6-Pack Fuel Injection Nozzles for John Deere 3029/4045/6068 PowerTech – RE44508 / RE48786
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Applications are grouped below. Equipment can vary by serial number, engine, and production configuration.
| John Deere Engines | Selected 3029, 4045 and 6068 applications using RE44508 / RE48786 nozzle family |
| Equipment | Agricultural and industrial John Deere equipment using the matching six-nozzle configuration; verify engine arrangement |
Product Overview
A worn or damaged injector can contribute to hard starting, uneven combustion, smoke, loss of power, fuel knock, or a dead cylinder. Injector condition should be considered alongside compression, fuel pressure, pump timing, and the rest of the fuel system.
John Deere lists RE48786 as a substitute/replacement associated with RE44508. Service references identify 29279-marked nozzle applications in several 3029T, 4045T and 6068T PowerTech configurations, making the nozzle number more precise than a broad engine-displacement match.
Key Features & Performance
- Metered fuel delivery: Designed for the matching diesel injection system and engine family.
- Cylinder-level service: Allows the failed injector or injector set to be replaced when testing identifies a fueling problem.
- Reference-number matching: Injector families can look similar, so the stamped/OE number and engine arrangement are important fitment checks.
Part Numbers & Specifications
- Part Numbers: RE44508; RE48786
- Nozzle Marking / Reference: 29279
- Quantity: 6 injectors / nozzles
Before You Order
Confirm RE44508, RE48786 or the matching nozzle marking in the engine parts catalog. Engine families use different injectors across naturally aspirated, turbocharged and emissions configurations.
Frequently Asked Questions
Is this an OEM part?
This is a replacement service part intended to interchange with the reference number(s) and applications listed here. It is not represented as a factory-branded OEM part unless the product packaging itself states otherwise.
How do I confirm fitment?
Match the original part number first, then confirm the machine model, engine, connector or mounting arrangement, and any serial-number break that applies to your equipment.