CUMMINS K19 Injector 4307331 – High Pressure Fuel Injection
Executive Overview: The K19 Injector (Part No. 4307331) is a critical fuel system component engineered specifically for the heavy-duty CUMMINS K19 engine series. Designed to maintain optimum combustion efficiency, this injector helps prevent power loss and excessive fuel consumption in harsh operational environments.
Why Choose Our CUMMINS K19 Injector 4307331?
For high-displacement industrial diesel engines, precise fuel metering is essential. Our K19 Injector guarantees steady performance through strict quality control and advanced atomization technology:
- Precision Fuel Atomization: Delivers high-pressure diesel spray directly into the combustion chamber to ensure complete fuel burn and lower emissions.
- Heavy-Duty Construction: Manufactured with heat-treated alloy steel to resist extreme pressure and thermal fatigue during long-hour operations.
- Strict Quality Inspection: Every CUMMINS K19 fuel injector is 100% flow-tested and pressure-tested prior to factory shipment.
Technical Specifications & Cross-Reference
| Specification | Details |
| Product Name | Fuel Injector Assembly |
| OEM Part Number | 4307331 |
| Focus Engine Model | CUMMINS K19 / KT19 / KTA19 |
| Fuel Type | High-Pressure Diesel Injection |
| Condition | 100% Brand New (OEM Standard) |
| Warranty | 3 Months |
Frequently Asked Questions (Technical FAQ)
Q: What engine models are compatible with the K19 Injector 4307331?
A: This injector is primarily designed for the CUMMINS K19 series (including KTA19-M and KTA19-G models) commonly used in marine vessels, mining trucks, and backup generators.
Q: How do I know if my CUMMINS K19 fuel injector needs replacement?
A: Common symptoms of a failing K19 Injector include engine misfires, rough idling, increased black smoke emissions, and unexpected drops in fuel economy.
Contact Us for Bulk & Export Pricing
We offer worldwide shipping and competitive wholesale pricing on genuine and OEM-quality CUMMINS K19 engine parts. Contact our technical sales team today with your Engine Serial Number (ESN) for quick order processing!
| art | Ref No | Part Number | Part Description | Required | Remarks |
| PP43849 | Injector | ||||
| 4307331 | 6 | ||||
| 1 | 167157 | Check Ball | 1 | ||
| 2 | 173086 | Injector Gasket | 1 | ||
| 3 | 174299 | Screen Retainer | 1 | ||
| 4 | 3042430 | Injector Cup Retainer | 1 | ||
| 5 | 193736 | O-Ring Seal | 3 | Orange | |
| 6 | 203426 | Roll Pin | 2 | ||
| 7 | 3054999 | Filter Screen | 1 | ||
| 8 | 3042428 | Injector Spring | 1 | ||
| 9 | 4307427 | Injector Adapter | 1 | ||
| 10 | 3042427 | Injector Spring | 1 | ||
| 11 | 3411695 | Injector Clamp | 1 | ||
| 12 | 3045047 | Injector Orifice Plug | 1 | ||
| 13 | 3052218 | Injector Spring Retainer | 1 | ||
| 14 | 3052231 | Injector Link Retainer | 1 | ||
| 15 | 3052233 | Injector Plunger Link | 1 | ||
| 16 | 3279821 | Injector Stop Screw | 1 | ||
| 17 | 3279850 | Tappet Top Stop Lock Nut | 1 | ||
| 18 | 3279819 | Injector Plunger Link | 1 | ||
| 3076126 | Barrel And Plunger | 1 | |||
| 19 | 3076124 | Injector Plunger | 1 | ||
| 20 | 3053504 | Injector Barrel | 1 | ||
| 21 | 3068859 | Tappet Top Stop Cap | 1 | ||
| 22 | 3068860 | Lock Nut | 1 | 1 5/16 – 18 UNF. | |
| 23 | 3609841 | Injector Cup | 1 | ||
| 3075381 | 1 | ||||
| 24 | 3027988 | Retaining Ring | 1 | ||
| 25 | 3027994 | Compression Spring | 1 | ||
| 26 | 3027996 | Check Ball | 1 | ||
| 27 | 3076033 | Ball Guide | 1 | ||
| 28 | 3054852 | Injector Spring | 1 | ||
| 29 | 4077027 | Injector Spring | 1 | ||
| 30 | 3085344 | Ball Guide | 1 | ||
| 31 | 3085345 | Tappet Socket | 1 | ||
| 3075391 | Sleeve And Plunger | 1 | |||
| 32 | 3053772 | Tappet Plunger | 1 | ||
| 33 | 3075386 | Tappet Sleeve | 1 |
