Features: 1. Compatible Engines: Perfectly fit for John Deere 1039, 4045, 6059 and 6068 engines,Replace for John Deere tool number JDG-954B,Used on seals RE538097 and DZ111671. 2. Function: This tool set is used for removal and installation of the front crankshaft seal to engines. It helps install/replace the seal without damaging the seal, it credibly prevents the seal from leaking. 3. Warm Prompt: To assure proper sealing, the OD of the crank shaft and wear sleeve MUST BE cleaned with Brake Kleen, Ignition Cleaner, or equivalent and dry prior to installing seal. .