Komatsu SAA6D114E-3 Diesel Engine Workshop Service Manual PDF
The Komatsu SAA6D114E-3 Series is an 8.27L heavy-duty, six-cylinder turbocharged diesel engine deployed in frontline earthmoving equipment, including Komatsu PC300-7, PC300LC-7, PC350-7, and PC350LC-7 hydraulic excavators, as well as WA380-5 wheel loaders and GD655-3 motor graders. This official 342-page Workshop Service & Shop Manual provides complete teardown, inspection, reassembly tolerances, common rail fuel system diagnostics, and multi-stage bolt torque protocols.
⚙️ Komatsu SAA6D114E-3 (8.3L) Factory Technical Specifications
| Engine Specification | Factory OEM Tolerance & Data |
|---|---|
| Cylinder Configuration | 6-Cylinder In-Line, 4-Cycle, Water-Cooled Heavy Duty Diesel |
| Total Displacement | 8.27 Litres (505 cu. in.) |
| Bore x Stroke | 114.0 mm x 135.0 mm (4.49 in x 5.31 in) |
| Aspiration System | Turbocharged with Air-to-Air Charge Air Cooler (ATAAC) |
| Combustion & Fuel Injection | Direct Injection High-Pressure Common Rail (HPCR) up to 1,600 bar |
| Firing Order | 1 – 5 – 3 – 6 – 2 – 4 (Cylinder 1 at cooling fan / front pulley) |
| Compression Ratio | 17.5:1 |
| Cold Valve Lash Clearance | Intake: 0.30 mm (0.012 in) | Exhaust: 0.58 mm (0.023 in) |
| Lube Oil Capacity | 24.0 – 28.0 Litres (oil pan dependent) |
| Primary Machine Applications | Komatsu PC300-7, PC300LC-7, PC350-7, PC350LC-7 Excavators, WA380-5 Loaders |
🔧 Komatsu SAA6D114E-3 Multi-Stage Fastener Torque-Angle Tightening Protocol
Clean all bolt threads and lightly lubricate with clean engine oil prior to assembly. Follow the manufacturer spiral sequence:
| Fastener Assembly | Stage 1 Preload | Stage 2 Torque | Final Tightening Angle |
|---|---|---|---|
| Cylinder Head Bolts (M14) | 54 N·m (40 lbf·ft) | 149 N·m (110 lbf·ft) | Tighten +90° Angle |
| Connecting Rod Bearing Cap Bolts | 34 N·m (25 lbf·ft) | 73 N·m (54 lbf·ft) | Tighten +60° Angle |
| Main Bearing Cap Bolts | 68 N·m (50 lbf·ft) | 136 N·m (100 lbf·ft) | Tighten +90° Angle |
| Crankshaft Front Vibration Damper Bolt | 203 N·m (150 lbf·ft) | — | 203 N·m (150 lbf·ft) |
| Flywheel Housing Mounting Bolts | 77 N·m (57 lbf·ft) | — | 77 N·m (57 lbf·ft) |
| Common Rail Injector Hold-Down Clamp | 35 N·m (26 lbf·ft) | — | 35 N·m (26 lbf·ft) |
| High Pressure Fuel Delivery Pipes | 30 N·m (22 lbf·ft) | — | 30 N·m (22 lbf·ft) |
🛠️ Free Diesel Engineering Calculators
Planning a heavy plant engine rebuild or cylinder head torque verification? Use our free workshop suite for instant bolt torque conversions (Nm to lb-ft, kgf-m), fuel burn calculation, and displacement formulas:
📑 Workshop Manual Table of Contents & Service Chapters
- Chapter 01: General Information & Technical Standards – Engine serial number identification, standard overhaul clearance tables, special workshop service tools, and tightening standards.
- Chapter 11: Structure and Function – Cylinder block design, gear train arrangement, valve mechanism, EGR cooler layout, and Common Rail fuel flow diagram.
- Chapter 12: Testing and Adjusting – Compression pressure testing, blow-by pressure measurement, valve clearance cold adjustment, fuel pressure testing, and belt tension checks.
- Chapter 13: Disassembly and Assembly – Cylinder head removal and overhaul, piston and connecting rod assembly, crankshaft removal, camshaft end play calibration, and front gear housing.
- Chapter 14: Common Rail Electronic Fuel System – Supply pump removal/installation, fuel rail pressure limiter valve, electronic injector flow testing, and electronic control system harness troubleshooting.
- Chapter 15: Troubleshooting by Failure Symptom – Diagnostic fault tree for engine failure to crank, low power under hydraulic load, excessive black/white exhaust smoke, and abnormal engine vibration.
✅ Direct Workshop PDF Download
Official searchable workshop manual. Clean PDF format with zero third-party software, installers, or download managers.
⬇️ Download Komatsu SAA6D114E-3 Manual PDF (11.61 MB)
Direct file delivery: .PDF format only | No executable (.exe) or installation required
