N37347 Chapter 4
Page 37
Restriction indicator
The restriction indicator is tted on the air lter outlet or between the air lter and the induction manifold.
When the red warning indicator (BB1) is seen through the clear panel (BB2) after the engine has stopped, the
air lter element must be removed for service.
After a clean element has been tted, press the rubber bottom (BB3) or the button (BB4) of the restriction
indicator to reset the red warning indicator.