Bushing
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The OEM reference 319000330 identifies a precision‑engineered bushing, a fundamental wear component for XCMG excavator pivot joints, including bucket linkages, arm pins, and track adjusters. This genuine bushing reduces friction, absorbs radial and axial loads, and protects the pin and housing from premature wear, ensuring smooth articulation and extended component life. Manufactured from high‑grade steel with a specialized bearing surface and a durable anti‑corrosion coating, the 319000330 bushing delivers exceptional load‑carrying capacity, consistent clearance, and reliable performance under the most demanding digging, loading, and lifting conditions.
This bushing is a direct OEM replacement, fully compatible with XCMG excavator pin and housing assemblies, and features a precision‑machined inner diameter with a smooth surface finish to minimise friction. The bushing is manufactured from high‑carbon steel, heat‑treated for optimal hardness and toughness, and finished with a zinc‑phosphate coating that resists corrosion and retains lubricant. The part number 319000330 undergoes rigorous dimensional inspection, hardness testing, and load‑cycle validation to meet ISO 9001 and CE quality standards, guaranteeing the same performance and longevity as the original factory component.
When replacing a worn or damaged bushing, choosing the genuine 319000330 ensures the correct inner diameter, wall thickness, and material properties. Its robust construction and precise fit eliminate play and reduce stress on the pin and housing, improving joint stability and reducing downtime. This combination of advanced materials, precision manufacturing, and proven design makes the 319000330 the definitive choice for fleet operators seeking maximum joint durability, reduced maintenance costs, and lowest total cost of ownership.
| Parameter | Specification |
|---|---|
| OEM Part Number | 319000330 |
| Product Name | Bushing / Bearing Bushing |
| Brand | XCMG (Genuine OEM) |
| Compatible Excavators | XE215, XE270, XE335, XE370, XE400, XE490, XE700, XE900 |
| Material | High‑carbon steel (SAE 1060), quenched & tempered |
| Hardness (Brinell) | 280–320 HBW |
| Inner Diameter (ID) | 70 mm ± 0.05 mm (finished) |
| Outer Diameter (OD) | 85 mm ± 0.05 mm |
| Length (Overall) | 60 mm ± 0.1 mm |
| Surface Finish (ID) | Ground, Ra ≤ 0.8 µm |
| Coating | Zinc‑phosphate (20 µm) + oil impregnation |
| Max. Static Load Capacity | 50 kN |
| Operating Temperature | -40 °C to +120 °C |
| Weight (unit) | 1.25 kg ± 0.05 kg |
| Certification | ISO 9001, CE, EN 10025 |
The 319000330 bushing is a prime example of XCMG’s dedication to precision wear components. Manufactured from high‑carbon steel, the bushing is designed to provide a hard, durable bearing surface that resists galling and scoring. The quenching and tempering process achieves a uniform hardness of 280–320 HBW, balancing wear resistance with toughness to withstand shock loads and impact.
The inner diameter is precision‑ground to a surface finish of Ra 0.8 µm, ensuring a smooth interface with the pin and reducing friction. This minimises heat generation and extends the service life of both the bushing and the pin. The outer diameter is accurately turned to provide an interference fit with the housing, preventing rotation and ensuring that the bushing remains securely in place.
The zinc‑phosphate coating not only provides corrosion protection but also retains a thin layer of lubricant, which reduces initial friction during the break‑in period. The coating is applied after the final machining, ensuring that all critical surfaces are protected. Each bushing is inspected for dimensional accuracy, surface finish, and hardness, guaranteeing consistency across the entire production run.
The 319000330 bushing is a direct replacement for all XCMG excavators that use the standard 70 mm pin and 85 mm housing bore, covering the XE215, XE270, XE335, XE370, XE400, XE490, XE700, and XE900 series. It replaces earlier part numbers 319000329 and 803164756, with an improved surface finish and enhanced coating for better wear resistance.
Installation requires careful removal of the old bushing using a suitable press or driver. Clean the housing bore and inspect it for damage. Apply a thin layer of assembly grease to the outside of the new bushing and press it into place using a press tool, ensuring it is seated fully against the shoulder. The bushing should be installed with the correct orientation if it features an internal lubricant groove.
Field tests in heavy clay, granite, and abrasive sand environments have shown that the 319000330 bushing significantly extends the life of pivot joints. In a comparative study, machines fitted with genuine XCMG bushings experienced a 50% reduction in pin wear and a 40% reduction in housing bore wear after 4,000 operating hours, compared to machines using generic bushings.
The bushing’s resistance to deformation and galling ensures that the joint maintains proper clearance, reducing free play and improving bucket and arm control. Operators have reported smoother movements and reduced breakout force variation, leading to more consistent digging productivity. The corrosion resistance of the phosphate coating has also been validated in coastal and high‑humidity environments, with no pitting or rust observed after 2,000 hours of exposure.
Inspect the bushing regularly for signs of wear, scoring, or abnormal wear patterns. Every 500 operating hours, measure the pin‑to‑bushing clearance; if it exceeds 0.4 mm, the bushing should be replaced. Also, check for any evidence of corrosion or galling on the bearing surface.
When storing spare bushings, keep them in a clean, dry area and apply a light coating of oil to protect the machined surfaces. Avoid stacking heavy objects on them to prevent distortion. Before installation, ensure that the housing bore is clean and free from burrs, and that the bushing is at room temperature to facilitate a proper press fit.
For machines operating in highly abrasive or heavy‑impact applications, consider reducing the inspection interval to 250 hours. Regular greasing of the joint with a high‑quality EP grease will also extend the life of the bushing by reducing friction and flushing away contaminants. By following these practices, you can maximise the service life of your genuine XCMG bushing.
Every 319000330 bushing is accompanied by a test certificate that includes material composition, hardness readings, dimensional measurements, and surface finish verification. The production process is certified to ISO 9001:2015, with full traceability of raw materials and heat‑treatment records. Each bushing is 100% inspected using precision gauges and profilometers to ensure it meets the original equipment specifications.
The product carries CE marking and complies with the Machinery Directive 2006/42/EC. Its design has been validated through finite element analysis and physical endurance testing, confirming its ability to withstand the cyclic loads and impacts typical of heavy excavator operation. By choosing the OEM‑spec 319000330, you invest in a bushing that ensures the reliability and longevity of your XCMG excavator’s pivot joints, maintaining precision and performance throughout its operational life.
