Pair (2) of cylinder packing / seal kits to fit:

480B s/n 8735717 & up

480C up to s/n 8980833

580B s/n 8741258 & up

580C up to s/n 8983287

Steering cylinders 3/4" rod x 1-1/2 bore

Serial numbers beginning with a 4 or 5 are the Loader or Backhoe serial number and are not relevant to this item, your "machine" or "tractor" serial number begins with an 8 or a 9.  

Never attempt to service a pressurized cylinder, or a cylinder connected to a load, never use air or hydraulic pressure to disassemble a cylinder. These are top quality aftermarket replacement parts, we are not affiliated with any equipment manufacturer.