JD 310C Dashboard Filter Light stays on too long when first starting.

My John Deere 310C Dash Light for the hyd. Filter (yellow) stays on when cold.

Not sure what to make of this problem; (In short) the dash board yellow light indicating a hyd. filter issue comes on with cold starts. more so in the Winter, during the Summer it does not stay on as long, then as the machine reaches operating temp it fades away from intermittently coming on, meaning with low idle light is off, raise idle a bit it comes on, when it nears operating temp less and less light until...

JD 310C Dashboard Filter Light stays on too long when first starting.

JD 310C Dashboard Filter Light stays on too long when first starting.