John Deere 1025R fuel filter change + water in bowl?

We do a main fuel filter change on a 2015 John Deere 1025R with the Yanmar 3 cylinder diesel engine.
How much water does it actually take to float the WIF (water in fuel) indicator? With a syringe, a metered amount of water is put into the filter bowl to see how much will float the red WIF disc.
It's hard to get into the habit of checking the indicator, but needs to be checked on a regular basis.
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Видео John Deere 1025R fuel filter change + water in bowl? канала Pm Tips