Bosch DLLA142P1709 (Bosch nozzle number 0 433 172 047) is a hole‑type common rail injector nozzle used in Bosch injector assembly 0 445 120 121 (cross‑references: 0986AD1047, 4940640) for Cummins ISLe 8.9L Euro III diesel engines, commonly found in Yutong and King Long buses, as well as Dongfeng heavy‑duty trucks.
Main Specifications:
- Hole diameter: 0.142 mm
- Flow code: 1709 (reference test value)
- System injection pressure: 1,600–2,000 bar (CRI system)
- Nozzle type: Multi‑hole laser drilled
- Compatible injector: 0 445 120 121
- Solenoid valve: F 00R J02 697
- Solenoid valve (alternative): F 00R J01 941
- Engine application: Cummins ISLe‑EU3 8.9L
- Cross references: 0986AD1047 (Bosch aftermarket), 4940640 (Cummins)
Table of Contents
- Technical Specifications
- Compatible Injector Assemblies
- Compatible Solenoid Valves and Repair Kits
- Vehicle and Engine Applications
- Common Failure Symptoms and Maintenance
- FAQ
- Looking for DLLA142P1709 Nozzles?
- Related Articles
- Conclusion
The Bosch DLLA142P1709 is a hole‑type common rail injector nozzle designed for high‑pressure diesel injection systems in heavy‑duty commercial vehicles. Manufactured by Bosch, a global leader in diesel fuel injection technology, this nozzle is a critical component of the Bosch common rail system, responsible for atomizing diesel fuel into fine droplets that mix efficiently with combustion air, enabling complete combustion and optimal engine performance.
The DLLA142P1709 nozzle belongs to the Bosch CRIN (Common Rail Injector) family and operates within the Bosch CRI injection system at pressures of 1,600 to 2,000 bar, providing the precise fuel metering required for Euro III emissions compliance while maintaining the torque and durability demanded by heavy‑duty commercial applications.
1. Technical Specifications
1.1 Identification Codes
The Bosch DLLA142P1709 injector nozzle is identified by multiple cross‑reference part numbers. These codes are essential for accurate parts lookup and compatibility verification:
| Reference Type | Code |
|---|---|
| Nozzle Stamping | DLLA142P1709 |
| Bosch Nozzle Number | 0 433 172 047 |
| Injector Assembly Number | 0 445 120 121 |
| Bosch Aftermarket Code | 0986AD1047 |
| Cummins Reference | 4940640 |
These reference numbers are verified across multiple supplier catalogs and industry databases. The nozzle number 0 433 172 047 corresponds to the stamping DLLA142P1709, while the injector assembly number 0 445 120 121 identifies the complete injector unit in which this nozzle is installed. The cross‑reference 0986AD1047 is Bosch’s aftermarket part number for the complete injector assembly, and 4940640 is the corresponding Cummins OEM reference number.
1.2 Physical Specifications
| Parameter | Value |
|---|---|
| Component Type | Hole-type common rail nozzle |
| Weight | ~0.05 kg (50 g) |
| Material | Special high-speed steel |
| Stroke | 4-stroke |
| Fuel Compatibility | Diesel |
The nozzle is manufactured from high‑speed steel, typically processed with vacuum hardening to achieve a rigidity of HRC 62–65. This hardness ensures wear resistance and dimensional stability under the extreme cyclic loads of common rail operation. The complete injector assembly 0 445 120 121 weighs approximately 0.85 kg.
1.3 Hydraulic and Performance Specifications
| Parameter | Typical Value |
|---|---|
| Nozzle Hole Diameter | 0.142 mm |
| Flow Code | 1709 (reference test value) |
| System Injection Pressure | 1,600–2,000 bar (CRI system) |
| Nozzle Type | Multi-hole laser‑drilled |
The 142 in the designation indicates the nozzle hole diameter (0.142 mm), while 1709 represents the flow code. In Bosch common rail nozzles, the flow code typically corresponds to the calibrated flow rate measured under standard test conditions.
The DLLA142P1709 operates within Bosch CRI (Common Rail Injector) systems capable of injection pressures of 1,600–2,000 bar. The multi‑hole laser‑drilled design produces fine atomization essential for meeting Euro III/IV emissions standards while maintaining fuel economy.
1.4 Material and Quality Standards
DLLA142P1709 nozzles, whether genuine Bosch or manufactured by ISO‑certified aftermarket producers, must meet rigorous quality standards:
- Vacuum hardening for consistent hardness across the component
- ISO9001 quality management system certification
- 100% testing before shipment for flow rate and spray pattern
- Material composition: Special high‑speed steel variants
- Certifications: CE, ISO9001
2. Compatible Injector Assemblies
2.1 Primary Injector Fitment
The DLLA142P1709 nozzle is installed in Bosch injector assembly 0 445 120 121. This injector is part of the Bosch CRI (Common Rail Injector) family, used extensively in heavy‑duty diesel engines.
| Component | Part Number |
|---|---|
| Injector Assembly | 0 445 120 121 |
| Bosch Aftermarket | 0986AD1047 |
| Cummins OEM | 4940640 |
| Nozzle | DLLA142P1709 (0 433 172 047) |
Cross‑reference verification:
- Bosch aftermarket catalogs confirm that injector assembly 0 445 120 121 corresponds to Bosch aftermarket reference 0986AD1047 and Cummins reference 4940640.
- Diesel injection supplier databases consistently identify DLLA142P1709 (0 433 172 047) as the original nozzle installed in injector 0 445 120 121.
- Industry parts catalogs and common rail component databases show the compatibility relationship between injector 0445120121, nozzle 0433172047 (DLLA142P1709), and solenoid valve F00RJ02697.
2.2 Injector Generation Classification
The injector assembly 0 445 120 121 belongs to the CRIN1.6 generation of Bosch common rail injectors. Bosch CRIN injectors in the Chinese market are classified into four generations: CRIN1 (e.g., 0 445 120 002), CRIN1.6 (e.g., 0 445 120 121), CRIN2 (e.g., 0 445 120 078), and CRIN3 (e.g., 0 445 120 157).
3. Compatible Solenoid Valves and Repair Kits
3.1 Solenoid Valves
The DLLA142P1709 nozzle works with the following solenoid valve assemblies:
| Solenoid Valve | Compatibility |
|---|---|
| F 00R J02 697 | Primary solenoid valve for injector 0 445 120 121 |
| F 00R J01 941 | Alternative valve used in some repair configurations |
The solenoid valve F 00R J02 697 is shared across multiple injector assemblies within the Bosch CRIN product line, making component‑level servicing possible. As documented in industry catalogs, F00RJ02697 maps to injector 0445120121 and nozzle 0433172047. Multiple supplier listings confirm that injector 0 445 120 121 uses solenoid valve F 00R J01 941 as a compatible component.
3.2 OEM Repair Kits
A complete OEM‑grade repair kit for this injector includes the following components:
| Repair Kit Reference | Included Components |
|---|---|
| F 00R J03 482 | Control valve set for injector 0 445 120 121 |
| F 00R J03 482 (alternative) | F00VC99002 + F00RJ01941 + DLLA142P1709 |
The repair kit allows service shops to rebuild rather than replace complete injectors, reducing maintenance costs while restoring original performance. The original injector overhaul kit (F00RJ03482) contains the control valve (F00VC99002), solenoid valve (F00RJ01941), and nozzle (DLLA142P1709) for injector 0445120121.
4. Vehicle and Engine Applications
4.1 Primary Engine Application
The DLLA142P1709 nozzle is primarily used in the Cummins ISLe 8.9L Euro III diesel engine.
The Cummins ISLe is an 8.9‑liter inline six‑cylinder diesel engine with the following specifications:
- Bore & stroke: 114 × 145 mm
- Displacement: 8.9 liters (541 cu in)
- Power range: 290–380 HP (213–280 kW)
These engines employ Bosch CRI common rail systems with operating pressures typically ranging from approximately 1,600 to 2,000 bar, depending on engine calibration and service specifications.
4.2 Vehicle Applications
| Vehicle Type | Specific Applications |
|---|---|
| Buses | Yutong city & intercity buses |
| Buses | King Long coaches |
| Trucks | Dongfeng Tianlong / Kinland trucks |
| Trucks | Foton Auman |
Industry supplier catalogs and aftermarket application databases indicate that injector 0 445 120 121 is commonly matched with Cummins ISLe-EU3 engines used in Yutong and King Long bus applications.
5. Common Failure Symptoms and Maintenance
5.1 Common Failure Patterns
When the DLLA142P1709 nozzle begins to fail or degrade, the following symptoms may appear:
Symptom 1: Engine misfire on specific cylinders
- Indicated by OBD fault codes beginning with P02xx (e.g., P0201 for cylinder 1 injector circuit malfunction)
- May also trigger P0300 series (random/multiple cylinder misfire detection)
Symptom 2: Rough idle and white smoke
- Indicates needle valve or nozzle tip damage
- Commonly caused by water contamination or abrasive particles in fuel
Symptom 3: Increased fuel consumption and black smoke
- Indicates nozzle hole erosion or flow calibration drift (“hole growth”)
Symptom 4: Return fuel flow exceeding specification
- Static return flow above 60 ml/min (industry reference) indicates internal wear
Symptom 5: Injection quantity deviation
- Excessive wear or calibration drift may result in increased fuel delivery, black smoke, and higher fuel consumption.
5.2 Root Causes of Nozzle Failure
- Fuel contamination: Impurities including water, lead, aluminum powder, iron powder, and sulfides exceeding standard requirements
- Normal wear: Prolonged high‑temperature operation causing gradual degradation
- Needle wear: Leads to oil hole blockage, insufficient fuel injection
- Spring rusting/fracture: Results in black smoke emissions
- Nozzle cap damage: Deformation, cracking, thread damage, or leakage leads to injector damage
5.3 Nozzle Inspection Procedure
A professional injector test stand (e.g., Bosch EPS 200, EPS 205, or DCI 700) is required for accurate diagnosis. The test should verify:
- Spray pattern quality
- Reference bench-test pressure characteristics
- Static return flow at full load point
- Dynamic flow quantity across engine operating range
- Seat seal integrity
5.4 Replacement Guidelines
- Always replace nozzles in full sets across all cylinders
- Use torque wrenches calibrated to manufacturer specifications (60–80 N·m for Cummins ISLe hold‑down clamps)
- Clean injector bores thoroughly before installation
- Replace nozzle tight cap after being disassembled more than 5 times
- Perform leak check and rail pressure test after installation
- Reset injector trim codes in the ECU using factory diagnostic software
5.5 Preventive Maintenance
- Use high‑quality fuel filtration meeting OEM specifications
- Replace fuel filters at recommended intervals
- Avoid running the engine on contaminated or degraded fuel
- Inspect injectors during scheduled engine maintenance
6. FAQ
1. What injector uses DLLA142P1709?
The DLLA142P1709 nozzle is installed in Bosch injector assembly 0 445 120 121 (also known as Bosch 0986AD1047 or Cummins 4940640).
2. What engine uses DLLA142P1709?
It is primarily used in Cummins ISLe 8.9L Euro III diesel engines, found in Yutong buses, King Long coaches, and Dongfeng trucks.
3. What is the Bosch nozzle number for DLLA142P1709?
The Bosch nozzle number is 0 433 172 047.
4. What solenoid valves are compatible with DLLA142P1709?
The nozzle works with solenoid valves F 00R J02 697 (primary) and F 00R J01 941 (alternative).
5. What causes DLLA142P1709 nozzle failure?
Common causes: fuel contamination (water, abrasives), normal wear, nozzle hole erosion, excessive return flow, and needle valve wear.
6. What is the injection pressure range for DLLA142P1709?
The nozzle operates at 1,600–2,000 bar in Bosch CRI systems.
Related Bosch Common Rail Nozzles
The DLLA142P1709 belongs to a broader family of Bosch common rail nozzles used in commercial vehicle, industrial, and bus applications.
Related models include:
- DLLA142P1708
- DLLA142P1710
- DLLA142P1654
- DLLA142P1595
- DLLA142P1363
- DLLA142P2451
Although these nozzles share similar dimensions, each model has a different flow calibration and application specification. Always verify the original injector assembly number before selecting a replacement nozzle.
7. Looking for DLLA142P1709 Nozzles?
We supply OEM‑quality replacement components for Bosch common rail systems:
Products available:
- DLLA142P1709 (0 433 172 047) nozzles
- Complete injector assemblies 0 445 120 121 (0986AD1047 / 4940640)
- Solenoid valves: F 00R J02 697, F 00R J01 941
- Repair kits: F 00R J03 482
- Control valve sets
Quality features:
- ISO9001 certified manufacturing
- 100% flow‑tested before shipment
- OEM specifications and tolerances
- Multi‑hole laser‑drilled nozzles
Service features:
- Competitive wholesale pricing
- Worldwide shipping available
- Technical support for installation and diagnosis
- Bulk order discounts
For technical support, quotations, or wholesale inquiries, please contact our diesel injection specialists with your OEM part number for verification and fast quoting.
8. Related Articles
Read more from this series:
- DLLA118P2203 — Technical Specifications, Parameters, and Applications
- DLLA148P1726 — Nozzle Compatibility and Engine Fitment Guide
- DSLA143P970 — Hole‑Type Nozzle for Heavy‑Duty Diesel Injection
9. Conclusion
The Bosch DLLA142P1709 is a precision‑engineered common rail nozzle that has proven its reliability in millions of Cummins ISLe‑powered trucks and buses worldwide. Its 0.142 mm hole diameter and 1709 flow calibration provide the fuel delivery characteristics required for the 8.9‑liter engine platform to meet Euro III emissions standards while delivering the torque and durability demanded by heavy‑duty commercial applications.
For service technicians, maintaining quality replacement standards when servicing this nozzle—including proper torque procedures, full‑set replacement across all cylinders, and trim code reset—is essential to maintaining engine reliability and performance.
Disclaimer
Bosch and Cummins part numbers are used for compatibility and identification purposes only. All products described in this article are aftermarket replacement parts and are not claimed to be original Bosch or Cummins products unless explicitly stated.
