Skip to product information
SKU:
NLT2T03635
Ships for free in 2–4 business days.
4-Pack RE36939 Fuel Injection Nozzles for John Deere 4039 / 4045 Diesel Engines
$230.59
In Stock
$230.59
Sale price
$230.59
Regular price
This listing contains four RE36939 fuel injection nozzles for compatible John Deere mechanical-diesel applications, especially 4039 and 4045 engine families.
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
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.
Compatible equipment / model
| Brand / Family | Compatible Applications |
|---|---|
| John Deere engines | 4039D/TF and 4045D/TF applications; RE36939 also appears in other Deere engine families |
| John Deere equipment | 5400, 5500, 6200, 6300, 6400 and many additional machines using the matching nozzle |
Product Overview
RE36939 controls fuel atomization into the combustion chamber. Worn or sticking nozzles can contribute to hard starting, haze/smoke, uneven idle, diesel knock or poor power when compression and injection-pump timing are otherwise correct.
John Deere also catalogs RE36939 on 3-cylinder 3029 and 6-cylinder 6059/6068 applications; this listing is a four-piece set, so order quantity must match the engine being serviced.
Key Features & Performance
- Controls diesel fuel atomization: The nozzle meters and sprays fuel into the combustion chamber in the pattern required by the matching engine.
- Symptoms can overlap: Smoke, hard starting and rough running can also come from compression, pump timing or fuel-quality problems, so diagnosis matters.
- Part-number based service: Engine build code and nozzle reference should be checked before replacing one or a full set.
- Product-specific note: John Deere also catalogs RE36939 on 3-cylinder 3029 and 6-cylinder 6059/6068 applications; this listing is a four-piece set, so order quantity must match the engine being serviced.
Technical Specifications
- Quantity: 4 fuel injection nozzles
- Fuel system: Mechanical diesel injection nozzle
Replaces / Reference Part Numbers
RE36939
Common Replacement Reasons
- Poor spray pattern or failed nozzle test
- Hard starting, smoke or rough running traced to injector/nozzle condition
- Engine service where matched nozzle condition is being restored across cylinders
Frequently Asked Questions
How do I confirm this is the correct part?
Confirm RE36939 by engine serial/build code. The four-piece quantity does not mean every compatible engine uses four cylinders.
Is this an OEM part?
Unless the listing is explicitly identified as genuine/OEM in the product data, treat it as a replacement component. Use the verified reference numbers, equipment application and physical configuration above to match your original part.
What should I check before installation?
Professional nozzle testing/pop-pressure verification is recommended when servicing a full injector set.
Fitment note: Equipment manufacturers may use different components within the same model family based on engine, serial number or production date. Confirm the original part number and machine/engine details before ordering.