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Part of the John Deere Repair Manuals.
This is the John Deere factory Diagnosis and Tests service manual (TM2047) for the 7220, 7320, 7420 and 7520 tractors. It is the diagnostic and electrical testing volume - written for dealer technicians who need to find and confirm a fault before repairing it. The 5,627 pages cover observable symptom-based fault trees, step-by-step diagnostic trouble code procedures for all 14 electronic control units, hydraulic system pressure and flow tests with real measured specifications, fuel and cooling system tests, functional wiring schematics for both AutoPowr/IVT and PowrQuad-Plus transmission variants, ECU address tables for reading live sensor data, and a special tools reference. This volume is the companion to the Repair manual TM2070 - it does not cover teardown or torque specs for assembly, but gives you everything needed to test and confirm a failure before removing any parts.
Complete the set for your 7220-7520
What's Inside This John Deere 7220-7520 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety and General References | Safety Measures, Bolt and Cap Screw Torque Tables, Hydraulic Fitting Torque Values, How to Read a Functional Schematic, Wire Numbers and Color Codes, Seven Step Electrical Test Procedure | |
| Diagnostic Trouble Codes | Atc (ClimaTrak), Bcu (Basic Control Unit), Bif (Basic Informator), ECU (Engine Control Unit), Epc (PowrQuad-Plus), Jdl (JDLink), Plc (Park Lock), Prf (Performance Monitor), Sfa (MFWD and Cab Suspension), Sic (E-SCV/E-ICV), Ssu (AutoTrac), Tcu (AutoPowr/IVT), Tec (Tractor Equipment Controller), Uic (User Interface Controller) | |
| Observable Symptoms | Engine Symptoms, Electrical System Symptoms, Transmission Symptoms, Drive System Symptoms, Steering and Brake Symptoms, Hydraulic System Symptoms, Operator Cab Symptoms | |
| System Diagnostics - Electronics | CAN Bus Diagnostics, 29-Bit CAN Bus Checks, Data Bus System Verification | |
| Engine | Engine Wiring References, Preliminary Engine Tests, Dynamometer Test Procedure, Distinguishing Engine Control Units (Level 4 ECU / Bosch VP44 vs Lucas Injection) | |
| Fuel, Air Intake and Cooling Systems | Air Intake System Test, Cooling System Leak Test, Low-Temperature Circuit Flow Test (AutoPowr and PowrQuad Variants), Thermostat Opening Temperature Test, Viscous Fan Drive Test, Fuel Transfer Pump Check, Hand Throttle and Accelerator Pedal Adjustment | |
| Electrical System | Sub-System Diagnostics, Component Testing, Functional Schematics (AutoPowr/IVT and PowrQuad-Plus), Functional Schematics (Open Operator Station), Wiring Harnesses, Wiring Harnesses From Serial No. 12451 | |
| Electronic Control Units | General Operating Instructions, Accessing Addresses and DTCs, Data Bus Systems Diagnostics, CAN Bus Theory of Operation, Per-ECU Diagnostic Address Tables | |
| AutoPowr / IVT Transmission | Operational Checkout, Tests and Adjustments, Come Home Mode Diagnostics, Transmission Operation Theory | |
| PowrQuad and PowrQuad-Plus Transmissions | Introductory Checks, Operational Checkout, Tests and Adjustments, Transmission Operation | |
| Drive Systems | Operational Checks, Tests and Adjustments, Drive System Operation | |
| Steering and Brakes | Introductory Checks, Operational Checkout, Tests and Adjustments, Steering and Brake Operation | |
| Hydraulic System | Pfc Hydraulic System Load Check, Hitch Operational Checkout, SCV Operational Checkout, Hydraulic Pump Pressure and Delivery Rate Tests, Charge Pump Lube Oil Pressure, Ls Pressure Check, Rockshaft Valve Tests, Power Beyond Valve Adjustment, SCV Leak Tests, Pfc Hydraulic System Theory of Operation, Shuttle Valves, Priority Valve, Selective Control Valves | |
| MFWD | Operational Checkout, Tests and Adjustments, MFWD Operation | |
| Operator's Cab | Operational Checks, Tests and Adjustments, Cab System Theory of Operation | |
| Special Tools | Dealer-Fabricated Tools, Special Tools and Test Equipment List |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All models | ||
| Max PFC Hydraulic System Pressure | 19500-20500 kPa (195-205 bar / 2830-2970 psi) | |
| Min System Pressure (Standby) | 2800-3300 kPa (28-33 bar / 406-479 psi) | |
| Min LS (Load-Sensing) Pressure | 200-600 kPa (2-6 bar / 29-87 psi) | |
| Hydraulic Pump Min Delivery Rate | 100 L/min (26.4 gpm) | |
| Min Lube Oil Pressure (Charge Pump) | 100 kPa (1 bar / 14.5 psi) | |
| Cooling System Test Pressure | 50-60 kPa (0.5-0.6 bar / 7-8.7 psi) | |
| Expansion Tank Cap Opening Pressure | 70-90 kPa (0.7-0.9 bar / 10-13 psi) | |
| 7220, 7320, 7420 | ||
| EPC Enable Pressure (7220-7420) | 1400 kPa (14 bar / 203 psi) | |
| 7520 | ||
| EPC Enable Pressure (7520) | 1750 kPa (17.7 bar / 254 psi) | |
| 7220, 7320, 7420, 7520 Tier II engines | ||
| Fuel Transfer Pump Flow Rate (Tier II engine) | 100 L/hr (26.4 US gal./hr) | |
