occasional inspection during servicing. All will remove most of the incoming water from moisture laden air, giving longer filter life, reduced operating costs and better performance.
If your restriction indicator has locked at the maximum restriction level after operating in wet conditions, it needs servicing. To service the indicator, remove, clean and dry the indicator. Reset it and apply a small amount of vacuum. If it locks up again, reset and refit it. If it does not lock, replace it.