Part Name: Bearing Connecting Rod 4W5739 328-5572
Part Number: 4W5739 328-5572
Basic Info.
| Parts no. | 4W5739 328-5572 | Material | steel |
| Type | Bearing Connecting Rod | Parts Type | Engineering machinery parts |
| Compatibility | Caterpillar | Transport Package | Wooden box |
| Trademark | DIRON | Origin | Luoyang City |
| HS Code | 84099991 | Production Capacity | 5000PCS/Year |
Product Details
- Date First Listed：2026/03/23
- Manufacturer：Diron Parts
Product Description
- Part Type：Bearing Connecting Rod
- Description: Bearing Connecting Rod 4W5739 328-5572 for Caterpillar, New
The 4W-5739 (also cross-referenced as 328-5572) is a precision-engineered aftermarket connecting rod bearing designed for Caterpillar® 3306 and select 3406 diesel engines. This critical bearing pair supports the connecting rod big-end journal, providing smooth, low-friction rotation while withstanding high combustion loads, inertial forces, and oil-film pressure in heavy-duty construction, mining, marine, and generator-set applications.
Key Features & Benefits
- Precision-machined bearing shells with exact crush height and wall thickness for proper fit and oil clearance
- Optimized eccentricity and oil groove design for excellent oil distribution and heat dissipation
- Strong resistance to fatigue, scoring, and cavitation under peak cylinder pressures
- Matched upper and lower halves for consistent load distribution
- 100 % inspected for dimensional accuracy, surface finish, and embeddability
- Proven performance in high-hour 3306/3406 engine rebuilds
Common Applications (Caterpillar® Compatibility)
- Engines: – 3306 (PC & DI) – 3406 (early mechanical configurations)
- Typical Machines: – Track-Type Tractors: D6D, D7G, D8K – Wheel Loaders: 966C, 966D, 980C – Excavators: 225, 235 – Off-Highway Trucks: 627B, 637D – Generator sets, marine propulsion, and industrial power units
Technical Specifications
- Part Number Reference: 4W-5739 / 328-5572
- Type: Connecting rod bearing pair (upper & lower halves)
- Journal Diameter Compatibility: Standard 3306/3406 rod journal (76.20 mm / 3.000 in)
- Bearing Width: Factory-matched specification
- Oil Groove: Full circumferential groove
- Weight (pair): ≈ 0.35–0.45 kg
Important Note:
- We only provide replacement products intended for aftermarket use in the Caterpillar machinery listed above. The brand name Caterpillar is used solely as reference information to indicate compatibility and does not imply that our products are OEM.
- Note: While this description provides general information, specific details such as size, weight and exact material may vary by manufacturer and specific application. To obtain the most accurate and up-to-date information, it is recommended to consult a qualified parts supplier such as DIRON PARTS.
FAQ
Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.
Q3. What is your terms of delivery?
A: FOB
Q4. How about your delivery time?
A: Generally, it will take 20 to 30 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q7. Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery
Q8. How do you make our business long-term and good relationship?
A:1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from
ABOUT DIRON
- Factory OF DIRON
Diron Parts Group Have Its Own Factory Ensure That We Offer Better Price For Customers. Besides, Diron Corporate With Some Reliable Principal Manufacturers, So Diron Also Supply Customer Other Quality Spare Parts.
- Team OF DIRON
With 18 years of manufacturing and exporting experience, Diron has a team of knowledgeable engineers, inspectors and technical workers, sales staff, after-sales personnel.
- Products OF DIRON
As a distributor, we supply parts covers for :Complete engines, Long block, Short block, Engine spare parts, Electricla products, Hydraulic products, Transmission products, Undercarridge products.Among them, Cylinder head, Cylinder block, Spacer-plate, Bushing & Pin are our best-selling products.
