A weeping arm cylinder, a sluggish travel motor or a hard-starting engine all point to the same book: the Kobelco SK55SRX service manual PDF, 979 pages of factory data for this crawler excavator, published under OEM ID S5PS0001E01. Hydraulic schematics trace oil from the pumps to the boom, arm, bucket, swing and travel circuits, and wiring diagrams lay out the electrical harnesses that the troubleshooting charts send you back to. Disassembly is the largest section. It covers taking apart and reassembling the attachments, the upper slewing structure and the travel system. Close to two-fifths of the book covers the engine: EGR, injection timing, cooling, lubrication, turbocharger and starter motor. Hold bucket cylinder head-side clearance to 0.5 to 0.9 mm, and torque an unlubricated M6 4.8T bolt to 4.4 ± 0.5 N·m. Chasing a hydraulic fault blind can eat a full day. Bookmarks and keyword search take you to the right page quickly, so the machine is digging again sooner.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| Specifications Section | 8-57 | Outline, Specifications, Attachment Dimensions |
| Maintenance Section | 58-105 | Tools, Standard Maintenance Timetable, Maintenance Standard and Test Procedure |
| System Section | 106-279 | Hydraulic System, Electrical System, Components System, Air-Conditioner System |
| Disassembly Section | 280-551 | General Disassembly and Assembly, Attachments, Upper Slewing Structure, Travel System |
| Troubleshooting | 552-585 | Troubleshooting Hydraulic System, Troubleshooting Electrical System, Troubleshooting Engine |
| Engine Introduction and Specifications | 586-647 | Engine Models, Engine General Specifications, Principal Engine Specifications, Engine Speed Specifications |
| Engine Service Standards | 648-719 | Periodic Maintenance Schedule, Periodic Maintenance Procedures, Engine Oil and Filter Replacement |
| Engine Disassembly and Assembly | 720-784 | Cylinder Head Specifications, 2-Valve Cylinder Head, 4-Valve Cylinder Head, Rocker Arm Assembly, Crankshaft and Camshaft Components |
| EGR System | 785-827 | EGR System Components, EGR Valve Inspection, EGR Cooler Cleaning, Crankcase Breather System |
| Fuel System | 828-871 | Fuel Injection Pump, Fuel Injectors, Fuel System Diagram, Fuel Injection Timing Adjustment |
| Cooling System | 872-885 | Cooling System Diagram, Engine Coolant Pump, Thermostat, Radiator Cap |
| Lubrication System | 886-905 | Lubrication System Diagram, Trochoid Oil Pump, Oil Pump Service Information, Oil Pressure Check |
| Turbocharger and Starter Motor | 906-979 | Turbocharger Components, Turbocharger Troubleshooting, Starter Motor Specifications, Starter Motor Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Metric Coarse Thread Standard Tightening Torque Values (M6, 4.8T, No lubrication) | 4.4 ± 0.5 N·m | p. 60 |
| Metric Coarse Thread Standard Tightening Torque Values (M6, 4.8T, Oil lubrication) | 3.7 ± 0.4 N·m | p. 60 |
| Starting Motor | 12 V x 2.3 kW | p. 23 |
| Harness end treatment length | 30 ± 10 mm | p. 140 |
| Clearance X for Bucket cylinder (Head side) (E-E) | 0.5~0.9mm (0.020~0.035") | p. 46 |
| Clearance X for Arm cylinder (Rod side) (G-G) | 0.5~0.9mm (0.020~0.035") | p. 46 |
| Main relief valve (MRV1, MRV2) pressure adjustment (one full turn) | 17.7 MPa (2567 psi) | p. 94 |
| Main relief valve (MRV3), Overload relief valve pressure adjustment (one full turn) | 28.4 MPa (4118 psi) | p. 94 |
| Engine Output Rating | 29.1/2,400 kW/min-1 {PS/rpm} | p. 23 |
| Engine Oil Volume (Max/Effective) | 7.4 / 4.0 liter | p. 32 |
| Cooling Water Capacity (Max/Engine) | 6.0 / 2.7 liter | p. 32 |
| Dozer Stroke (above/below) | 497 / 373 mm | p. 23 |
