Sundstrand Sauer Danfoss Series 20 Piston Slipper Part 2

The diagram shows 3 different ways you should not use pistons, if they look like the ones in the diagrams. They will definitely need to be replaced.

In the top diagram it shows discoloration on the outside of the piston. When it looks like this you are running your unit at high temperatures.

The middle picture shows piston filler being separated. Again this one is being used at high temperatures and long cavitation. The filler is not a replaceable item. You will need to get another piston.

The bottom slipper shows the cap off the piston slipper. And it is badly worn. If the piston is stuck it can cause this kind of separation. Over speeding, contamination and not enough lubrication can cause this to happen.

Check with us, we can get new,used or reman pistons. Call us at 800-361-0068
or send us email at sales@hdyrostatic-transmisison.com