456-3645 4563645 Fuel Injector Nozzle for Cat C9.3 Excavator 336E 336E L 336E LN Hydraulic Excavators

1. Compatible Engine Model

• Cat C9.3 (Acert Diesel Engine Platform)

2. Compatible Equipment Models

Cold Planers (Asphalt/Concrete Milling Machines):

• PM310

• PM312

• PM313

Hydraulic Excavators:

• 336E

• 336E L / 336E LN

• 336F / 336F L

Cross Reference & Trade Terms:

• OEM Manufacturer Part Number: 456-3645 / 4563645

• Cat Reman Part Number: 20R-5076 / 20R5076

• Application System: Common Rail Fuel System (CR350 platform)

Wuhan Jinhong Auto Parts Co., Ltd. is a manufacturer and exporter of common rail fuel injectors integrating manufacturing,processing and R & D.

Our company is Bos-ch common rail injector, Den-so common rail injector, Del-phi injector, CAT injector and other professional production and processing companies, with a complete and scientific quality management system. Our factory has a complete and scientific management system and professional product development team, products have been advancing with The Times, quality is also constantly improving, product quality and service have been widely recognized by the industry. Our company has its own factory, combined with the sales model of trade factory, we can provide customers with a full range of services. In addition, our company has international logistics partners to reduce transportation costs for customers. Our company is a leading manufacturer and supplier of Marine parts and auto parts in China. At the same time, we have established partnerships with hundreds of factories specializing in the production of various high-quality auto parts.

Our goal is to provide the best service at the best price, your satisfaction is our best return. Look forward to working with you. Welcome friends from all walks of life to visit, guidance and business negotiations.

📋 General & Procurement FAQs

Q1: What exactly is the 456-3645 part?

A: It is a genuine Common Rail Fuel Injector Assembly developed for engines using advanced High-Pressure Common Rail (HPCR) technology. It is highly precise, injecting fuel at extremely high pressures directly into the cylinder.

Q2: Which engines use this injector?

A: It is specifically engineered for the C9.3 ACERT heavy-duty diesel engine platform.

Q3: What are the interchangeable or Reman part numbers?

A: If you are sourcing factory-remanufactured or older versions, look for these cross-references:

• Cat Reman Part Number: 20R-5076

• Alternative Production Codes: 374-0751, 10R-9397

Q4: Does this injector require a trim code (IMA code) calibration when replaced?

A: Yes. Every 456-3645 injector comes with a unique, alphanumeric trim code printed on the injector head. When you replace an injector, you must program this code into the engine's Engine Control Module (ECM) using Cat Electronic Technician (Cat ET) software. Skipping this step causes poor emissions, rough idling, and reduced efficiency.

🛠️ Technical & Performance FAQs

Q5: What are the most common symptoms of a failing 456-3645 injector?

A: Common rail injectors operate under immense mechanical and thermal stress. Signs of deterioration include:

• Engine Misfires or Knocking: Caused by an uncalibrated trim code or an injector stuck open/closed.

• Excessive Smoke: White smoke typically points to unburnt fuel from a dripping nozzle; black smoke suggests incomplete combustion from poor fuel atomization.

• Hard Starting: Internal leakage inside the injector prevents the common rail from reaching its required starting threshold pressure.

Q6: What destroys a common rail injector faster than anything else?

A: Microscopic fuel contamination and water. Common rail systems operate at pressures often exceeding 2,000 bar (nearly 30,000 psi). At this level, tiny dirt particles act like sandblasters on the internal control valves. Water causes internal corrosion and cavitation, destroying the precise nozzle tips instantly.

Q7: What parts must be replaced alongside the 456-3645 injector?

A: For a reliable, leak-free installation, never reuse old hardware. Always replace:

• The O-rings and combustion seals (pre-installed on new genuine injectors, but required if pulling/inspecting).

• The High-Pressure Fuel Fuel Injection Lines ( strictly recommends replacing the steel lines upon removal to prevent microscopic metal flaking from entering the fresh injector).