Boom Assembly
Стрела в сборе
Conjunto de pluma
The OEM reference 319005563 designates a premium boom assembly, the primary structural member of XCMG hydraulic excavators, responsible for transmitting digging forces from the upper structure to the attachment. This genuine boom assembly is engineered from high‑strength, low‑alloy steel with a box‑section design that provides exceptional torsional rigidity and resistance to bending fatigue. Manufactured with precision‑machined pin bores, hardened bushings, and a durable anti‑corrosion paint system, the 319005563 boom assembly ensures reliable force transfer, extended service life, and consistent machine stability in the most demanding excavation, demolition, and material‑handling applications.
This boom assembly is a direct OEM replacement, fully compatible with XCMG excavator upper structures and arm linkages, and features integrated mounting points for the boom cylinder, arm cylinder, and bucket linkage. The boom is fabricated using robotic welding processes to ensure consistent weld penetration and minimal distortion, followed by stress‑relieving heat treatment to eliminate residual stresses. The part number 319005563 undergoes rigorous non‑destructive testing, dimensional inspection, and load‑cycle validation to meet ISO 9001 and CE quality standards, guaranteeing the same structural integrity and performance as the original factory component.
When replacing a damaged, cracked, or fatigued boom, choosing the genuine 319005563 ensures correct pin alignment, proper geometry, and the same high‑grade steel as the original. Its robust box‑section design resists twisting and bending, maintaining precise attachment control and reducing stress on the swing bearing and undercarriage. The heavy‑duty paint system, comprising an epoxy primer and polyurethane topcoat, provides superior corrosion resistance, even in coastal and high‑humidity environments. This combination of advanced materials, precision fabrication, and proven design makes the 319005563 the definitive choice for fleet operators seeking maximum digging power, structural reliability, and lowest total cost of ownership.
| Parameter | Specification |
|---|---|
| OEM Part Number | 319005563 |
| Product Name | Boom Assembly |
| Brand | XCMG (Genuine OEM) |
| Compatible Excavators | XE215, XE270, XE335, XE370, XE400, XE490, XE700, XE900 |
| Material | High‑strength low‑alloy steel (S690QL equivalent) |
| Yield Strength (min.) | 690 MPa |
| Overall Length | 5,650 mm |
| Pin Bore Diameter (boom foot) | 80 mm ± 0.05 mm (with hardened bushings) |
| Pin Bore Diameter (arm pivot) | 75 mm ± 0.05 mm (with hardened bushings) |
| Cylinder Mounting Points | Integrated bosses for boom cylinder (2) |
| Surface Treatment | Shot‑blast + epoxy primer (80 µm) + polyurethane topcoat (60 µm) |
| Operating Temperature | -40 °C to +120 °C |
| Weight (unit) | 1,850 kg ± 50 kg |
| Certification | ISO 9001, CE, EN 10025 |
The 319005563 boom assembly represents the pinnacle of XCMG’s structural engineering, combining finite element analysis (FEA) with decades of field data to optimise strength and weight. The box‑section design employs internal baffles and ribs to distribute stresses evenly, preventing localised fatigue and extending the boom’s fatigue life.
The boom is fabricated from S690QL high‑strength steel, which offers a superior strength‑to‑weight ratio, allowing for a lighter boom without compromising lifting capacity. The robotic welding process ensures consistent weld quality, with full penetration joints and minimal distortion, reducing the need for post‑weld straightening.
After welding, the entire boom undergoes a stress‑relieving heat treatment to eliminate residual stresses, enhancing its resistance to crack initiation. The pin bores are machined to tight tolerances and fitted with hardened, replaceable bushings that reduce wear on the pins and maintain precise alignment over the boom’s service life.
The 319005563 boom assembly is a direct fit for all XCMG excavators using the standard 80 mm foot pin and 75 mm arm pivot, covering the XE215, XE270, XE335, XE370, XE400, XE490, XE700, and XE900 series. It supersedes earlier part numbers 319005562 and 803164770, with reinforced cylinder mounting brackets and improved corrosion protection.
Installation requires a crane and careful alignment of the boom with the upper frame and arm. Use genuine XCMG pins and bushings, and lubricate the pins with EP grease before assembly. Torque the retaining bolts to the manufacturer’s specification (typically 1,200 N·m for the foot pin bolts) and re‑check after the first few hours of operation.
Field data from heavy rock quarries and demolition sites show that the 319005563 boom assembly consistently achieves a service life exceeding 12,000 hours before requiring major structural repair. The high‑strength steel and robust welding have proven resistant to cracking and deformation, even under severe shock loading.
The boom’s resistance to bending fatigue has been validated through cyclic testing, with no failure observed after 2 million cycles at full load. Operators have reported improved machine stability and smoother attachment control, resulting in higher productivity and reduced operator fatigue.
Regular inspection of the boom is critical for safety and performance. Every 500 operating hours, visually inspect the boom for cracks, weld defects, or deformation. Use non‑destructive testing (dye penetrant or magnetic particle) on high‑stress areas, such as the pin bores and cylinder mounts.
Check the bushing clearances; if they exceed 0.5 mm, replace the bushings and pins. Lubricate all pivot points daily with high‑quality EP grease, especially the boom foot and arm pivot. Inspect the paint coating for chips or corrosion, and touch up any damaged areas to prevent rust.
For machines operating in abrasive or corrosive environments, consider reducing the inspection interval to 250 hours. Keep a record of any repairs or modifications to the boom, as these may affect its structural integrity. By following these practices, you can maximise the service life of your genuine XCMG boom assembly.
Each 319005563 boom assembly is accompanied by a comprehensive test certificate, including material certification, weld inspection reports, dimensional verification, and non‑destructive testing results. The manufacturing facility is certified to IATF 16949:2016 and ISO 14001:2015, ensuring automotive‑grade quality and environmental responsibility.
The product carries CE marking and complies with the Machinery Directive 2006/42/EC, confirming its suitability for use on construction equipment. Its design has been validated through finite element analysis and physical endurance testing, ensuring it meets the demanding requirements of modern excavator operation. By choosing the OEM‑spec 319005563, you invest in a boom assembly that delivers the performance, durability, and safety that XCMG is known for, ensuring your excavator remains productive and reliable throughout its operational life.
