Tearing down a Kobelco SK27SR-3 hydraulic excavator and returning it to factory tolerance is the job all 746 pages of publication S5PV0006ZE-01 are written around. Hydraulic circuit operation fills a large share of this Kobelco SK27SR-3 service manual PDF, with circuit diagrams tracing pump flow to the boom and arm cylinders, travel motors and swing motor, and wiring diagrams covering the electrical side. Disassembly is the biggest section (attachments, upper slewing structure, travel system), and the engine takes close to a third of the book, from inspection and adjustment through to troubleshooting. Set main relief on P1 and P2 to 23.0 MPa (3340 psi) at 26.4 L/min, and fit a 30µ return filter. Guess wrong on that setting and you could be paying for a pump and a second teardown. Bookmarks and a text layer make your search quick, and any section prints cleanly for the bench, where grease on the page costs nothing.
What's Inside This Kobelco SK27SR-3 Manual
| System | Pages | Key Topics |
|---|
| Specifications | 16-61 | Machine Dimensions, Specifications and Performance, Machine and Components Weight |
| Maintenance | 62-91 | Standard Maintenance Time Table |
| System | 92-247 | Hydraulic Circuit Operation, Hydraulic Circuit |
| Disassembling | 248-475 | General Disassembly and Assembly, Attachments, Upper Slewing Structure, Travel System |
| Troubleshooting | 476-509 | Trouble Diagnosis Hydraulic, Attachment Troubleshooting, Travel Operation Troubleshooting |
| Engine | 510-725 | Engine Specifications, Inspection and Adjustment, Troubleshooting Engine |
| Supporting Data | 726-746 | Installation Procedures for Optional Attachment, Hydraulic Circuit Diagram |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Intermediate Torque (Net) | 79.0~86.0 N·m (58.3~63.4 lbf·ft) | p. 20 |
| Return Filter | 30µ | p. 22 |
| Metric Coarse Thread Standard Tightening Torque (M36, 10.9T, No lubrication) | 4010 ± 402 N·m | p. 53 |
| Relief valve set pressure | 3.5 MPa (508 psi) | p. 97 |
| Setting pressure at main relief valve P1, P2, P3 | 23.0 +0.5 MPa (3340 +72 psi) at 26.4 L/min (7.0 gal/min) (MR1, MR2) | p. 176 |
| Engine oil filter tightening torque | 20~24 N·m (2.0~2.4 kgf·m) | p. 724 |
| Fuel filter tightening torque | 20~24 N·m (2.0~2.4 kgf·m) | p. 724 |
| Engine Oil Capacity (3TNV82A) | 5.5L | p. 551 |
| Engine Oil Capacity (3TNV84/88) | 6.7L | p. 530 |
| Engine Oil Capacity (4TNV94L/98) | 10.2L | p. 536 |
| Engine Oil Capacity (4TNV106) | 14.0L | p. 539 |
| Main Relief Valve Pressure (P1, P2) | 23.0 ± 0.6 MPa | p. 76 |
