Air Filter; Restriction Indicator - Perkins 1000 Series User Handbook Manual

4

Air filter

Environmental conditions have an important effect on
the frequency at which the air filter needs service.
Certain air filters have a separate dust bowl (A1)
which must be cleaned at intervals. The amount of
dust in the bowl shows if it has been removed at the
correct time for the conditions of operation. Do not let
dust completely fill the bowl, because this will reduce
the life of the filter element (A2).
Certain air filters have automatic dust valves (B1)
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 (C) is fitted, it will indicate
precisely when the air filter element needs service.
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 cleaned or renewed
according to the manufacturers recommendations.

Restriction indicator

The restriction indicator for these engines must work
at a pressure difference of 508/558 mm (20/22 in) of
water gauge. It is fitted on the air filter outlet or
between the air filter and the induction manifold.
When the red warning indicator (C1) is seen through
the clear panel (C2) after the engine has stopped, the
air filter element must be removed for service.
After a clean element has been fitted, press the
rubber bottom (C3) or the button (C4) of the restriction
indicator to reset the red warning indicator.
40
A
B
2
1
A1039
1
A1040