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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 |
John Deere 550LC Common Problems This Manual Covers
John Deere 550LC engine cranks slow and won't start in cold weather, gauges flicker
Test each battery under load; a healthy unit shows 12 volts and 890 cold cranking amps at -18°C (0°F). Check electrolyte specific gravity, 1.265 to 1.280 fully charged, per the specs on page 307. Clean and tighten both ground connections, then torque the hold-down bracket nuts to 20 N•m (177 lb-in.).
Manual Section: Electrical System p. 307Engine overheats under load, temperature gauge climbs into the red within an hour
Blow out the radiator cores and cooling fins with compressed air from the fan side, then pull the air filter element and check the restriction indicator. Inspect intake boots for cracks and torque the air intake clamps to 8.5 N•m (75 lb-in) as shown on page 283. Verify coolant level with the engine cold.
Manual Section: Engine Auxiliary System p. 283Track loose and slapping the frame, machine throws a track turning on soft ground
Measure track sag between the carrier roller and front idler; the spec on page 110 is 440 to 490 mm. Add grease to the track adjuster cylinder to tighten, or crack the fitting slowly to release it. While you are under there, check shoe hardware and torque loose shoe-to-chain cap screws to 1370 N•m.
Manual Section: Tracks p. 110Milky hydraulic oil and metal flakes in the filter, cylinders drift down under load
Cut open the hydraulic oil filter and inspect it for water contamination and metal particles using the procedure on page 500; brass or steel flakes point to pump or cylinder packing failure. Drain and refill the hydraulic tank with 254 L of clean oil, then torque the pilot filter case to 19.5 to 29.5 N•m.
Manual Section: Excavator p. 500Battery light stays on, alternator belt squeals at high idle, batteries discharge overnight
Check alternator belt strand tension against the specs on page 318: a used belt should hold 270 to 490 N, a new belt 620 N. Adjust at the adjusting link and torque its cap screw to 68 N•m (50 lb-ft). Load-test both batteries and clean the ground strap before condemning the alternator.
Manual Section: Electrical System p. 318Frequently Asked Questions
How to reset John Deere 550LC error codes?
To reset the Air Conditioner Controller, turn the key switch OFF. This procedure is part of the Air Conditioner Self-Diagnostic Procedure, which indicates problems with sensor circuits in the air conditioning system. p. 417
What are the torque specs for John Deere 550LC final drives?
For the propel gearbox (final drive), the gearbox-to-track frame cap screws should be torqued to 740 N•m (540 lb-ft). The drum and bearing-to-housing nut requires a torque of 785 N•m (580 lb-ft), while the lock plate-to-nut cap screws are torqued to 88 N•m (65 lb-ft). p. 167
How to reset John Deere 550LC idle speed?
To reset the idle speed, first ensure the engine is warmed to normal operating temperature. The slow idle speed should be between 800—1000 rpm and the fast idle speed between 2000—2100 rpm. Adjust the gap between the throttle lever and stop screw to 0.1—0.3 mm (0.004—0.012 in.) to set the speeds. p. 275
How to reset John Deere 550LC controller
To reset the Engine Controller (EC) and Pump and Valve Controller (PVC) programming after battery disconnection, turn the key switch OFF and then ON without starting the engine. Then, turn the engine rpm dial to fast idle and push the S/P (super power) switch, waiting 4—5 seconds for the EC motor to move the engine speed control linkage to the fast idle stop. p. 279
What are the fluid capacities for the John Deere 550LC Excavator?
The John Deere 550LC Excavator has a fuel tank capacity of 700 L (185 gal) and a cooling system capacity of 66.2 L (17.5 gal). The engine oil capacity, including the filter change, is 44.0 L (11.5 gal), and the hydraulic tank oil capacity is 254 L (67 gal). p. 29
What format is this manual in?
Instant PDF download. You get the full 672-page searchable Repair Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Am I able to print pages from this manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
