New Holland straw build up in straw elevator

[Traktaris]

I got NH TC combine and so far harvested OSR, winter and spring wheat, barley and peas. In some fields of winter wheat I noticed annoying "da-da-da-da" sound which came and went. One day it got really loud so I started to look for what causes it and it turned out, that straws get stuck on top axle of straw elevator, then builds up to the point it lifts elevator chain which starts to wobble causing the sound. Chain tensioners are tensioned right to the marks.
What causes straw build up and how to avoid it? I myself could not figure it out. All fields seemed equally dry and it seems no correlation between straw length and the sound. Driving speed also doesn't change anything.

 

[Spud]

I got NH TC combine and so far harvested OSR, winter and spring wheat, barley and peas. In some fields of winter wheat I noticed annoying "da-da-da-da" sound which came and went. One day it got really loud so I started to look for what causes it and it turned out, that straws get stuck on top axle of straw elevator, then builds up to the point it lifts elevator chain which starts to wobble causing the sound. Chain tensioners are tensioned right to the marks.
What causes straw build up and how to avoid it? I myself could not figure it out. All fields seemed equally dry and it seems no correlation between straw length and the sound. Driving speed also doesn't change anything.

Has it got anti wrap guards around the straw elevator drive shaft?

 

[bravheart]

That looks as though the straws are coming down the top of the elevator again.
The drum access plate above the elevator below your seat has an adjustable stripper plate to prevent this.

What's the stone trap like? If it's built up with hard soil or stone there might be nowhere else for the material to go but back down again.

 

[sodbuster2]

There is a DIA kit for top shaft anti wrap shields too

84016177​

 

[Traktaris]

Has it got anti wrap guards around the straw elevator drive shaft?

I actually have no idea. I previously had CS(CSX) which had really wide access doors and plates while on TC you can only put your hand with a phone and take a photo to see what's wrong. Will later do that to check if it has those guards.

That looks as though the straws are coming down the top of the elevator again.
The drum access plate above the elevator below your seat has an adjustable stripper plate to prevent this.

What's the stone trap like? If it's built up with hard soil or stone there might be nowhere else for the material to go but back down again.

I clean stone trap every other day. Next time I will hear the sound I will try cleaning stone trap and see if it helps.
Most likely it might be that stripper plate. Too bad there is no info about it in my Operators manual. I will look at it and will try adjusting it using common sense. It would be great if someone have and can share exact instructions on how to set it.