Dingtai manufactures Hitachi track adjust assemblies that maintain precise crawler track tension, stabilizing the idler and preventing derailment during heavy excavator operations.
We operate factory-direct production with comprehensive OEM manufacturing services, serving North American distributors, rental fleets, and aftermarket parts suppliers worldwide.
Our assemblies resist abrasive wear and hydraulic leakage, eliminating unplanned downtime caused by broken seals, bent rods, or collapsed tension cylinders.
With 20+ years of manufacturing experience and ISO9001/SGS certified processes, we deliver consistent batch quality and traceable material certifications for every order.
We use 35MnB forged steel, deep quenching, and precision chrome-plated rods to ensure high load capacity and long service life.
Core Selling Points
- Premium 35MnB Material: Cylinder bodies are forged from 35MnB steel, providing higher yield strength and impact toughness than standard carbon steel in high-load undercarriage applications.
- Deep Quenching/Heat Treatment: Controlled deep quenching hardens wear surfaces to HRC 50-55, improving resistance to scoring, deformation, and fatigue fracture under continuous track tension.
- Global Brand Compatibility: Assemblies are reverse-engineered to match Hitachi OEM mounting dimensions, grease ports, and pressure ratings for direct bolt-in replacement across EX and ZX series.
- ISO9001/SGS Certified: Every batch undergoes documented ISO9001 quality control and SGS material verification, ensuring repeatable hardness, dimensional accuracy, and leakage-free performance.
Our catalog of Hitachi Track Adjust Assembly includes various specifications, fully compatible with Hitachi EX, ZX, and mining-class excavators and crawler machines.
Why Choose Dingtai?
Production Technical Parameters
| Parameter | Specification |
|---|---|
| Body Material | 35MnB forged steel |
| Rod Material | Induction-hardened 45# steel with hard chrome plating |
| Hardness | HRC 50-55 quenched surface |
| Process | Precision forging, CNC machining, deep quenching, honing, assembly |
| Seal Type | Heavy-duty polyurethane / nitrile seal kit |
| Certification | ISO9001, SGS |
| Warranty | 12 months or 2,000 working hours |
OEM & Customization
We match Hitachi OEM drawings, part numbers, and mounting dimensions. Custom rod lengths, grease port positions, and paint finishes are available to meet fleet specifications.
Applicable Models
| Machine Type | Compatible Brands | Popular Series/Models |
|---|---|---|
| Crawler Excavator | Hitachi | EX100, EX120, EX200, ZX200, ZX330, ZX470 |
| Mining Excavator | Hitachi | EX1200, EX1900, EX2600, EX3600 |
| Heavy-Duty Crawler Excavator | Hitachi | ZX650, ZX870, ZX890 |
Delivery & Logistics
Factory-direct pricing with MOQ from 2 units. We ship FOB Xiamen or CIF to major US ports; standard models dispatch in 7-15 days.
Technical Features
The assembly functions as a grease-actuated hydraulic cylinder. Grease pressure moves the piston rod forward, pushing the idler outward to maintain track tension.
Deep quenched 35MnB steel cylinder walls resist high-pressure deformation, while the chrome-plated rod minimizes friction and prevents seal scoring during operation.
An integrated relief valve releases excessive grease pressure automatically, protecting the track chain, idler, and final drive from destructive over-tension loads.
Applications
- Mining
- Road Construction
- Quarrying
- Demolition
- Heavy Civil Construction
- Forestry and Land Clearing
Frequently Asked Questions
What is the MOQ for Hitachi track adjust assemblies?
MOQ is 2 units for standard models. OEM custom orders may require 10-20 units depending on tooling and drawing confirmation.
What is the delivery time?
Standard stock models ship within 7-15 days. Custom production takes 25-35 days after drawing confirmation and deposit receipt.
What material and heat treatment do you use?
Cylinder bodies are 35MnB forged steel with deep quenching. Piston rods are induction hardened to HRC 50-55 and hard chrome plated.
What warranty is provided?
12 months or 2,000 working hours from shipment, whichever comes first, covering manufacturing defects under normal operating conditions.
Can you match Hitachi part numbers?
Yes. Provide OEM part numbers or drawings. We cross-reference and produce exact fit assemblies with equivalent installation dimensions and pressure ratings.
Are these compatible with Deere excavators built by Hitachi?
Many John Deere excavator models use Hitachi undercarriage designs. Confirm model and serial number for accurate matching.
Maintenance Guide
- Clean mounting bores and lubricate seal surfaces before installation. Torque bolts to Hitachi OEM specifications to prevent alignment stress.
- Pump grease slowly until track sag meets OEM specification. Never exceed maximum recommended pressure or over-tension the track chain.
- Inspect the assembly every 250 operating hours for grease leakage, rod scoring, cylinder cracks, or bent piston rods.
- Replace the assembly if track tension cannot be maintained, the relief valve frequently opens, or visible damage compromises seal integrity.