387-9437 10R-4844 Fuel Injector for CAT C9 330D 336D 340D 340D2

387-9437 CAT Fuel Injector 10R-4844 for C9 330D 336D 340D 340D2

387-9437 CAT Fuel Injector 10R-4844 is designed for Caterpillar C9 engine and 330D, 336D, 340D, and 340D2 equipment applications. It is suitable for diesel fuel system repair, replacement, and maintenance use when the original injector number matches 387-9437, 3879437, 10R-4844, or 10R4844.

Product Specifications

• Product Type: Diesel Fuel Injector Assembly
• Main Part Number: 387-9437
• Reference Number: 10R-4844
• Other Reference: 3879437 / 10R4844
• Application: Caterpillar C9 / 330D / 336D / 340D / 340D2
• Fuel Type: Diesel
• Package Includes: 1 × Fuel Injector Assembly

387-9437 CAT Fuel Injector Cross Reference

• 387-9437
• 3879437
• 10R-4844
• 10R4844

Compatible Application

• Caterpillar C9 diesel engine applications
• Caterpillar 330D excavator applications
• Caterpillar 336D excavator applications
• Caterpillar 340D and 340D2 equipment applications

Key Features

• Direct replacement for matched injector part numbers
• Designed for stable fuel delivery and diesel engine performance
• Checked before shipping
• Secure packing for international delivery
• Suitable for repair shops, service centers, and diesel parts distributors

Important Notice

Please confirm your original injector part number, engine model, and injector appearance before ordering. Matching by part number is the most reliable way to confirm compatibility. Professional installation is recommended.

Browse more
diesel injection parts
or
request a quote
if you need help confirming fitment.

For general Caterpillar equipment information, please refer to the
Caterpillar official website.

387-9437 CAT Fuel Injector identification and compatibility

The 387-9437 CAT Fuel Injector should be selected by part number and verified against the component removed
from the engine. Vehicle model names alone are not sufficient because the same model can use
different fuel-system versions in different markets or production periods. Compare the number
on the old component, connector layout, mounting points, fuel connections and the visible body
shape. Please confirm OE number, engine model or old part photos before ordering.

Practical checks before replacing this diesel fuel injector

Hard starting, unstable idle, smoke, loss of power or unusual fuel consumption can have more
than one cause. A workshop should check fuel quality, supply pressure, return flow, wiring,
compression and related control components before deciding that replacement is required.
Diagnostic results should be considered together with the engine code and the number on the old
part. This avoids ordering by appearance only and helps distinguish a component fault from a
fuel-supply or electrical problem.

Installation and commissioning

Installation should be completed by a qualified diesel technician using clean tools and the
correct workshop procedure. Protect open fuel connections from contamination, replace required
seals, and follow the vehicle or engine manufacturer’s tightening and cleanliness instructions.
Some applications may require calibration data, coding, adaptation or relearn procedures, while
others do not. The applicable service information and diagnostic equipment should determine the
correct process for the specific engine.

Information to send for fitment confirmation

For an efficient compatibility check, send a clear photo of the complete old part and close-up
photos of every readable number. Include the vehicle or machine model, engine model, year and
destination market when available. If several numbers appear on the component, provide all of
them rather than relying on one shortened reference. These details help Rayfuel compare the
requested item with the available aftermarket replacement.

Rayfuel supply and product support

The 387-9437 CAT Fuel Injector is supplied as an aftermarket replacement for professional diesel repair and parts
sourcing. Repair shops, distributors and wholesale buyers can review related products in the
common rail injector category. For quantity requirements or uncertain fitment, use the
Rayfuel contact page and include the OE number,
engine information and old-part photos. Packaging and shipping options can be discussed according
to the order quantity and destination.