| Parameter | Specification |
|---|---|
| COGENG Part Number | 6211-12-3600 |
| OEM Equivalent | Komatsu 6211-12-3600 |
| Engine Compatibility | Komatsu SA6D140E-2 |
| Product Type | Unit Injector (Mechanical) |
| Interchange Numbers | 6211-12-3600, 6211-12-3601 |
| Parameter | Specification |
|---|---|
| Injection Type | Direct Injection (DI) |
| Actuation | Mechanical - Cam Driven |
| Fuel Pressure | 1,200 - 1,600 bar |
| Hole Configuration | 5 holes x 0.18mm |
| Spray Angle | 145 degrees |
| Flow Rate | 420 cc/min @ 100 bar |
| Parameter | Specification |
|---|---|
| Overall Length | 185 mm |
| Body Diameter | 21 mm |
| Thread Size | M14 × 1.5 |
| Hold Down Bolt | M8 × 40 mm |
| Nozzle Type | DN0SD 306 |
| Weight | 0.65 kg |
| Component | Material Specification |
|---|---|
| Injector Body | Case-hardened Alloy Steel |
| Nozzle Needle | High-speed Tool Steel |
| Plunger/Barrel | Martensitic Stainless Steel |
| Sealing Washer | Copper (Annealed) |
| O-rings | Viton (High-temp resistant) |
| Equipment Model | Application |
|---|---|
| PC300-5 | Hydraulic Excavator |
| PC300LC-5 | Long Track Excavator |
| PC350-5 | Hydraulic Excavator |
| PC350LC-5 | Long Track Excavator |
| PC400-5 | Large Excavator |
| D275A-3 | Bulldozer |
| D375A-3 | Large Bulldozer |
| HD465-5 | Articulated Dump Truck |
| HD485-5 | Large Dump Truck |
| WA380-3 | Wheel Loader |
| WA420-3 | Large Wheel Loader |
Precision Fuel Metering: Consistent fuel delivery across all RPM ranges |
| Superior Atomization: 5-hole nozzle for optimal combustion |
| Durable Construction: Case-hardened body for extended service life |
| Direct Replacement: Exact OEM fit, no modifications required |
Individual Testing: Each injector tested for spray pattern, flow rate, and sealing |
| 100% Quality Control: Dimensional and performance verification |
| Traceability: Batch and date coding on each unit |
| Certifications: ISO 9001:2015 quality system |
| Parameter | Specification |
|---|---|
| Tools Required | Injector puller, torque wrench, depth gauge |
| Torque (Hold Down Bolt) | 55-60 Nm |
| Torque (Fuel Connection) | 30-35 Nm |
| Torque (Return Connection) | 20-25 Nm |
Remove rocker cover and injector rocker arm
Extract old injector using puller tool
Clean injector bore thoroughly
Replace copper sealing washer
Lubricate O-rings with clean engine oil
Insert new injector to correct depth
Torque hold down bolt to specification
Install rocker arm and adjust valve clearance
Check for fuel leaks after engine start
Calibration Required: Injectors are pre-set; no adjustment needed |
| Sealing Washer: Always replace with new unit |
| Cleanliness: Critical for injector longevity |
| Fuel Filtration: Minimum 5-micron filtration recommended |
| Symptom | Potential Cause |
|---|---|
| Rough idle | Worn nozzle, blocked holes |
| Black smoke | Poor atomization, incorrect timing |
| Poor power | Low injection pressure |
| Hard starting | Leaking injector, worn plunger |
| Engine knock | Sticking needle, improper seating |
Replace interval: 8,000-10,000 hours
Fuel quality: Use ultra-low sulfur diesel
Filtration: Replace primary and secondary filters regularly
Additives: Use fuel conditioner for injector protection
| Parameter | Specification |
|---|---|
| MOQ | 6 pieces (1 engine set) |
| Package Type | Individual anti-static tube |
| Master Carton | 6 injectors + 6 sealing washers |
| Carton Dimensions | 25×20×15 cm |
| Carton Weight | 4.5 kg |
| Lead Time | 7-15 days |
Frequently Asked Questions
Q: What are symptoms of a failing fuel injector on a Komatsu SA6D140E-2 engine?
A: Common signs include excessive black smoke under load, noticeable loss of engine power, rough idling or misfiring, increased fuel consumption, and difficulty starting. A faulty injector can also cause fuel dilution in the engine oil, leading to accelerated wear.
Q: What equipment uses the Komatsu SA6D140E-2 engine?
A: The SA6D140E-2 engine powers a wide range of Komatsu heavy equipment, including PC400-6, PC400-7, PC400-8, PC450-7, PC450-8 excavators, D155A-6 dozers, and WA600-6 wheel loaders. Verify your machine's engine model to confirm compatibility.
Q: Should I replace all six injectors at once?
A: While it is possible to replace a single failed injector, it is highly recommended to replace all six injectors as a matched set. Injectors wear at similar rates, and a mismatched set can lead to uneven cylinder balancing, continued rough running, and reduced overall engine efficiency.
Contact COGENG
📞 Phone: +86-185-2913-1515
📧 Email: hugo@cogeng.net
💬 WhatsApp +86-185-2913-1515
💬 WeChat: +86-185-7865-1106
🌐 Website: cogeng.net
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