The U-yoke is a forged steel link within the track chain assembly, connecting track links and enabling smooth, articulated movement under extreme loads.
As a factory-direct manufacturer, Dingtai offers comprehensive OEM services for global equipment buyers—eliminating middlemen and ensuring direct engineering support.
Our U-yokes resist deformation and fatigue cracking, preventing sudden track failure and reducing costly unplanned downtime in severe undercarriage applications.
With over 20 years of specialized experience, Dingtai operates under ISO9001 quality systems and provides SGS-verified material certificates for every shipment.
Each yoke is forged from 35MnB alloy steel and undergoes deep induction quenching, delivering a hard, wear-resistant surface combined with a shock-absorbing tough core.
Core Selling Points
- Global Brand Compatibility: Engineered to match Caterpillar OEM specifications exactly, ensuring drop-in installation across D3–D11 dozers and 320–390 excavators without modification.
- Premium 35MnB Material: Forged from high-tensile 35MnB alloy steel, our U-yokes deliver superior yield strength and exceptional resistance to fatigue crack propagation.
- Deep Quenching / Heat Treatment: Advanced induction hardening penetrates 3–5 mm into wear surfaces (HRC 50–55) while the tough core absorbs impact, effectively doubling service life.
- ISO9001 / SGS Certified: Each production batch undergoes 100% dimensional and hardness inspection, with full SGS traceability reports supplied as standard.
Our catalog of Caterpillar U-Yoke includes various specifications, fully compatible with Caterpillar excavators and bulldozers.
Why Choose Dingtai?
1. Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB Alloy Steel |
| Surface Hardness | HRC 50–55 |
| Core Hardness | HRC 30–35 |
| Manufacturing Process | Hot Forging, CNC Machining, Induction Quenching |
| Certification | ISO9001, SGS |
| Warranty | 12 months against manufacturing defects |
2. OEM & Customization
We duplicate U-yoke designs from your drawings or physical samples, offering custom pin bore diameters, yoke widths, and anti-corrosion coatings to meet exact fleet requirements.
3. Applicable Models
| Machine Type | Compatible Brands | Popular Series / Models |
|---|---|---|
| Bulldozer | Caterpillar | D3, D4, D5, D6, D7, D8, D9, D10, D11 |
| Excavator | Caterpillar | 320, 323, 325, 329, 330, 336, 345, 349, 374, 390 |
4. Delivery & Logistics
Dingtai ships from major Chinese ports with professional export packing. We offer competitive EXW/FOB pricing and a low trial MOQ starting from 10 pieces.
Technical Features
The U-yoke is hammer-forged from a single billet, aligning grain flow along primary stress paths and eliminating the brittle zones typical of cast alternatives.
Post-machining, the pin bores are induction hardened under precise thermal control. This creates a deep wear-resistant casing that prevents galling and abrasive ingress.
Precision boring ensures exact pin-to-bore clearance. Optimized fitment reduces internal friction, prolonging the life of mating pins and bushings across the entire track chain.
Applications
- Open-pit mining
- Heavy earthmoving
- Quarrying and aggregate processing
- Highway and railway construction
- Land reclamation
- Forestry and demolition
Frequently Asked Questions
Q: What is the minimum order quantity?
A: MOQ is 10 pieces for trial evaluation. Volume pricing applies to container loads.
Q: How long does delivery take?
A: Standard delivery is 20–25 days. Express air freight can be arranged for urgent downtime needs.
Q: How deep is the hardened layer?
A: Induction hardening achieves a case depth of 3–5 mm, holding HRC 50–55 for maximum wear resistance.
Q: Do you offer a warranty?
A: Yes, a 12-month warranty covers material and manufacturing defects under normal operating conditions.
Q: Can you match my specific Caterpillar part number?
A: Certainly. Provide your OEM part number (e.g., 9W prefix) and we will cross-reference and manufacture an exact duplicate.
Q: What material certifications are provided?
A: SGS chemical composition and mechanical property reports are supplied with every shipment.
Q: Are these U-yokes interchangeable with OEM parts?
A: Yes, they are machined to OEM tolerance. Installation requires zero modification.
Q: What measurements are needed for custom orders?
A: Supply pin diameter, yoke width, and bore spacing. We also reverse-engineer from a sample.
Maintenance Guide
- Inspect track chain for elongation and visually check U-yokes for cracks every 250 operating hours.
- During replacement, clean pin bores thoroughly and apply a dry-film anti-seize compound to prevent fretting.
- Torque track shoe bolts to specification; re-torque after the first 50 hours of operation.
- Monitor pin seal integrity—replace the U-yoke if pin bore clearance exceeds wear limits.