I. Nozzle Identification & Compatible Injectors

Injector Nozzle Tip P/N:
0 433 271 322

Trade Designation:
BLLA 28 S 656

Injection System Manufacturer:
BOSCH – Conventional Mechanical Injection System

Compatible Nozzle Holder Assemblies (P/N)

• 0 432 191 863

• 0 432 191 792

• 0 432 191 772

OEM Cross-References

• IVECO: 9946410 / 2145081 / 42031751

• KHD (DEUTZ): 0241 9608 / 0415 3110

• BOMAG: 057 144 02

• INTERNATIONAL HARVESTER / CASE: B 943 277

• POCLAIN: 12102-12

II. Vehicle Applications & Technical Data

Primary Applications

• Heavy-duty trucks

• Agricultural machinery

• Construction equipment

Key Equipment Manufacturers

• IVECO (EuroCargo / EuroTech)

• Magirus-Deutz

• Poclain (Excavators)

Engine Applications

• IVECO: 8060.45 Series

• KHD / Deutz: F-Series / BF6L 913

Nozzle Type

• S-Type Sac-Hole Nozzle (DLLA)

Spray Characteristics

• Number of spray holes: 2

• Hole diameter: 0.45 mm

• Spray angle: 28°

Material

• Heat- and wear-resistant chrome–nickel steel alloy

III. Critical Technician Notes (MANDATORY)

1. Opening Pressure Setting (NPOP)

• These are mechanical injectors, not common rail

• Opening pressure is adjusted using calibration shims inside the nozzle holder

• Typical setting range: 240–250 bar

• Always verify the exact specification in the engine service manual

2. Inspection & Lapping Requirements

• Inspect nozzle needle and seat for:

  • Blue discoloration (overheating)

  • Carbon scoring or wear

• Needle free-movement test:

  • The needle must slide freely under its own weight when tilted at 45°

  • If movement is restricted → replace the nozzle

3. Nozzle Chatter Test

• During hand-pump testing:

  • A serviceable Class 3 nozzle produces a distinct chatter/buzzing sound at higher injection speeds

  • Silent operation or fuel streaming at low pressure indicates:

    • Poor sealing

    • Blocked or damaged spray holes

4. Sealing Washer (Heat Shield)

• Always replace the copper sealing washer

• Failure to replace can cause:

  • Combustion gas leakage

  • Nozzle seizure in the cylinder head

  • Overheating and premature nozzle tip failure