Sundstrand Sauer Danfoss 90 Series Motor – Charge Relief Seat
They have made a change to the 55cc, 75cc, 100cc fixed displacement and variable displacement motors concerning the end caps.
The end caps used now have a pushed in insert that is made like a seat for the charge pressure relief valve assy. It was used as a wear and tear surface for the valve poppet.
Now the charge relief poppet just sits right on the casting machined surface. This was put into action at first with the 130cc models. This interchangeable with the other end cap and other flexible relief valve parts. The preceding end cap part number is obsolete as service parts.
If we can assist you with this change or you have questions, call us at 800-361-0068