ZAX330-5G Excavator Track Adjuster Assembly for Hitachi Undercarriage
The ZAX330-5G track adjuster assembly is engineered to maintain optimal track tension for Hitachi excavators operating in harsh environments. It features a forged recoil spring, a wear-resistant tension cylinder, and a reliable grease chamber system to ensure stable, long-term undercarriage performance with minimal maintenance.
| Piston Rod | 40Cr / 42CrMo (Hard Chrome Plated) |
|---|---|
| Cylinder Body | Q345 / 45# Steel / 40Cr |
| Return Spring | 60Si2Mn / 65Mn Spring Steel |
| Cylinder Head / End Cap | 45# Steel / Cast Steel |
| Grease Nipple & Fittings | Carbon Steel (Zinc Plated) / Stainless Steel |
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Kinton Parts is trusted by professionals worldwide for delivering high-quality parts for excavators, bulldozers, and other construction machinery—with guaranteed performance and durability.
In high-tonnage excavators like the Hitachi ZAX330-5G, the track adjuster (also called a recoil spring assembly) plays a vital role in maintaining consistent track tension during operations such as trenching, rock excavation, or hillside grading. It prevents track sagging or derailment by applying continuous forward force on the idler.
With the ZAX330-5G’s long working hours and heavy ground contact pressure, a robust and properly functioning adjuster protects the sprockets, idlers, and chain from abnormal wear, improves travel smoothness, and extends the life of the undercarriage system.
Advanced Manufacturing & Materials
Assembly Structure Diagram
This image shows the complete tension spring assembly, including:
- Recoil Spring – Coiled high-tension steel with precision winding to absorb movement
- Cylinder Housing – Heavy-duty forged steel body for housing and guiding the spring
- Front Yoke/Bracket – Connects to the idler wheel and transfers spring force
- Grease Chamber – Allows easy adjustment via grease gun
The diagram below shows how the components connect to form a compact and efficient tensioning system.
Cross-Sectional Sketch
The cross-section reveals the internal layout of the spring, plunger, and grease chamber.
You can clearly see:
- The sealed grease channel that builds pressure against the plunger
- The internal buffer zone, designed to cushion impact from external forces
- Grease seals and bushings for leak-free operation
This view helps users understand why our tensioner delivers stable, low-maintenance performance even under extreme stress.
Manufacturing and Material Details
Each ZAX330-5G track adjuster we produce goes through a carefully controlled manufacturing process:
- Cylinder & Piston: Forged from 40Cr or 45# steel, then CNC-machined for precision fitment and concentricity
- Heat Treatment: Surface quenching process hardens the piston rod to HRC 50–55 for better wear and impact resistance
- Spring Group: Made from 60Si2Mn spring steel, heat-treated to handle continuous high recoil loads without fatigue
- Grease Chamber: Allows for adjustable tension with a simple grease gun, eliminating the need for disassembly
- Finish: Anti-rust primer and paint coating protect against moisture, mud, and corrosive exposure
OEM Undercarriage Parts for Hitachi Excavator
| BRAND | MACHINERY MODEL NUMBER | |||||||
|---|---|---|---|---|---|---|---|---|
| HITACHI-EX/ZAX/ZX | EX30 | EX40 | EX55 | EX60 | EX60-2 | EX60-3 | EX60-5 | EX70 |
| EX75 | EX100 | EX100-3 | EX100-5 | EX120 | EX120-1 | EX120-3 | EX120-5 | |
| EX130-1 | EX200-1 | EX200-2 | EX200-3 | EX200-5 | EX200LC-1 | EX200LC-2 | EX200LC-3 | |
| EX200LC-5 | EX220-3 | EX220-5 | EX270 | EX270-1 | EX270-2 | EX270-5 | EX270LC-1 | |
| EX270LC-2 | EX270LC-5 | EX300 | EX300-1 | EX300-2 | EX300-3 | EX300-5 | EX300A | |
| EX300LC-1 | EX300LC-2 | EX300LC-3 | EX300LC-5 | EX330 | EX370 | EX400-1 | EX400-2 | |
| EX400-3 | EX400-5 | EX400LC-1 | EX400LC-2 | EX400LC-3 | EX400LC-5 | EX450 | EX450-1 | |
| EX450-2 | EX450-3 | EX450-5 | EX450LC-1 | EX450LC-2 | EX450LC-3 | EX450LC-5 | UH07-7 | |
| ZAX30 | ZAX55 | ZAX200 | ZAX200-2 | ZAX330 | ZAX450-1 | ZAX450-3 | ZAX450-5 | |
| ZX30 | ZX33 | ZX38U | ZX40 | ZX55 | ZX60 | ZX70 | ZX75US | |
| ZX120 | ZX130 | ZX160LC | ZX200 | ZX210 | ZX240 | ZX270 | ZX330 | |
| ZX360 | ZX400 | ZX450 | ZX470 | ZX500 | ZX650 | ZX850 | ZX870 | |
Looking for a specific make or model not listed here? Reach out and we’ll be happy to assist.
Fitment & OEM Reference Numbers
This assembly is engineered for:
- Hitachi ZAX330-5G
- Also compatible with ZX330-3 / ZX330-3 / ZAX330-5G depending on undercarriage match
If you're unsure about fitment, send us your machine's serial number or adjuster specs—we’ll match you with the correct part.
Why Choose Our ZAX330-5G Track Adjusters?
- Heavy-Duty Construction – Built for high-load excavators in demanding jobsite conditions
- Precision Tension Control – Ensures smoother travel, better balance, and less stress on the chain
- Reliable Spring & Seal Group – Resistant to deformation and leakage under continuous use
- OEM/ODM Branding Support – We offer logo stamping, label customization, and bulk packaging solutions
- Pre-Shipment Verification – We provide photos or videos before shipment for your quality inspection
Application Scenarios
The ZAX330-5G adjuster is ideal for demanding excavator tasks such as:
- Quarry operations with sharp terrain fluctuations
- Earthmoving projects requiring long travel cycles
- Rock excavation in high-impact environments
- Grading and trenching on slopes or clay-rich soil
Its reliable grease-based adjustment system ensures field efficiency without needing extensive servicing.
SHIPPING & DELIVERY
At Kinton Parts, we ensure reliable, worldwide shipping of parts for excavators, bulldozers, and a full range of construction machines—safe, fast, and secure.
All products are securely packed using high-quality export cartons, reinforced wooden cases, or industry-standard palletized packaging to ensure maximum protection during transit and smooth handling during unloading.
Standard orders are typically shipped within 3–5 working days, while large or customized orders are usually dispatched within 7–20 days, depending on volume and production requirements.
We offer flexible global shipping options, including:
- International sea freight for cost-effective bulk transport
- Air freight for urgent orders
- Courier delivery (DHL, FedEx, UPS) for small-volume or sample shipments
Our logistics team manages every shipment carefully, providing real-time updates and tracking information until your order arrives safely at your destination.
Need assistance choosing the best shipping method for your location and timeline? Contact our team — we’ll help you plan a smooth delivery experience.
FAQ
Q: What are your main products?
A: We supply a full range of undercarriage and wear parts for excavators, bulldozers, and other heavy equipment. Our product line includes: Track rollers, carrier rollers, front idlers, sprockets, segments, track shoes, track chains, bolt and nuts, pins and bushings, bucket teeth and adaptors, filters, seal kits, swing bearing, and hydraulic cylinder—plus other essential replacement parts.
Q: Which countries do you export to?
A: Kinton Parts exports to over 60 countries worldwide, including:
USA, Canada, UK, Germany, Russia, UAE, Indonesia, Malaysia, Thailand, India, Pakistan, Bangladesh, Sri Lanka, South Africa, Colombia, Peru, and many others.
Q: Can I order a sample?
A: Yes, we accept trial orders. For parts in stock, samples can be shipped quickly. If you have technical drawings or existing samples, we also support customized production and mold development.
Q: How can I track my order after shipping?
A: Once your order is shipped, we will provide you with all necessary tracking information based on the shipping method. For express deliveries, you’ll receive a tracking number to follow the shipment online. For air or sea freight, we’ll send you the relevant documents such as the airway bill (AWB) or bill of lading (B/L), along with the packing list and commercial invoice to help with tracking and customs clearance.
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Trusted by professionals worldwide, Kinton Parts supplies premium-quality components for excavators, bulldozers, and more—with reliable quality you can count on.
