Part of the John Deere Repair Manuals.
Need factory answers for your John Deere 550LC? This 672-page John Deere 550LC Repair Manual PDF (OEM TM1808) walks you through every system on the excavator, from track rollers and propel gearboxes to the 14L Cummins N14 engine and swing bearing. Inside: a full torque section, exploded views of the undercarriage and major assemblies, step-by-step rebuild procedures for the propel motor, pilot pump, and swing gearbox, plus troubleshooting and error code charts. You even get dealer fabricated tool drawings, so you can build the DFT1075 gearbox nut wrench yourself instead of hunting one down. Torque the air intake clamps to 8.5 N-m (75 lb-in) and set injector and valve clearances straight from the factory tables. Your 550LC is dead weight until it swings. Bookmarked and text-searchable; type the spec, find the page, fix the machine.
What's Inside This John Deere 550LC Repair Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 9-102 | Safety (550LC Excavator Overview, 550LC Excavator, Working Ranges) |
| Tracks | 103-162 | Track Roller, Track Carrier Roller, Track Shoe, Track Chain, Sprocket, Front Idler |
| Axles and Suspension Systems (Propel) | 163-222 | Propel Gearbox, Propel Motor and Brake, Counterbalance Valve, Rotary Manifold, Propel Flow Regulator |
| Engine | 223-250 | Cummins N14 Series 14L (875 Cu in.) Engine: Removal and Installation, Crankcase Ventilation Tube, Injection Lines, Engine Mounts |
| Engine Auxiliary System | 251-290 | Cold Weather Starting Aids, Cooling Systems, Speed Controls, Intake System, External Exhaust Systems |
| Connector Drive | 291-294 | Pump Drive Coupling, Drive Shaft and Damper, Alignment and Torque Values |
| Transfer or Splitter Drive | 295-304 | Pump Drive Gearbox, Gear and Bearing Service, Lubrication and Seals |
| Electrical System | 305-348 | Batteries, Alternator, Wiring Harness, Fuses, Key Switch, System Controls |
| Frame or Supporting Structure | 349-370 | Welding on Machine, Welding Repair of Major Structure, Counterweight |
| Operator's Station | 371-418 | Cab, Windowpane, Sliding Windows, Seat, Seat Belt, Heater Core and Evaporator |
| Safety and Convenience | 419-422 | Safety |
| Excavator | 423-600 | Buckets, Frames, Hydraulic Pump, Pilot Pump, Pilot Shut-Off Valve, Hydraulic Oil Cooler |
| Swing or Pivoting System | 601-656 | Swing Gearbox, Upperstructure, Swing Bearing, Swing Motor and Brake, Crossover Relief Valves, Swing Brake Release Solenoid Valve |
| Dealer Fabricated Tools | 657-672 | Rotary Manifold Lifting Tool, DFT1075 Propel Gearbox Nut Wrench, DFT1077 Spool Holding Fixture |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Batteries, Support, and Cables | Group 1671 | p. 5 |
| Wiring Harness and Switches | Group 1674 | p. 5 |
| Cooling Systems | Group 0510 | p. 5 |
| Oil Filters | Filtration of oils is critical to proper operation and lubrication. Always change filters regularly as specified in this manual. Use filters meeting John Deere performance specifications. | p. 62 |
| Air Intake Leakage Clamps Torque | 8.5 N•m (75 lb-in) | p. 283 |
| Battery-Voltage | 12 Volts | p. 307 |
| Alternator Locking Cap Screw-Torque | 68 N•m (50 lb-ft) | p. 318 |
| Alternator Mounting Cap Screw-Torque | 108 N•m (80 lb-ft) | p. 318 |
| Air Filter Restriction Switch | B1 | p. 327 |
| Fuel Shutoff Solenoid | Y7 | p. 327 |
| Engine Oil Pressure Switch | B4 | p. 327 |
| Engine and Frame Harness-to-Ground | W6 | p. 327 |
