Will be shortly rebuilding the boom and dipper cyls on a 1976 Case 580C backhoe. It appears that it is very difficult to order a rebuild kit ahead of time since you can have either a single or split piston - which takes different parts I guess. Is there a higher percentage of it being the single or double type units based on what you Fellows have found? Would prefer to pull apart, rebuild and put back together at the same time with the kit on hand. SKK
I had to pull a cylinder to find out for the first one. Get the hoe numbers off the tag that is at the rear end in the fender well on the side you climb aboard. Should start with a 33 or 35 number. Use that along with the other numbers on Case's web site. That might help. Oh, mine is a 1979 and has single pistons.
On the 580C and newer backhoes there is a number stamped into the gland of the cylinder. This number is the part number for the cylinder. With it they should come up with all the parts for that cylinder.
Looked for numbers once before and found nada. Have power washed since then, so will look again. Down rigger cyls pretty banged up, but most of the others should be fine to read. Will look over again. Thx.
The cylinders could have either, the one or two piece pistons. Case used both, that is why the parts list shows two different sets of numbers. It would be nice to have the seal kit in hand and ready to install when you disassemble the cylinders but, the only way to determine which ones you have is by taking the pistons out. Case glands don't always have the part numbers stamped on them.
Providing the cylinder has not been modified, if the stamped string of characters on the packing gland nut starts with G10xxxxxxxxm, it has a single piece piston. Otherwise it is a split piston. A little more information I want to share is that stock units use the same part number seal kits on the stabilizer, swing, and dipper cylinders.