Part of the John Deere Repair Manuals.
TM1749 takes the John Deere 280 skid steer apart system by system, 522 pages of technical manual PDF running from engine removal through brakes and hydraulics. Electrical coverage runs longer than any other section in the book, with wiring schematics tracing harnesses through the shutdown module, charging circuit and cab heater and defroster wiring. Hydrostatic schematics show pump and motor porting for neutral adjustment and pressure relief testing, while troubleshooting charts and fastener torque tables sit near the front where you can reach them fast. Set hydrostatic relief pressure to 37 921 kPa (5500 psi), confirm charge circuit at 3103 kPa (450 psi), then pull M14 cap screws to 225 N-m (165 lb-ft). Bookmarked and text-searchable, this file carries you from symptom to spec.
What's Inside This John Deere 280 Manual
| System | Pages | Key Topics |
|---|---|---|
| Specifications | 11-14 | Engine, Fuel System, Electrical System, Capacities, Hydraulics and Hydrostatics, Dimensions, Tires, Recommended Lubricants |
| Metric Fastener Torque Values | 15 | Class 4.8 Fasteners, Class 8.8 Fasteners, Class 9.8 Fasteners, Class 10.9 Fasteners, Class 12.9 Fasteners |
| Metric Fastener Torque Values, Grade 7 | 16 | Steel Fasteners, Gray Iron Fasteners, Aluminum Fasteners |
| Inch Fastener Torque Values | 17 | Grade 1 Fasteners, Grade 2 Fasteners, Grade 5 Fasteners, Grade 8 Fasteners |
| O-Ring Seal Service Recommendations | 18-20 | Face Seal Fittings with Inch Stud Ends Torque, Face Seal Fittings with Metric Stud Ends Torque, O-Ring Face Seal Fittings, O-Ring Boss Fittings |
| Diesel Fuel Specifications | 21 | Lubricity, Storage |
| Engine Oil Specifications | 22-23 | 4-Cycle Diesel Engine Oil, North America, Break-In Diesel Engine Oil, Hydrostatic Transmission and Hydraulic Oil |
| Chain Case Oil Specifications | 24 | Chain Case Oil, North America |
| General Application Grease Specifications | 25 | Grease, North America |
| Coolant Specifications | 26 | Supplemental Coolant Additives, Diesel and Gasoline Engine Coolant Drain Interval, North America |
| Diesel Engine | 27-72 | Engine Removal, Engine Repair Stand, Starting Motor, Fuel System, Fuel Injection Pump Timing |
| Electrical | 73-78 | |
| Specifications | 79-80 | |
| Electrical Diagnostic Information | 81-91 | Legend for Electrical Components, Component Location |
| Electrical Schematics | 92-103 | |
| Electrical Wire Harnesses | 104-126 | Wiring Harnesses |
| Troubleshooting Chart | 127 | |
| Theory of Operation and Diagnosis | 128-246 | Charging Circuit, Shutdown Module, Cab Heater/Defroster Circuit |
| Tests and Adjustments | 247-272 | Battery Test |
| Component Replacement | 273-288 | |
| Power Train (Chain Case and Axles) | 289-300 | Chain Case Oil Level, Drive Chain Tension, Axle Housing Removal, Drive Chain and Sprocket Replacement |
| Hydrostatic Power Train | 301-370 | Hydrostatic Pump Removal, Hydrostatic Motor Repair, Neutral Adjustment, Pressure Relief Test, Tandem Pump Exploded View |
| Steering | 371-388 | Steering Control Effort, Centering Assembly, Steering Dampener, Steering Cross Shaft, Steering Control Lever Handle |
| Brakes and Hydraulics | 389-522 | Park Brake Pressure Test, Brake Disassembly, Hydraulic System Pressure Release, Control Valve Removal, Bucket Cylinder Repair, Index |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydrostatic System Relief Pressure | 37 921 ± 1379 kPa (5500 ± 200 psi) | p. 303 |
| Charge Circuit Pressure | 3103 + 689 - 172 kPa (450 +100 - 25 psi) | p. 303 |
| M12 Cap Screw Torque | 140 N•m (105 lb-ft) | p. 48 |
| M14 Cap Screw Torque | 225 N•m (165 lb-ft) | p. 48 |
| Sensor and fuel pressure line tightening torque | 30 N•m (22 lb-ft) | p. 43 |
| Dynamic Timing | 7.5° | p. 45 |
| Rated Speed | 2400 RPM | p. 45 |
| Pivot bearing block mounting cap screws torque | 40 N•m (30 lb-ft) | p. 386 |
| Steering control lever link rod cap screw torque | 40 N•m (30 lb-ft) | p. 386 |
| Engine Net Horsepower | 63.4 kW (85 hp) | p. 12 |
| Fuel Tank Capacity | 91 L (24.0 gal) | p. 13 |
| Hydraulic Reservoir Capacity | 32.2 L (8.5 gal) | p. 13 |
