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Part of the John Deere Repair Manuals.
This is the factory Diagnostics and Tests manual (TM401719) for the 2008-2014 John Deere 5R series: 5080R, 5090R, 5100R and the narrow 5080RN, 5090RN, 5100RN orchard/vineyard variants - all six models in one book. It is the fault-finding side of the library: full DTC trouble code tables, symptom-based diagnosis for faults that never set a code, functional and diagnostic wiring schematics, ECU pin-outs, and PowrQuad transmission diagnosis. The hydraulic and steering chapters give the actual test values - pump delivery of 55 or 65 L/min, max system pressure of 19000-20600 kPa (190-206 bar), max steering pressure 17500-18100 kPa - with the procedures to check them at the specified 60°C oil temperature. This is the diagnostic manual; teardown and torque specs live in the separate Repair TM.
What's Inside This John Deere 5080R-5100RN Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 9-89 | Diagnostic Approach, Reference Info, Reading Schematics |
| Diagnostic Trouble Codes | 90-467 | Dtc Fault Code Tables All 6 Models, Code Diagnostics |
| Observable Symptoms | 468-572 | Symptom-Based Diagnosis, No-Code Faults |
| System Diagnostics | 573-614 | System-Level Diagnosis Procedures |
| Engine | 615-621 | Engine Diagnosis, Performance Tests |
| Fuel, Air Intake and Cooling Systems | 622-689 | Fuel System, Air Intake, Cooling, DPF |
| Electrical System - Circuits and Control Units | 690-1116 | Starting & Charging, Lights, BIF/BCU/EPC Control Units, CAN Bus, Engine ECU, PowrQuad Epc |
| Electrical Connectors and Component Information | 1117-2179 | Connector Views and Pin-Outs (X001-X1249+), Harness Component Locations |
| Electronic Control Units | 2180-2709 | ECU Diagnostics, Controller Pin-Outs |
| PowrQuad Transmission | 2710-2858 | PowrQuad Theory & Diagnosis, Pressure Tests, Hydraulic Schematics |
| Drive Systems | 2859-2924 | MFWD, Driveline Diagnosis |
| Steering and Brakes | 2925-3026 | Steering Diagnosis, Brake Tests |
| Hydraulic System | 3027-3148 | Pc Hydraulic System, Operational Checks, Pressure Tests & Adjustments, SCV |
| Miscellaneous | 3149-3181 | Misc Systems |
| Operator's Cab | 3182-3260 | Cab Electronics, HVAC, Instruments |
| Special Tools | 3261-3286 | Jd Service Tools |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| SCV operation check | ||
| Cylinder size | 89 x 203 mm (3-1/2 x 8 in.) | p. 3027 |
| Cylinder full extension time | less than 2.5 seconds | p. 3027 |
| Steering pressure check | ||
| Expected pressure | 18000 kPa (180 bar; 2610 psi) | p. 3027 |
| Min. steering pressure | 1300 - 1800 kPa (13 - 18 bar; 188 - 260 psi) | p. 3027 |
| Actual steering pressure (cut-off valve closed) | 800 - 1200 kPa (8 - 12 bar; 116 - 174 psi) | p. 3027 |
| Max. steering pressure | 17500 - 18100 kPa (175 - 181 bar; 2538 - 2625 psi) | p. 3027 |
| Min. steering pressure | 13000 - 18000 kPa (13 - 18 bar; 188 - 260 psi) | p. 3027 |
| System pressure check | ||
| Min. system pressure | 1300 - 1800 kPa (13 - 18 bar; 188 - 260 psi) | p. 3027 |
| Max. system pressure | 19000 - 20600 kPa (190 - 206 bar; 2756 - 2988 psi) | p. 3027 |
| Priority circuit 1 (steering neutral) | ||
| Min. LS pressure | 0 - 100 kPa (0 - 1 bar; 0 - 15 psi) | p. 3027 |
| Priority circuit 1 (steering at stop) | ||
| Max. LS pressure | 16000 - 17000 kPa (160 - 170 bar; 2320 - 2465 psi) | p. 3027 |
| Priority circuit 3 (hitch raised) | ||
| Max. LS pressure | 18000 - 19000 kPa (180 - 190 bar; 2411 - 2756 psi) | p. 3027 |
| All tests | ||
| Oil temperature for tests | 60°C (140°F) | p. 3027 |
| Steering neutral | ||
| Min. steering pressure | 800 - 1200 kPa (8 - 12 bar; 116 - 174 psi) | p. 3027 |
| 23 cm³ (1.4 cu.in.) hydraulic pump | ||
| Hydraulic pump delivery rate | 55 L/min (14.5 U.S.gpm) | p. 3027 |
| 27 cm³ (1.7 cu.in.) hydraulic pump | ||
| Hydraulic pump delivery rate | 65 L/min (17.2 U.S.gpm) | p. 3027 |
John Deere 5080R-5100RN Common Problems This Manual Covers
Engine will not crank, or the starter clicks once and quits
Work the starting circuit tests in the Electrical System chapter: battery condition, cable voltage drop, starter solenoid feed, and start-enable relays, using the diagnostic schematics to trace the circuit pin by pin instead of replacing the starter first.
Manual Section: Electrical SystemLow or erratic hydraulic pressure, slow loader or hitch response
Run the operational checks and pressure tests in the Hydraulic System chapter with oil at 60°C. Compare readings against the specified max system pressure of 19000-20600 kPa and LS values, then follow the adjustment procedures for the PC pump and valves.
Manual Section: Hydraulic SystemPowrQuad shifts harshly, slips under load, or a range will not engage
Use the PowrQuad Transmission chapter's diagnosis flow and clutch pressure tests with the transmission hydraulic schematics. Pressure readings separate a sticking control valve or leaking circuit from mechanically worn clutch packs before the case ever gets split.
Manual Section: PowrQuad TransmissionCharging warning on, battery going flat between jobs
The Electrical System chapter's charging circuit tests check alternator output, regulator behavior, and the wiring between alternator and battery. Harness testing procedures catch the corroded connector or chafed wire that mimics a dead alternator on these tractors.
Manual Section: Electrical SystemFrequently Asked Questions
Will this manual help me decode and clear fault codes on my 5090R or 5090RN?
Yes. The Diagnostic Trouble Codes chapter carries the full DTC tables for all six models, including the ECU-sourced codes these electronic tractors throw. Each code points you into a diagnostic procedure, and the Electronic Control Units chapter gives controller pin-outs so you can test the circuit instead of guessing. That said, clearing a code without fixing the cause just brings it back - the book walks you to the actual fault first.
My tractor cranks slowly or won't start at all. Does the manual cover starting and charging?
The Electrical System chapter has dedicated starting and charging circuit tests, plus harness testing procedures and both functional and diagnostic schematics. You can chase a lazy starter, a solenoid that clicks but won't pull in, or an alternator that isn't holding charge with a multimeter and the wiring diagrams instead of swapping parts on a hunch. Battery, connections, and ground paths are all in the test flow.
Does it include the pressure specs to actually test the hydraulics, or just theory?
Real numbers with real procedures. The Hydraulic System chapter covers the pressure-compensated load-sensing system with operational checks, pressure tests and adjustments: max system pressure of 19000-20600 kPa (190-206 bar; 2756-2988 psi), min standby around 1300-1800 kPa, LS pressure ranges, and pump delivery rates of 55 and 65 L/min. Tests are specified at 60°C (140°F) oil temperature, and SCV diagnosis is included.
Is this the right book for PowrQuad transmission problems like slipping or harsh shifts?
Yes, for finding the fault. The PowrQuad chapter covers theory of operation, diagnosis, clutch pressure tests, and the transmission hydraulic schematics, so you can tell a control valve or pressure problem from worn clutch packs before anything comes apart. If the diagnosis points to internal wear, the actual overhaul procedures and torque specs are in the separate Repair technical manual, not this one.
I have a narrow 5080RN - is it really covered, or just the standard R models?
All six models are covered in the one manual: 5080R, 5090R, 5100R and the narrow RN versions 5080RN, 5090RN, 5100RN built 2008-2014. The DTC tables, schematics, and test procedures apply across the range, with model differences called out where they matter. The RN orchard and vineyard tractors share the same electronics, PowrQuad transmission, and PC hydraulic architecture as the standard-width machines.
