Crankshaft Bearings for Komatsu 4D88 and Yanmar 4TNE88 Engines: 129150-02871, 129001-02931
The 129001-02931 crankshaft bearing is specifically designed for 4D88 and 4TNE88 series diesel engines. Constructed from high-strength alloy materials and subjected to precision machining and surface hardening treatments, it ensures the engine operates smoothly under high-speed and heavy-load conditions. This crankshaft bearing effectively reduces friction between the crankshaft and the bearing, thereby enhancing the engine's fuel efficiency and power output, while also extending its overall service life.
4D88 Engine Connecting Rod Bearing Specifications
| Product Name |
Engine Crankshaft Bearing |
| Part Number |
129001-02931 |
| Material |
Aluminum Alloy or Copper Alloy Composite |
| Dimensions |
STD |
| Minimum Order Quantity |
1 set |
| Payment Method |
Western Union, T/T |
| Shipping Method |
UPS/DHL/EMS/TNT/FedEx |
Compatible Models
Engines: 4D88, 4TNE88, 4TNV88
Kobelco Excavators: B84, SK45SR-2, SK50UR-3, Z75, Z76
Yanmar Excavators: B50B6-3, B6U, B7-5, VIO50, VIO55
Case Excavators: CX47, CX50B
Features and Advantages
High Wear Resistance: Manufactured using aluminum alloy or copper-based composite materials for superior wear resistance.
Precision Machining: Strict tolerance control ensures smooth crankshaft rotation.
High-Temperature Resistance: Capable of withstanding continuous operation in high-load, high-temperature environments.
Enhanced Engine Efficiency: Reduces friction to improve fuel economy.
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 Engine Engine Crankshaft Bearing 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.