Perkins M92B, User Handbook Manual

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Chapter 4 N37347
Page 36
Air filter
Caution: Do not operate the engine if there is a blockage in the air filter or the induction hose. This can cause
lubricating oil to enter the cylinders through the breather valve.
Environmental conditions have an important effect on the frequency at which the air filter needs service.
Air filters have automatic dust valves (Z1) through which dust is expelled from the filter. The rubber dust valve
must be kept clean. Ensure that the sides of the valves close completely together and that they can separate
freely.
If a restriction indicator (A A) is fitted, it will indicate precisely when the air filter element needs replacement. This
prevents the premature removal of the filter element which causes extra cost or late removal of the element
which can cause loss of engine power. The filter element must be renewed according to the manufacturers
recommendations.