1. The MTC855 Caterpillar Challenger Electrical & Hydraulic Schematic Manual is a comprehensive guide designed for maintenance and repair of equipment with serial number 818. This manual provides detailed diagrams and schematics to assist in troubleshooting electrical and hydraulic systems, ensuring optimal performance and efficiency of the machinery. Ideal for technicians and operators, this manual is a valuable resource for ensuring proper functioning of the Caterpillar Challenger.