Product Overview

This premium C9 diesel fuel injector is a direct-fit replacement engineered for Caterpillar 330D, 336D, E330D, and E336D excavators. Manufactured to stringent tolerances, it delivers precise fuel atomization for optimal combustion efficiency, stable idle quality, and consistent power output under heavy-duty earthmoving conditions. Supplied from our established export warehouse with worldwide shipping, this injector serves major markets across North America, Europe, the Asia-Pacific, the Middle East, South America, and Africa, reaching major ports and industrial distribution hubs with reliable lead times.

Key Features & Benefits

• Precision Fuel Atomization: Calibrated nozzle and internal tolerances ensure an even spray pattern for complete combustion, smoother engine response, and reduced exhaust smoke.
• Durable Construction: High-grade alloy body and hardened internal components resist corrosion, cavitation, and the extreme cylinder pressures found in C9 excavator applications.
• Exact Fitment: Designed as a direct replacement for OEM injector numbers 387-9433, 387-9432, 387-9434, and 387-9430, allowing straightforward installation without adapter or harness modification.
• Improved Fuel Economy: Correct injection timing and flow rate help restore factory fuel consumption levels and reduce operating cost per hour.
• Stable Performance: Each unit is flow-tested and bench-verified to support consistent rail pressure response and reliable cold-start behavior.
• Export-Ready Packaging: Individually protected and boxed to withstand international freight handling, with neutral or branded packaging available on request.

Technical Specifications

OEM Cross-Reference

This injector is cross-referenced against the following original equipment numbers. Please confirm your existing injector marking or engine serial number before ordering.

• 387-9433 — primary reference number
• 387-9432 — interchangeable reference
• 387-9434 — interchangeable reference
• 387-9430 — interchangeable reference

These numbers may appear as supersessions or regional variants of the same injector assembly. If your unit carries a different number, send us the marking and engine serial number for verification.

Compatibility

• Engine: Caterpillar C9 ACERT diesel engine
• Excavator Models: 330D, 330D L, 330D LN, 336D, 336D L, E330D, E336D
• Typical Application Range: Mid-2000s to early-2010s machine production; always verify by engine serial number
• Related Equipment: May also suit other C9-powered Caterpillar machines — confirm before purchase

Fitment Note: Injector part numbers vary by engine arrangement and emissions configuration. Cross-reference the number stamped on your original injector and your machine serial number to guarantee a correct match.

Global Supply & Distribution

• Worldwide Shipping: Express courier (DHL, FedEx, UPS), air freight, and sea freight to fit any order size or schedule.
• Major Markets Served: North America, Europe, Asia-Pacific, the Middle East, South America, Africa, and Oceania.
• Fast Delivery to Key Hubs: Consolidated shipping to major ports and industrial centers including Los Angeles, Rotterdam, Jebel Ali, Singapore, Sydney, and Santos.
• Export Experience: Established international trade documentation, HS code classification, and commercial invoicing for smooth customs clearance.
• Flexible Ordering: Sample and trial orders welcome, with volume pricing for distributors, repair workshops, and fleet operators.

Quality Assurance

• Manufacturing Standards: Produced under ISO 9001-aligned quality management with in-process inspection at each assembly stage.
• Testing Procedures: Each injector undergoes flow-rate and spray-pattern bench testing to verify delivery volume, atomization quality, and leak integrity.
• Material Control: Traceable alloy steel bodies and hardened nozzle components selected for high-temperature and high-pressure diesel service.
• Warranty: 6-month limited warranty against manufacturing defects from date of delivery.
• Pre-Shipment Inspection: Visual and functional check before packing, with photos available on request.

FAQ

Q1: How do I confirm this injector fits my excavator?
A: Check the part number stamped on your original injector and compare it with 387-9433, 387-9432, 387-9434, or 387-9430. Also confirm your engine is a Caterpillar C9 and your machine is a 330D, 336D, E330D, or E336D. If the numbers differ, send us a photo of the injector marking and your engine serial number and we will verify compatibility before you order.

Q2: What should I check during installation?
A: Replace the injector seal and copper washer, clean the injector bore and seat thoroughly, and torque the retaining clamp to the manufacturer’s specification. Use new high-pressure fuel lines where required, prime the fuel system to remove air, and avoid reusing contaminated diesel. Incorrect seating or debris in the bore is the most common cause of post-installation leaks and rough running.

Q3: What maintenance practices extend injector life?
A: Use clean, water-free diesel and replace fuel filters at the recommended interval, since contaminated fuel is the leading cause of injector wear. Periodically check for injector return-flow imbalance and address hard starting, excessive smoke, or misfire symptoms early. Storing spare injectors in a dry, sealed package away from moisture and dust also protects internal components before installation.