Product Overview

This high-performance Caterpillar C9 HEUI Fuel Injector (Part Numbers 557-7637 / 557-7633) is a direct replacement component designed for demanding industrial applications. Manufactured to meet strict OEM standards, this injector ensures optimal fuel atomization and combustion efficiency for Caterpillar C9 engines commonly found in heavy excavators. We ship globally to North America, Europe, Asia-Pacific, the Middle East, and Africa, ensuring fast delivery to major ports and industrial centers worldwide.

Key Features & Benefits

• OEM Specification: Manufactured as a direct replacement for OE numbers 557-7637 and 557-7633, ensuring a perfect fit without modifications.
• Enhanced Durability: Constructed from high-grade steel to withstand extreme pressures and temperatures within the HEUI (Hydraulic Electronic Unit Injector) system.
• Improved Fuel Efficiency: Precision engineering delivers consistent fuel metering, reducing consumption and lowering operating costs.
• Reduced Emissions: Optimized spray pattern ensures complete combustion, meeting stringent emission standards.
• Rigorous Testing: Every injector undergoes pressure and flow testing to guarantee performance and reliability out of the box.

Technical Specifications

OEM Cross-Reference

• OEM Number 1: 557-7637
• OEM Number 2: 557-7633
• Application Note: These numbers are interchangeable. Please verify your current injector part number before ordering.

Compatibility

• Primary Engine: Caterpillar C9
• Primary Application: Caterpillar Excavators (e.g., 320D, 322D, 323D series with C9 engine)
• Other Applications: Suitable for other heavy machinery and industrial equipment utilizing the C9 HEUI fuel system.
• Note: Always confirm your engine serial number and injector code for precise compatibility.

Global Supply & Distribution

We serve a global B2B clientele with efficient logistics solutions. Our export experience covers:

• North America: Fast shipping to USA, Canada, and Mexico via UPS/FedEx.
• Europe: Reliable delivery to Germany, UK, France, Netherlands, and beyond via DHL.
• Asia-Pacific: Express shipping to Australia, Japan, Singapore, and Southeast Asia.
• Middle East & Africa: Efficient service to UAE, Saudi Arabia, South Africa, and Nigeria.
• Shipping Partners: DHL, UPS, FedEx, EMS, TNT.
• Lead Time: 3-7 working days after order confirmation.

Quality Assurance

• Manufacturing Standard: Produced in ISO-certified facilities in Shandong, China, using precision machining.
• Testing: Each unit is 100% tested for fuel pressure, flow rate, and spray pattern before packaging.
• Warranty: Backed by a 4-month warranty against manufacturing defects. We stand by the quality of our parts.
• Packaging: Securely packed to prevent damage during international transit.

FAQ

Q: Will this injector fit my Caterpillar 320D excavator with a C9 engine?
A: Yes, the 557-7637 and 557-7633 injectors are standard components for the Caterpillar C9 engine, which powers many 320D and similar series excavators. Please verify your engine serial number to confirm.

Q: What is the difference between part numbers 557-7637 and 557-7633?
A: These are often interchangeable OEM numbers. The 557-7637 is the primary number, while 557-7633 may be a superseded or alternative reference. Both fit the same application. We recommend checking your current injector’s physical number.

Q: Do these injectors require special programming or calibration before installation?
A: HEUI injectors are typically pre-calibrated. However, for optimal performance, we recommend having them installed by a qualified technician who can check the injector codes and program them into the engine’s ECU using CAT ET software.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .