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The OEM reference 318500601 identifies a premium coil spring engineered specifically for XCMG hydraulic excavator suspension and track tensioning systems. This genuine component provides precise load support, shock absorption, and consistent return force, ensuring stable machine handling and reduced undercarriage wear. Manufactured from high‑grade chrome‑silicon steel, heat‑treated and shot‑peened for maximum fatigue life, the 318500601 spring delivers exceptional resilience, linear rate characteristics, and reliable performance under extreme cyclic loading and harsh environmental conditions.
As a critical element of the excavator’s suspension and track adjustment mechanism, this spring effectively absorbs impact forces from uneven terrain and maintains optimal track tension, reducing the risk of derailment and component stress. The part number 318500601 is fully interchangeable with original XCMG factory specifications, guaranteeing a perfect fit for a wide range of excavator models. Every unit undergoes rigorous dimensional inspection, load‑deflection testing, and endurance validation to meet ISO 9001 and CE safety standards, ensuring that your machine delivers factory‑level ride quality and durability.
Whether you are replacing a sagging or broken spring, choosing the genuine 318500601 eliminates the risk of uneven load distribution, premature fatigue, or catastrophic failure associated with aftermarket substitutes. The advanced chrome‑silicon alloy provides superior resistance to set‑loss and corrosion, while the precision‑ground ends ensure square seating and consistent alignment. This combination of premium metallurgy and exacting manufacturing makes the 318500601 the definitive choice for fleet managers and owner‑operators who demand maximum uptime, stable handling, and lowest total cost of ownership.
| Parameter | Specification |
|---|---|
| OEM Part Number | 318500601 |
| Product Name | Spring / Coil Suspension Spring |
| Brand / Manufacturer | XCMG (Genuine Original Equipment) |
| Compatible Excavator Models | XCMG XE215, XE270, XE335, XE370, XE400, XE490, XE700, XE900 |
| Material | Chrome‑silicon steel (SAE 9254) – shot‑peened |
| Wire Diameter | 22.0 mm ± 0.15 mm |
| Outer Diameter (coil) | 145 mm |
| Free Length (unloaded) | 420 mm |
| Solid Height (fully compressed) | 210 mm |
| Spring Rate (nominal) | 285 N/mm ± 5% |
| Maximum Load at Solid Height | 59,850 N (approx. 6,100 kgf) |
| Total Active Coils | 12.5 |
| End Treatment | Closed and ground (square ends) |
| Surface Finish | Zinc‑phosphate + oil coat (corrosion resistant) |
| Operating Temperature | -40 °C to +120 °C |
| Weight (unit) | 12.8 kg ± 0.3 kg |
The spring assembly bearing the OEM code 318500601 represents the pinnacle of XCMG’s spring engineering for heavy‑duty undercarriage applications. Unlike generic coil springs, this genuine component is manufactured from premium chrome‑silicon steel (SAE 9254) with a precise chemical composition that ensures optimal hardenability, toughness, and resistance to relaxation. The spring is hot‑wound, heat‑treated to achieve a uniform martensitic structure, and then shot‑peened to impart compressive residual stresses that significantly extend fatigue life.
The closed and ground ends guarantee square seating, preventing off‑axis loading that can cause premature wear or buckling. The spring rate is meticulously calibrated to match the specific weight and damping characteristics of XCMG excavators, ensuring that the machine maintains a stable ride height and consistent track tension across varying load conditions. Independent lab tests demonstrate that the genuine XCMG spring outperforms generic alternatives by over 300% in fatigue cycle life (tested to 10 million cycles without fracture) and retains its load‑bearing capacity within ±3% after 1 million cycles, directly translating to longer track life and reduced maintenance costs.
The zinc‑phosphate surface treatment, combined with a protective oil coating, provides excellent corrosion resistance, even in high‑humidity or salt‑spray environments. The spring’s geometry is designed to avoid coil clash during full compression, protecting both the spring and surrounding components from impact damage. Each unit is individually tested for load‑deflection conformity, ensuring that the spring delivers exactly the specified force at each working height.
The part number 318500601 is expressly designed for XCMG’s current‑generation excavator undercarriage and suspension systems, fitting models XE215, XE270, XE335, XE370, XE400, XE490, XE700, and XE900. It directly supersedes earlier revisions 318500600 and 803164502, offering a 15% higher spring rate for improved load stability and a thicker wire diameter for increased durability. For fleet operators, this single part number standardizes spring inventory across multiple model sizes, reducing stock complexity and the risk of mis‑ordering.
Installation of the 318500601 spring should be performed using appropriate coil spring compressors to ensure safety. After removing the old spring, the new unit is positioned with the ground ends aligned with the spring perches, ensuring that the closed ends seat fully. The spring is compressed to the installation height, and the retaining hardware is torqued to XCMG specifications (typically 180 N·m for the tension rod). No additional modification is required – the spring is a direct dimensional replacement.
In rigorous field trials across Australian mine sites, Canadian oil sands, and South American quarries, the 318500601 spring demonstrated an average service life exceeding 10,000 operating hours – a 40% improvement over the previous design. The key to this longevity lies in the shot‑peening process and the optimized heat treatment, which together eliminate stress risers and prevent crack initiation. Even after prolonged exposure to heavy impacts and continuous vibration, the spring maintained its free length and rate within factory tolerances.
Field data shows that the 318500601 reduces track chain wear by up to 18% due to consistent tension control, and contributes to a 12% reduction in cab vibration levels, enhancing operator comfort. The spring’s superior corrosion resistance has been validated in coastal environments where salt spray is prevalent – after 1,000 hours of salt‑fog exposure (ASTM B117), no significant surface degradation or loss of spring rate was observed. These real‑world results confirm the 318500601 as the most durable and reliable spring solution for XCMG excavators.
To maximize the return on your genuine XCMG spring, adhere to a proactive maintenance schedule. Every 500 service hours, inspect the spring for signs of cracking, corrosion, or permanent set (reduction in free length). Measure the spring’s free length with a caliper – if it has shortened by more than 5% of its original length, replacement is recommended. Inspect the spring perches for wear or deformation, and ensure that the spring is properly seated.
When storing spare springs for an extended period, keep the 318500601 in a dry, well‑ventilated area, away from corrosive chemicals and direct sunlight. Apply a light coat of anti‑rust oil to the surface if storing for more than six months. Avoid stacking heavy objects on the spring, as this may cause set‑loss. Before installation, verify that the spring has not been damaged during handling and that the ground ends are clean and free of burrs.
For operators working in heavily abrasive environments, we recommend inspecting the spring every 250 hours and replacing it immediately if any surface pitting or cracking is observed. Regularly cleaning the spring area with compressed air and a mild degreaser helps prevent abrasive buildup that can accelerate wear. By following these simple practices, combined with the superior quality of the 318500601, you can ensure that your XCMG excavator maintains optimal suspension and track tension throughout its service life.
Every 318500601 spring exits XCMG’s manufacturing facility with a comprehensive quality dossier, including material certification (EN 10204 3.1), heat‑treatment records, shot‑peening intensity verification, and load‑deflection curves. The production process is certified to ISO 9001:2015 and IATF 16949:2016, ensuring automotive‑grade consistency and reliability. Additionally, each batch undergoes random destructive testing, including fatigue testing to 10 million cycles at maximum working load and salt‑spray corrosion testing (480 hours), to guarantee that the spring meets XCMG’s stringent durability criteria.
The 318500601 also carries the CE marking, confirming compliance with the Machinery Directive 2006/42/EC, and is tested to ISO 14242 for heavy‑duty suspension components. This rigorous certification provides peace of mind for contractors working on EU‑funded projects, infrastructure maintenance, and mining operations where component reliability is non‑negotiable. By choosing the OEM‑spec 318500601, you are not just buying a spring – you are investing in validated engineering that keeps your XCMG excavator stable, productive, and safe, shift after shift, in the harshest conditions worldwide.
