Basic Info.
| Part no. | 4t0203 | Material | Steel |
| Type | Pin | Part 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：2025/11/21
- Manufacturer：Diron Parts
Product Description
- Part Type：Pin
- escription: Replacement Part Pin 4t0203 Suitable for Caterpillar, New
The 4T-0203 is a premium-quality aftermarket bucket pivot pin (also known as bucket-to-linkage pin or dogbone pin) manufactured as a direct, fully interchangeable replacement for the original Caterpillar® part number 4T0203 (4T-0203). This heavy-duty pin connects the bucket to the linkage (power link/dogbone) on medium-sized hydraulic excavators, enduring extreme digging forces, shock loads, and abrasive conditions in construction, quarrying, and demolition applications.
Key Features & Benefits
- Precision machined from high-strength 1045/4140 alloy steel with optional induction hardening for superior toughness
- Thick hard-chrome plating (where applicable) provides excellent wear and corrosion resistance
- Exact OEM dimensions and tolerances – 100% drop-in fit, no modifications or shimming needed
- Grease grooves and drilled lubrication ports for easy greasing and reduced friction
- High shear and impact strength designed to handle maximum breakout force
- Significant cost savings compared to genuine parts while maintaining reliable field performance
Common Applications (Caterpillar® Compatibility)
- Hydraulic Excavators – bucket to linkage (dogbone) pivot: – 320, 320B, 320C, 320D (early series) – 321B, 321C, 321D – 322B, 322C – EL200B, E200B (older equivalents)
- Critical high-load component in the bucket linkage assembly of these popular 20–25 ton class machines
- Widely used worldwide in general construction, rental fleets, and utility work
Technical Specifications
- Part Number: 4T-0203 (aftermarket equivalent to Caterpillar® 4T0203)
- Type: Bucket-to-linkage pivot pin
- Material: Heat-treated alloy steel (hard chrome plated on request)
- Outside Diameter: 80 mm (3.15 in)
- Usable Length: Approximately 280–310 mm (varies slightly by exact model)
- Weight: Approx. 12–14 kg (26–31 lb)
- Quantity per machine: 1 (plus associated retainer hardware)
- Common Related Parts: Seals 096-1568, Collar 4T-7015, Shim packs
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.
