We manufacture forged Doosan U-Yoke, the critical link between hydraulic track adjuster and idler in tracked undercarriages.
Factory-direct production with full OEM manufacturing services supports global distributors and equipment fleets with exact-fit components.
Precision machined U-Yoke eliminates premature idler misalignment and track recoil failure, reducing expensive excavator downtime in demanding conditions.
Dingtai has over 20 years of undercarriage component manufacturing experience and is ISO9001/SGS certified for consistent material traceability and quality.
Each U-Yoke is forged from 35MnB steel, deep quenched and tempered to achieve high core hardness and impact resistance.
Core Selling Points
- Premium 35MnB Material: Forged from high-tensile 35MnB steel for superior load-bearing capacity and resistance to bending under heavy track recoil stress.
- Precision Forging: Precision forged blanks ensure uniform grain flow and structural integrity, eliminating weak points found in cast alternatives.
- Deep Quenching/Heat Treatment: Through hardened and tempered to achieve consistent HRC 48–55, extending service life under abrasive mining and quarrying conditions.
- 100% QC Inspection: Every U-yoke undergoes dimensional inspection, magnetic particle testing, and hardness verification before final packing and shipment.
Our catalog of Doosan U-Yoke includes various specifications, fully compatible with Doosan excavators and bulldozers.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Material | 35MnB / 40Cr high-tensile alloy steel |
| Hardness | HRC 48–55 after deep quenching and tempering |
| Heat Treatment Depth | 3–6 mm effective hardened zone at pin bores and yoke ears |
| Process | Precision forging, CNC machining, magnetic particle inspection |
| Certification | ISO9001:2015, SGS material test report |
| Warranty | 12 months or 2,000 operating hours |
OEM & Customization
We manufacture from customer drawings or OEM samples, controlling key dimensions and tolerances to ensure direct interchangeability with existing Doosan undercarriage assemblies.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavators | Doosan | DX140, DX225, DX300, DX350, DX420, DX520 |
| Crawler Excavators | Doosan | DH150, DH225, DH300, Solar 220, Solar 300 |
Delivery & Logistics
Flexible MOQ, factory-direct pricing, and export-grade packing support sea and air freight to North America, Latin America, Southeast Asia, and Middle East markets.
Technical Features
The U-yoke transmits recoil forces from the track adjuster to the idler, maintaining correct track tension. Its forged 35MnB body resists fatigue cracking.
Deep quenching develops a martensitic structure in high-stress zones, while precision boring ensures exact pin alignment and smooth idler movement.
CNC-machined yoke ears maintain tight parallelism tolerances, reducing uneven idler wear, track misalignment, and derailment risk.
Applications
- Mining: haul road maintenance and pit floor grading with high-impact track loads.
- Road Construction: fine grading and shoulder work where track tension stability is critical.
- Quarrying: continuous operation on abrasive blasted rock.
- Demolition: high-vibration work requiring fatigue-resistant undercarriage components.
- Heavy Earthmoving: mass excavation and site preparation.
Frequently Asked Questions
What is the minimum order quantity for Doosan U-yoke?
10 pieces per specification. Mixed model trial orders can be arranged for new distributors.
What is the standard delivery time?
15–25 days for standard forged and machined U-yokes. Custom non-stock dimensions require 30–45 days.
What material and heat treatment do you use?
35MnB high-tensile steel, deep quenched and tempered to HRC 48–55. Surface hardness verified by Rockwell testing.
Can you match original Doosan part numbers?
Yes. Provide the OEM part number or drawing. We cross-reference dimensional data and manufacture to direct interchangeability standards.
What is your warranty policy?
12 months or 2,000 operating hours against material and manufacturing defects, excluding normal wear and improper installation.
How do you inspect the U-yoke before shipment?
100% dimensional inspection, hardness testing, and magnetic particle testing for surface cracks and forging defects.
Are these suitable for mining applications?
Yes. Precision forging and through hardening provide high-impact toughness required in mining and quarrying.
How do I confirm the correct part number?
Check the casting number on the old U-yoke or send photos and key dimensions. We verify against Doosan parts books.
Maintenance Guide
- Inspect yoke ears, pin bosses, and bolt holes for cracks or elongation every 500 operating hours.
- Check idler alignment before installation. Misalignment accelerates yoke and idler wear.
- Measure pin bore clearance. Replace the U-yoke if wear exceeds OEM maximum or 2 mm ovality.
- Grease pin contact surfaces with lithium-based extreme pressure grease during assembly.
- Replace pins, seals, and retainers when installing a new U-yoke to ensure balanced service life.