CAT C9 Fuel Injector for Excavator – OEM Diesel Injector, Heavy Duty High Performance

Parameters / Specifications

OEM part numbers are for reference only. Please confirm your engine serial number and original injector number before ordering.

Product Technology

This C9 injector is manufactured with advanced CNC machining, EDM drilling, and precision grinding. The nozzle body and needle are matched in microns for leak-free sealing. The solenoid coil is wound with high-temperature wire and encapsulated for vibration resistance. Every injector is assembled in a clean room and tested for injection quantity, spray pattern, response time, and internal leakage.

Product Applications

• CAT 330C Excavator: C9 engine fuel injector replacement.

• CAT 330D Excavator: C9 ACERT injector for digging and loading.

• CAT 336D Excavator: High-pressure injector for heavy construction.

• CAT 340D / 345C: C9-powered excavators and other equipment.

• Other Applications: C9 engines in generators, loaders, and industrial machinery.

Company Service

• Global Shipping: Fast, insured delivery by sea, air, or express.

• OEM & Custom Orders: Private-label packaging and custom part numbers available.

• 24/7 Technical Support: Installation and troubleshooting help by phone, email, or video.

• Complete Parts Inventory: Injectors, seal kits, and nozzles in stock for immediate dispatch.

• 12-Month Warranty: One-year warranty against manufacturing defects.

• Bulk Discounts: Special pricing for fleets, distributors, and repair shops.

FAQ – CAT C9 Fuel Injector for Excavator

Q1: How do I confirm this injector fits my CAT C9 engine?
Please check your engine serial number and the original injector part number. Common C9 injector numbers include 235-2888, 254-4330, 266-4446, 328-2582, and 387-9427. Send us a photo of your old injector’s label, and our team will confirm compatibility before you order.

Q2: Is this a genuine Cat injector?
This is a high-quality aftermarket replacement built to OEM specifications. It is not a genuine CAT part, but it matches OEM fit and performance at a significantly lower price.

Q3: What are the signs of a bad C9 injector?
Common symptoms include rough idle, misfire, black smoke, power loss, hard starting, increased fuel consumption, and fuel in the oil. If you notice these signs, test the injector or replace it promptly.

Q4: Can I install this injector myself?
Installation requires mechanical skills and proper tools. You must relieve fuel pressure, remove the valve cover, disconnect the oil and fuel lines, and remove the injector. Always use new O-rings and seals. If you are not experienced, have a qualified technician install it.

Q5: Do I need to replace all injectors at once?
If one injector fails, you can replace only that one. However, if the engine has high hours or multiple injectors are worn, replacing them as a set is recommended for balanced performance.

Q6: What causes C9 injector failure?
Contaminated fuel, water in fuel, low oil pressure, overheating, and normal wear can all cause injector failure. Always use clean diesel, change fuel filters on time, and maintain correct engine oil pressure.

Q7: How should I store spare injectors?
Store injectors in a dry, clean place away from moisture and dust. Keep them in their original packaging until installation. Do not remove the protective caps until you are ready to install.