John Deere 250D and 300D Articulated Dump Truck Operation & Test Manual

Table of Contents

Volume 1: Operation & Maintenance

Section 10: General
- Specifications & Identification Codes
- Fluid Capacities & Recommendations
- ✅ Maintenance Interval Schedule (Critical Chart)
- Break-in & Towing Procedures
- Lubrication Diagrams
Section 20: Operation
- Controls & Instruments (Dashboard)
- Starting, Operating, & Parking Instructions
- Dumping Body Operation
Section 30: Maintenance
- Daily Walk-around Inspection
- Step-by-Step Service Procedures (Filters, Lubrication, Adjustments)

Volume 2: Systems Operation & Testing (Core Technical Content)

Section 40: Electrical System
- Schematic Diagrams
- ✅ Component Location & Troubleshooting
- Harness Routing
- ECU/Controller Diagnostics
Section 50: Engine (John Deere 6068/6090)
- Operating Principles
- ✅ Fuel System & Governor
- Air Intake & Exhaust
- Cooling System
- ✅ Engine Performance Tests
Section 60: Power Train
- ✅ Transmission (ZF/Powershift) – Operation & Diagnostics
- Output Transfer Gear
- Axles & Final Drives
- Parking Brake & Service Brake Systems
Section 70: Hydraulic Systems
- Steering System
- ✅ Hoist (Dump) System – Operation & Pressure Tests
- Brake Hydraulic Circuit
- Pump & Valve Schematics
Section 80: Frame & Chassis
- Articulation (Oscillation) Joint
- Body & Hoist Cylinder
- Suspension (Frame Dampers)

Volume 3: Disassembly & Assembly (Major Repairs)

Section 100-180: Step-by-Step Repair
- Engine Removal, Teardown, & Rebuild
- Transmission & Axle Overhaul
- Hydraulic Pump & Cylinder Rebuilding
- Wiring Harness Replacement
- ✅ Bearing & Seal Specification Charts
- ✅ Torque Specifications (Master Chart)

Volume 4: Diagnostics & Troubleshooting (User-Intent Focused)

✅ Diagnostic Code List (Fault Codes)
✅ Symptom-Based Troubleshooting Trees (e.g., “No Start,” “Low Power,” “Transmission Slips,” “Will Not Steer,” “Body Will Not Raise”)
✅ System Tests & Adjustment Procedures (Pressures, Settings, Clearances)

Cat | Construction Products | Caterpillar