CLAAS TRACTOR CELTIS WORKSHOP SHOP SERVICE REPAIR MANUAL: If you own or work on the Celtis then this is the repair manual for you, covers in detail all you need to know in the service and repair of your tractor.This is the Claas repair manual in electronic format so all text and images are crystal clear.This file has been zipped up, you will need to unzip the .rar file to view the pdf manual.DPS engine B41 gearbox Also includes diagnostic manual for the engine.