Travel deviation, sluggish boom speed or a service code can stall a crew for a day while someone hunts for the cause, and the Komatsu PC150-6K, PC150LC-6K shop manual PDF (OEM ID CEBM001601) answers it with 617 pages of factory data for both hydraulic excavators. Troubleshooting claims the largest share of the book, split into E, C, F and H modes so a fault traces to the governor and pump controller, an input pressure switch, or the hydraulic circuit. Hydraulic schematics follow CLSS flow from pump to control valve, wiring diagrams map the controller harnesses, and the disassembly chapter takes the final drive and swing machinery apart and back together. Set main relief at 31.4 to 34.8 MPa; with the engine above half throttle, your alternator should read 27.5 to 29.6 V. A guessed pressure switch costs the part, the freight and a second teardown. The bookmarked, searchable PDF lets you find the failed component before ordering anything.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| General | 10-20 | Specifications, Weight Table, Fuel, Coolant and Lubricants |
| Structure and Function | 21-182 | Engine Related Parts, Hydraulic Pump, Control Valve, Clss |
| Testing and Adjusting Procedures | 183-230 | Standard Values, Belt Tension, Engine Speed Sensor, Hydraulic Pressure Testing, Oil Leakage Measurement, Air Bleeding |
| Troubleshooting Introduction and Procedures | 231-276 | Troubleshooting Sequence, Electrical System Precautions, Service Code Table, Communication Abnormality System, Monitor Panel Display |
| Governor and Pump Controller Troubleshooting (E and C Modes) | 277-363 | E-Mode Troubleshooting, Engine Starting Issues, Engine Speed Irregularities, C-Mode Troubleshooting, Pump TVC Solenoid System |
| Input Signal System Troubleshooting (F Mode) | 364-377 | F-Mode Troubleshooting, Bit Pattern Analysis, Swing Oil Pressure Switch, Travel Oil Pressure Switch, Boom/Arm/Bucket Pressure Switches |
| Hydraulic and Mechanical System Troubleshooting (H Mode) | 378-414 | H-Mode Troubleshooting, Work Equipment Speed Issues, Travel Deviation, Swing System Issues, Machine Monitor System Troubleshooting |
| Disassembly and Assembly | 446-578 | Special Tool List, Final Drive Assembly, Swing Machinery Assembly |
| Maintenance Standard | 579-617 | Idler, Track Roller, Control Valve |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Additional filter for breaker rated pressure | 6.86 MPa | p. 126 |
| Additional filter for breaker relief valve cracking pressure | 0.34 ± 0.049 MPa | p. 126 |
| Battery voltage (engine stopped) | 20 - 30 V | p. 241 |
| Alternator voltage (engine running at over half throttle) | 27.5 - 29.6 V | p. 241 |
| Main pump relief pressure | 31.4 - 34.8 MPa (320 - 355 kg/cm²) | p. 383 |
| LS control EPC valve output pressure | 0.2 ± 0.2 MPa (2 ± 2 kg/cm²) | p. 383 |
| Tightening torque for flared nuts (14 mm thread diameter) | 2.5 ± 0.5 kgm (24.5 ± 4.9 Nm) | p. 449 |
| Tightening torque for flared nuts (18 mm thread diameter) | 5 ± 2 kgm (49 ± 19.6 Nm) | p. 449 |
| Swing circle mounting bolt tightening torque | 490-608 Nm | p. 583 |
| Main Relief Valve Tightening Torque | 98.1 ± 9.8 Nm | p. 489 |
| Track Shoe Tension Clearance | 303 ± 20 mm | p. 207 |
