Komatsu 4D84-2 4D84-2A Engine Diesel Injection Pump 729436-51360 - Parts for Mini Excavators
The 729436-51360 is a mechanical fuel injection pump for the
Komatsu 4D84-2 diesel engine. Its main function is to pressurize diesel fuel and precisely deliver it to the injectors according to engine operating conditions, ensuring a stable fuel supply to the combustion chamber.
4D84-2 Engine Diesel injection pump Specifications
| Product Name |
Diesel Engine Fuel Injection Pump |
| Part Number |
729436-51360 |
| Fuel System Type |
Mechanical Inline Injection System |
| Minimum Order Quantity |
1 piece |
| Payment Method |
Western Union, T/T |
| Shipping Method |
UPS/DHL/EMS/TNT/FedEx |
Replaceable Part Number: YM729436-51360,729555-51310
Applicable Engines: 4D84-2, 4D84-2A
Application Equipment: Mini Excavators / Construction Machinery / Industrial Power Equipment
Features and Advantages
Precise Fuel Supply Control: Achieves stable fuel injection quantity and timing through a mechanical cam structure.
Significant Power Recovery: Improves issues such as difficulty starting, weak acceleration, and black smoke.
Low Maintenance Costs: Mature structure, convenient repair and replacement.
Stable Operating Conditions: Suitable for continuous operation environments of construction machinery.
Guangzhou Minshun Machinery Equipment Co., Ltd.
We specialize in the sales and service of diesel engine assemblies and construction machinery parts. Our product line covers engine assemblies, filtration systems, electronic control components, hardware accessories, wiring harnesses, and electrical accessories. Our service area includes Canada, the United States, the United Kingdom, Mexico, the Netherlands, Kazakhstan, Mongolia, Russia, Australia, Malaysia, Turkey, Indonesia, Singapore, Thailand, South America, South Africa, and other countries and regions.
Our Product Range
| Engine Rebuild Kit |
Turbochargers |
Engine Diesel Pumps |
Engine Controllers (ECU) |
| Cylinder Blocks |
Cylinder Heads |
Water Pumps |
Injectors |
| Starter Motors |
Filters |
Other Engine Accessories |
Excavator Hydraulic Pumps |
| Swivel Components |
Distributor Valves |
Travel Motor Assemblies |
Chassis Components and Other Accessories |


Frequently Asked Questions
Q1: What is your main products?
A1: We are specialized in the excavator engine spare parts, for example Main cylinder block, cylinder head, crankshaft, Engine assembly, piston, cylinder liner, piston ring, camshaft, connecting rod, oil pump, water pump, valve series products, movement, etc. almost all parts of the entire engine.
Q2: Do you test all products before shipping?
A2: Yes, we conduct 100% testing before shipping.
Q3: Which engine models is this Diesel Engine Fuel Injection Pump compatible with?
A3: This product is designed for specific diesel engine models. If you can provide the engine model or original part number, we can confirm compatibility before shipping to avoid incompatibility issues.
Q4: Can you provide cross-reference information for OEM part numbers?
A4: Yes, we support original part interchange. Please provide the original part number, and we will verify the replacement part accordingly.
Q5: What should I do if there is a problem with the product?
A5: Our products undergo professional testing and are of very stable quality. If you do find any problems, please contact us. We have a professional after-sales team to help you solve the problem.
Why Choose Us?
• Over 20 years of focus on construction machinery – offering a full range of excavator assemblies and accessories.
• Get a Quote – Our professional team will provide you with a quote immediately upon receiving your requirements.