Bringing a high-hour PC400-6 series hydraulic excavator back to Komatsu standard values is the job these 892 pages of shop manual SEBM014507 were written for, across four variants. Testing and Adjusting fills the largest share of this Komatsu PC400-6, PC400LC-6, PC450-6, PC450LC-6 shop manual PDF with standard value tables for engine and chassis parts, while Structure and Function traces the piping, hydraulic pump and control valve. Disassembly and Assembly walks you through the fuel injection pump and oil cooler, Maintenance Standard sets wear limits for swing machinery and final drive, and the back of the book holds the hydraulic and electric circuit diagrams. Confirm the PPC hydraulic switch turns on at 0.5 ± 0.1 MPa and resets at 0.3 ± 0.05 MPa. A dead pilot circuit with no diagram costs a full shift. Bookmarks put you on the circuit diagrams or any standard value table in seconds, and a keyword search finds the part name you type.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| General | 1-48 | Specification Drawings, Specifications, Fuel, Coolant and Lubricants |
| Structure and Function | 49-273 | Hydraulic Piping Drawing, Hydraulic Pump, Control Valve |
| Testing and Adjusting | 274-599 | Standard Value Table for Engine Related Parts, Standard Value Table for Chassis Related Parts |
| Disassembly and Assembly | 600-823 | Special Tool List, Engine Oil Cooler, Fuel Injection Pump |
| Maintenance Standard | 824-879 | Engine Mount, Swing Machinery, Final Drive |
| Others | 880-892 | Hydraulic Circuit Diagram, Electric Circuit Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Suction cracking pressure | 0 - 0.49 kPa | p. 67 |
| Bypass valve set pressure | 102.9 ± 19.6 kPa | p. 67 |
| Relief cracking pressure | 16.7 ± 6.9 kPa | p. 67 |
| PPC hydraulic switch Actuation (ON) pressure | 0.5 ± 0.1 MPa | p. 257 |
| PPC hydraulic switch Reset (OFF) pressure | 0.3 ± 0.05 MPa | p. 257 |
| TVC prolix resistor resistance | 8.5 Ω | p. 259 |
| Muffler band | 9.8 ± 2.0 Nm | p. 623 |
| Hose clamp | 4.4 ± 0.5 Nm | p. 623 |
| Hydraulic tank mounting bolt | 277.0 ± 31.9 Nm | p. 729 |
| Piston | 475.6 ± 34.3 Nm | p. 737 |
| Hydraulic tank | 280 L | p. 730 |
| Damper case | 1.1 L | p. 744 |
