Sundstrand Sauer Danfoss Series 20 Valve Plates

As you can see in the diagram that these are valve plates that are good to use.
In the plate at the top is flat, has no flaws on it all. If it did have nicks or burrs, you can feel them with your fingers and not to mention seeing the scratches. And if it is nicked up, it should be replaced.
Again in the second picture you can see the same as before, clean of abrasions. Now there will be a normal wear pattern on the plate. And on the picture it shows a normal amount of wear, not to much. If it should show more wear or discoloration, it needs to be replaced.
In the last picture it shows a normal wear pattern on the outer surface of the plate. And again if it were excessive, the plates need to be replaced.

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