The DLLA142S334N547 Diesel Injector Nozzle is a precision nozzle for mechanical diesel fuel injection systems, identified by Denso/Zexel reference 105015-5470. It is specifically listed for Komatsu 6D105 diesel engines and compatible nozzle-holder assembly 105101-7540 / Komatsu 6136-12-3400.
Designed for accurate fuel metering and spray formation, this nozzle is suitable for injector replacement, overhaul, calibration, and fuel-system maintenance on compatible Komatsu equipment.
Key Features
Nozzle Model: DLLA142S334N547
Denso/Zexel Reference: 105015-5470
Nozzle Holder Assembly: 105101-7540
Komatsu Reference: 6136-12-3400
Engine Application: Komatsu 6D105
Fuel System: Mechanical Diesel Injection
Nozzle Type: S-Type multi-hole nozzle
Application: Injector repair, replacement and calibration
Application & Compatibility
The 105015-5470 / DLLA142S334N547 nozzle is listed in Komatsu calibration data for the 6D105 engine, paired with the KBL2.1-S nozzle holder. The published calibration data specifies a first nozzle opening pressure of 17.7 MPa (180 kgf/cm²) and a second-stage opening pressure of approximately 30.3–31.0 MPa.
This makes the nozzle particularly relevant to Komatsu construction and industrial diesel equipment using the 6D105 injection system. Before ordering, match the nozzle number and complete injector/nozzle-holder assembly rather than relying only on the engine model.
Replacement & Service
A worn or contaminated nozzle can affect fuel atomization, injection timing response, combustion quality, starting performance, smoke levels, and engine power. Replacing DLLA142S334N547 during injector servicing can help restore the intended fuel spray characteristics.
After installation, the injector should be cleaned, assembled, pressure-tested and calibrated using the specifications for the complete injector assembly. The published Komatsu data also indicates that this nozzle is part of a calibrated nozzle-holder assembly, so correct pressure adjustment is important.
Compatibility Note: Always verify 105015-5470, DLLA142S334N547, the nozzle-holder number, engine model, and original injector specification before purchase. Similar DLLA142S-series nozzles are not necessarily interchangeable.
For wholesale orders or compatibility confirmation, contact Pioneer Diesel Parts with the original nozzle or injector number and engine details.
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