BLLA 137 P 2346

BOSCH INJECTOR NOZZLE: DLLA137P2346 – FULL SPECIFICATION

I. Key Identification & Compatible Injectors

Nozzle (Injector Tip) P/N: DLLA137P2346
BOSCH MEC / Catalog Number: 0 433 172 346
System Manufacturer: BOSCH Common Rail Diesel Injection System.

Compatible Injector Assembly P/N(s):
- BOSCH Injector References: 0 445 120 346 / 0 986 435 662
- OEM / Vehicle Manufacturer: CASE IH, IVECO, NEW HOLLAND
- Typical Applications (with HP / kW):
• CASE IH / NEW HOLLAND 4.5 L F4AFE611 – 125 HP / 92 kW
• CASE IH / NEW HOLLAND 6.7 L F4AFE411 – 180 HP / 132 kW
• IVECO 4.5 L & 6.7 L (OEM: 5801496001)

II. Vehicle / Engine Application & Technical Data

Primary Vehicle Application: CASE IH, IVECO, and NEW HOLLAND agricultural and commercial diesel engines.
Engine Type: Inline-4 / Inline-6, 4.5 L / 6.7 L Diesel, Euro 4 / Euro 5 compliant
Injector Technology: BOSCH Common Rail Solenoid Injector.
Nozzle Type: DLLA137P2346 — precision multi-hole nozzle for high-pressure injection in heavy-duty diesel engines.
Technical Characteristics:
- Material: Heat-treated, high-strength tool steel
- Number of Holes: 6 (engine variant dependent)
- Hole Diameter: ~0.137 mm
- Spray Angle: 137°
- Operating Pressure: 1600–1800 bar
- Fuel Compatibility: EN 590 Diesel / B7 Biodiesel blends
- Performance Features: Optimized for smooth combustion, low emissions, fuel efficiency, and long injector life

III. Critical Technician Notes (MUST-DO)

1. Clean Installation: Thoroughly clean the nozzle (ultrasonic cleaning recommended) before fitting.
2. Sealing Components: Replace all O-rings, copper washers, and seals; never reuse old parts.
3. Injector Mounting: Follow OEM torque and alignment specifications.
4. Post-Installation Testing: Perform leak-back or test-bench spray tests to verify correct spray pattern and ensure no leaks.
5. Calibration / Coding: Use CASE IH, IVECO, or BOSCH diagnostic tools if injector coding is required.
6. Fuel Quality Notes: Use clean, high-quality diesel; replace fuel filters during service.
7. Storage & Handling: Store nozzles in a dry, dust-free environment; protect the tip from mechanical damage.
8. Common Fault Symptoms: Hard start, rough idle, black smoke, reduced power, excessive fuel return flow.