Before you crack a fitting on the swing machinery or pull a track roller today, open the Komatsu PC60-6, PC60L-6, PC90-1 shop manual PDF: 451 factory pages, OEM ID SEBM02010607, for all three hydraulic excavators. Hydraulic schematics trace the piping from pump through control valve to boom, arm and bucket cylinders, and wiring diagrams map the harness circuit by circuit. Structure and Function explains each system; Testing and Adjusting, a third of the book, carries standard value tables and troubleshooting charts; Disassembly and Assembly takes the pump, swing machinery and cylinders apart; Maintenance Standard sets wear limits on swing circle, track rollers and control valve. Set PPC valve disc-to-piston clearance at 0.3 to 0.5 mm, and run 12 mm bolts to 112 ± 9.8 Nm. A misread pump fault means a second teardown and a crew parked all day. The bookmarked, text-searchable PDF helps you confirm what failed, so the first part you order is the right one.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Structure and Function | 16-133 | Engine Mount and Related Parts, Swing Machinery, Track Frame, Hydraulic Piping |
| Testing and Adjusting | 134-290 | Standard Value Table, Troubleshooting |
| Disassembly and Assembly | 291-400 | Engine Related Parts, Hydraulic Pump Assembly, Swing Machinery Assembly, Hydraulic Cylinder Assembly |
| Maintenance Standard | 401-451 | Swing Circle Standard, Track Frame Standard, Track Roller Standard, Control Valve Standard |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Standard tightening torque for 6mm bolt | 1.35 ± 0.15 kgm (13.2 ± 1.4 Nm) | p. 10 |
| Standard tightening torque for 8mm bolt | 3.2 ± 0.3 kgm (31.4 ± 2.9 Nm) | p. 10 |
| Hydraulic tank relief set pressure | 0.39 ± 0.15 kg/cm² | p. 37 |
| Hydraulic tank suction set pressure | 0 - 0.046 kg/cm² | p. 37 |
| Clearance between disc and piston (PPC valve) | 0.3 - 0.5 mm | p. 167 |
| Spring installed load (Servo piston) | Approx. 60 kg | p. 352 |
| Spring installed load (Cylinder block) | Approx. 130 kg | p. 353 |
| Clearance between rotor and shaft (PC60-6, 60L-6, PC90-1) | 0.056 - 0.105 mm | p. 443 |
| Clearance between rotor and shaft (PC60-6 with blade) | 0.056 - 0.105 mm | p. 443 |
| PPC Valve Pilot spring free length x O.D. | 12.6 x 3.85 mm | p. 444 |
| Engine Oil Pan Capacity (Specified) | 8.0L | p. 15 |
| Engine Oil Pan Capacity (Refill) | 7.0L | p. 15 |
