one of the differntial cylinder for pumping is not moving and the other is moving to the end of the stroke.is it because of a damaged piston  rings or can something in the control mps case this problem?

Is the cylinder stuck in the extended position? If you have leaking piston rings, the cylinder is still moving, but will take longer to complete the stroke. Usually, mps problems show as no shifting at the end, or shifting halfway through,

one of The cylinders is Stucke The end of The stroke( Fully extended ) and is not moving at all . The other cylinder Move to the end of the strokes while The other is not moving at all

Hi Shady,

Call 888-SCHWING (724-9464)

We have service techs available that can help you over the phone.

i believe that you may have had the piston come off of the shaft

i amThinking also that this could happen or a damaged piston rings

30 something you are right .we found that the Piston rod came out from p iston , one bolt has been Broken and The Thread of the other two bolts have been damaged and the two bolts has came out . it is the first time we see something Like this . Did it happen to any one else?

some picture for piston and rod , to I have to contact Schwing dealer ? 

some picture for piston and rod , to I have to contact Schwing dealer ? 

another Picture

Shady, 

Not sure what your situation is as far as machine shops or hydraulic shops, but you need to inspect all parts, especially the threads, to see if you can save them. You can contact your Schwing dealer, but if they don't have the capacities to do cylinder repair, you may end up buying a new one

a compelte differential cylinder we have to replace .also the cylinder has too many scratches from inside .we are not sure why something like this is happened.this isvery strange