John Deere 2155 2WD Cluster Gauge lights?

[knocworst]

I've got a 2WD 1989 John Deere 2155 the has a yellow warning light that started to come on intermittently on the cluster gauge.
The problem is that I can't locate what the symbol means.

My gauge looks like this


The indicator light is a circle with a dashed line through it. It's not clear form the picture but an arrow pointing down is on the lower half of the circle. The upper half of the circle has what looks to be a "mist" or "spray" symbol


Does anyone know what this indicator means?

 

[knocworst]

I found the answer.
It is an indicator to check the "Air Cleaner"