This Illustrated Factory Workshop Service Manual is for the Yale E878 Series forklift, specifically the GP135VX model. It contains high-quality images, circuit diagrams, and detailed instructions for operating and repairing this Diesel/LPG forklift. The manual is printable, searchable, and provided in PDF format within a ZIP file. It covers GM Powertrain, LPG Fuel System, Gasoline Fuel System, High Voltage Switch (HVS), Ignition, Kubota Powertrain (Kubota Diesel 3.6L Engine, Kubota Engine Repair 3.8L Diesel w/DPF), Drivetrain, Operator's Cab, Frame, Cooling System, Three-Speed Powershift Transmission Repair, Two-Speed Powershift Transmission Repair, Drive Axle and Differential Assembly Repair, Steering Axle, Brake System, Hydraulics (Hydraulic Gear Pump, Hydraulic Cleanliness Procedures, Main Control Valve, Cylinder Repair), Mast Repairs, Electrical Wire Harness Repair, User Interface, User Interface Electrical System, Reference Material (Metric and Inch (SAE) Fasteners, Calibration Procedures, Periodic Maintenance, Capacities and Specifications), Diagrams and Schematics, and Diagnostic Troubleshooting (Manual, Updates, High Engine Water Temperature).