Part of the John Deere Repair Manuals.
Looking for a John Deere 40 technical manual PDF? This 73-page Technical Manual (OEM #TM1593) covers the full line of John Deere hydraulic attachments: the 8A, 10, and 10A backhoes, the 40, 44, 60, 70, and 70A loaders, plus the 51, 52, 67, 365, 375, 380, 380A, and 390 tillers, blades, and hydraulic dump units. Inside you get hydraulic schematics with theory of operation for every circuit, troubleshooting charts for backhoe and loader systems, and a full run of cylinder repair procedures from disassembly to seal replacement. Torque tables span unified inch, metric, and O-ring boss fitting values. Check lift cylinder drop rate against the 10.4 mm/min limit, then set the lift cylinder lock nut to 272 N-m (200 lb-ft). No more chasing hydraulic leaks on guesswork. Bookmarked with a live text layer; search a spec, jump to it, and get your attachment back on the tractor.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction | 2 | Table of Contents, Specifications, Component Location, System Schematic, Theory of Operation, Troubleshooting Chart |
| Safety | 3-7 | Safety Information, Signal Words, Safety Signs, Fire Prevention, High-Pressure Fluid Lines, Protective Clothing |
| Specifications & Information | 8-23 | Backhoe Hydraulic Specifications, Loader Capacities, Fitting Torque Values, Unified Inch Torque Values, Metric Torque Values, Lubricants |
| Backhoes | 24-49 | Component Location, Theory of Operation, Troubleshooting, Diagnostics, Tests and Adjustments, Cylinder Repair |
| Loader | 50-57 | Troubleshooting, Theory of Operation, Cylinder Repair, Control Valve, Hydraulic Pump, Loader Restrictors |
| Tiller | 58-63 | Hydraulic Pump, Hydraulic Motor, Disassembly, Assembly |
| Blades | 64-65 | Angle Cylinder, Lift Cylinder |
| Hydraulic Dump | 66-67 | Cylinder Repair, Disassembly, Assembly |
| Miscellaneous | 68-71 | Hoses, Fittings, Hose Selection, Hose Failures, Hose Routing, Hose Installation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 60, 70, 70A | ||
| Lift cylinder drop rate (maximum acceptable limit from transport position) | 10.4 mm/min (.41 in./min) | p. 18 |
| Bucket cylinder drop rate (maximum acceptable limit from rollback position) | 13 mm/min (.51 in./min) | p. 18 |
| 655, 670, 770, 755, 855, and 955 | ||
| Internal valve leakage (maximum acceptable limit) | 12 ML/min (0.73 cu. in.) | p. 18 |
| All Models | ||
| 1/4" single wire braid hose pressure | 3000 psi | p. 70 |
| 1/4" double wire braid hose pressure | 5000 psi | p. 70 |
| 7 Backhoe | ||
| Main System Relief Valve Pressure (7 Backhoe) | 11713 kPa (1700 psi) | p. 10 |
| Circuit Relief Valve Setting (7 Backhoe) | 14469 kPa (2100 psi) | p. 10 |
| 8 & 8A Backhoe | ||
| Main System Relief Valve Pressure (8 & 8A Backhoe) | 14124.5 kPa (2050 psi) | p. 10 |
| 10A Backhoe | ||
| Main System Relief Valve Pressure (10A Backhoe) | 15847 kPa (2300 psi) | p. 10 |
| 8, 8A, 10, 10A Backhoe | ||
| Circuit Relief Valve Setting (8, 8A, 10, 10A Backhoe) | 19981 kPa (2600 psi) | p. 10 |
| 7, 8, 8A Backhoe | ||
| Crossover Relief Valve Setting (7, 8, 8A Backhoe) | 7407-8440 kPa (1075-1225 psi) | p. 10 |
| 10, 10A Backhoe | ||
| Crossover Relief Valve Setting (10, 10A Backhoe) | 10335-11369 kPa (1500-1650 psi) | p. 10 |
