Part of the John Deere Repair Manuals.
A worklight circuit that dies at dusk, or a starter that clicks once in a cold shed: that hunt ends with the John Deere 2155 to 3255 Operation and Tests supplement PDF, 231 pages (TM4436SUPPL) covering nine tractor models from the 2155 through the 3255. Wiring diagrams fill the bulk of this book, drawn separately for tractors with and without SGB and split at the serial number breaks, so the engine, dash, transmission and fender harnesses on the page match the ones in your hand. Circuit diagnosis groups take the starting motor, charging, cold weather starting aids, fuel preheater and front PTO circuits from symptom to test point. Charge the R134a system to 1.8 kg; expect 3 ohms across the compressor clutch coil and 2.5 amps draw. One invented pressure figure costs you a compressor. Bookmarks and a searchable text layer land you on the right circuit group in a minute, not an evening while the field waits.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Notice to Dealers | 2 | Technical Manual Revision, Tractor Models, Revised Groups, Additional Group |
| Electrical Diagrams W/O SGB | 5-30 | Parts Designations, Wiring Harness Designations, Electrical Circuit Diagrams, Instrument Cluster |
| Circuit Diagnosis W/O SGB | 31-60 | Starting Motor Circuit, Charging Circuit, Cold Weather Starting Aids, Fuel Preheater, Lighting and Worklights |
| Electrical Diagrams GPT W/O SGB | 61-84 | Parts Designations, Wiring Harness Designations, Electrical Circuit Diagrams, Instrument Cluster |
| Circuit Diagnosis GPT W/O SGB | 85-126 | Starting Motor Circuit, Charging Circuit, Cold Weather Starting Aids, Lighting and Worklights, Front Wheel Drive |
| Electrical Diagrams with SGB | 127-158 | Parts Designations, Wiring Harness Designations, Electrical Circuit Diagrams, Dash Panel Wiring |
| Circuit Diagnosis with SGB | 159-198 | Starting Motor Circuit, Charging Circuit, Cold Weather Starting Aids, Fuel Preheater, Blower Fan, Air Conditioning |
| Operator Station | 199-231 | Air Conditioning System R134a |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Compressor clutch coil resistance | 3 ohms | p. 211 |
| Compressor clutch coil current draw | 2.5 amps | p. 211 |
| Refrigerant R134a Capacity | 1.8 kg | p. 211 |
| Compressor Suction Pressure (800-2000 rpm) | 700 to 2100 kPa | p. 211 |
| Compressor Discharge Pressure (800-2000 rpm) | 7 to 240 kPa | p. 211 |
| Compressor Relief Valve Opening Pressure | 3000 kPa | p. 211 |
| Full Charge of Oil (PAG oil) | 312 cm³ | p. 211 |
| Temperature Control Switch Low Limit | -1°C | p. 211 |
| Temperature Control Switch High Limit | +3°C | p. 211 |
