I've got a 633D Scraper who's tractor serial is 25W00586 and the scraper is a serial 19W00585. The cushion hitch cylinder on this machine is leaking pretty badly and I wanted to order the seals before I pull it out, but I can't find the Cylinder anywhere in the parts book I have or on SIS. I'd appreciate any help identifying the cylinder so I can look it up and order the seals. Thanks!
From what I remember the cushion hitch cylinder should be the same on a 631D, 633D, & 637D machine. A quick way to check would be look for a Part Number cast into the head of the cylinder and compare it with the one shown in the parts list below. The cylinder quoted for a 637D is an 8J-9959.