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CAT330
CAT330-6
CAT330-5
CAT330-2
CAT330-3
CAT330-4
CAT330
CAT330-6
CAT330-5
CAT330-2
CAT330-3
CAT330-4

Caterpillar Excavator Middle Arm Cylinder Assembly for CAT 330

Place of Origin China/USA
Brand Name LIRACE/Caterpillar
Model Number CAT 330
Minimum Order Quantity 1 PCS
Price Negotiable price
Packaging Details Wooden case or as required
Delivery Time 5-8 Weekdays
Payment Terms Western Union,T/T
Supply Ability 300pcs /Month
CAT330-5
Upgrade your earthmoving machinery with the premium Caterpillar Excavator Middle Arm Stick Cylinder Assembly, expertly engineered for CAT 330 series models including the 330D, 330F, and 330 GC. This high-performance hydraulic cylinder guarantees exceptional digging force and longevity in demanding construction environments. Built to precise OEM specifications, it features a standard 150 mm bore and a 1646 mm stroke length, operating seamlessly under high pressures of up to 35,000 kPa. Weighing approximately 350 kg, its heavy-duty steel construction and advanced sealing systems ensure ultimate resistance to wear and physical stress. Compatible with common replacement part numbers like 191-5551 and 116-3649, this stick cylinder assembly provides a perfect, leak-free fit. Maximize your Caterpillar equipment's operational efficiency, minimize costly downtime, and restore peak hydraulic performance with this reliable, industry-leading excavator component.
CAT330-4
To ensure peak performance and extend the lifespan of your Caterpillar Excavator Middle Arm Cylinder Assembly for the CAT 330, following a strict daily maintenance guide is essential. Start your maintenance process by conducting visual inspections of the chrome cylinder rod for any scratches, dents, or hydraulic fluid leaks, as these defects can severely damage internal seals and cause pressure loss. Regularly clean the cylinder surface to prevent dirt and debris buildup from entering the hydraulic system. As part of your routine maintenance schedule, always grease the pivot pins and bushings to reduce friction and prevent premature wear during heavy-duty digging operations. Furthermore, ensure hydraulic oil and filters are replaced according to OEM intervals to maintain fluid purity. By adhering to these proactive maintenance suggestions and utilizing high-quality replacement seal kits when rebuilding, you can maximize the reliability of your CAT 330 stick cylinder and minimize costly machine downtime.
CAT330-3
Ensure a seamless and safe installation of your Caterpillar CAT 330 excavator middle arm cylinder assembly by following these critical procedures and precautions. Begin by parking your heavy-duty machinery on level ground, turning off the engine, and safely releasing all hydraulic pressure to prevent accidents. Utilizing proper lifting equipment, carefully align the heavy stick cylinder with the mounting brackets, ensuring the pin bores are thoroughly cleaned and free of debris. Insert the well-greased pivot pins and firmly secure all retaining bolts to exact OEM torque specifications. When reconnecting the hydraulic hoses, verify that the O-rings are perfectly seated to prevent fluid leaks and internal contamination. As a crucial final precaution, always bleed the trapped air from the hydraulic system by slowly cycling the middle arm cylinder several times without a load before resuming full-scale excavation operations.
Brand USA Brand Name LIRACE/CAT
Model CAT 330 Product Name Middle Arm Cylinder Assembly
Part Number 565-0157 ApplicableBrand CAT
Warranty Period 6-12 months Condition NEW
Standard or Non-standard Standard Type Guarantee We will inspect the products and send detailed pictures to the buyer for confirmation.
Applicable Industries Mechanical Repair Shops, Retail, Construction, Energy, Mining Shipping Method Sea freight, Air freight, DHL/FEDEX/TNT/EMS
PRODUCTS

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In November 2024, the elite team of Guangzhou Herui (XINYA) Construction Machinery Co., Ltd. made a vibrant appearance at Bauma CHINA 2024 (the 12th International Trade Fair for Construction Machinery, Building Material Machines, Mining Machines and Construction Vehicles) held in Shanghai, capturing precious group photos at the fair’s iconic location (see attached photo). As a leading supplier focused on high-quality excavator components, particularly in the hydraulic transmission field, the company fully showcased its core products: Excavator Hydraulic Pumps, Swing Motors, and Travel Motors, alongside a comprehensive range of quality accessories. At the exhibition, the company team engaged proactively in deep exchanges with global business partners, answering technical inquiries and sharing industry solutions. This appearance not only showcased the company’s professional expertise and brand image in the hydraulic market but also successfully consolidated and expanded its domestic and international market channels. Moving forward, Guangzhou Xinya (Herui) will continue to uphold the philosophy of “Quality First, Service Best,” providing superior hydraulic solutions to customers worldwide.
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Herui (XINYA) Machinery Participated in bauma CHINA 2024 to Expand Global Excavator Parts Business

In November 2024,Herui (XINYA) Machinery participated in bauma CHINA 2024, one of the world’s leading trade fairs for construction machinery, held at the Shanghai New International Expo Centre (SNIEC). As a professional excavator parts supplier from China,Herui (XINYA) Machinery showcased a wide range of high-quality excavator spare parts, including hydraulic pumps, travel motors, swing drives, gearbox assemblies, and engine parts. Our products are widely used for Caterpillar, Komatsu, Hitachi, Volvo, Hyundai, and other major excavator brands. During the exhibition, our team welcomed customers and business partners from Europe, Russia, the Middle East, and Southeast Asia. We had productive discussions on product quality, aftermarket support, fast delivery, and long-term cooperation opportunities. bauma CHINA 2024 provided an excellent platform for Herui (XINYA) Machinery to strengthen global partnerships and demonstrate our reliable supply capabilities in the construction machinery aftermarket industry. Herui (XINYA) Machinery remains committed to providing competitive prices, professional service, and reliable excavator parts solutions to customers worldwide.
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For Herui (XINYA) Machinery, CTT Expo 2025 was more than a trade show. It was an important opportunity to meet customers face to face, understand the real needs of the Russian construction machinery market, and build stronger business relationships. During the exhibition, our team communicated with customers from Russia and surrounding markets about excavator maintenance, spare parts replacement, delivery stability and long-term supply cooperation. Many customers showed strong interest in our excavator spare parts, including hydraulic pumps, filters, engine parts, seal kits, final drives, travel motors and swing motors. As a China-based excavator parts supplier, Herui (XINYA) Machinery understands that overseas customers need more than products. They need reliable quality, accurate part matching, fast response and a supplier they can trust. The meeting at CTT Expo 2025 helped us better understand local market demand and customer expectations. Herui (XINYA) Machinery will continue to support global dealers, repair workshops and construction equipment owners with dependable excavator parts solutions and professional aftermarket service.
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2026 Q1 Excavator Export & Accessory Demand Surges

Amid global infrastructure recovery and rising key mineral demand, Q1 2026 global excavator exports rose 36.1% YoY, accounting for 46% of total sales. Authoritative data shows March exports increased 32% YoY, driving 41.3% YoY growth in core accessory demand. Hydraulic pumps, swing components, and travel components accounted for 38%, 29%, and 22% respectively. Regional demand differs significantly: African excavator exports rose 77% YoY, with 58% growth in core accessories driven by mineral projects. Oceania exports grew 50.6% (focusing on infrastructure), while 65% of European purchases are high-end durable accessories. MEA region’s CAGR exceeds 9%, with 72% demand for high-temperature and dust-proof hydraulic and travel components. We focus on the global construction machinery accessory market, specializing in hydraulic pumps, swing and travel components. Our products fit mainstream excavator models, support customization, and offer factory-direct supply with cost-effectiveness and professional after-sales/customs services for global buyers.
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What We Do

Services we Offer

service1

What if there are quality problems with the purchased products?

Please rest assured completely. We implement strict quality control throughout the whole production process. From raw material incoming inspection to finished product delivery, all items undergo multiple rounds of rigorous technical inspection and performance testing, to fully ensure every delivered product meets 100% qualified standards. All unqualified products detected during inspection will be disposed of by centralized destruction, to firmly prevent defective goods from entering the market. Meanwhile, we provide an extended warranty period of 6 to 12 months for all products. Within the warranty period, if any non-artificial quality failure occurs, please contact us promptly. Our professional technical team will respond at the earliest time and offer targeted solutions based on actual conditions. In addition, we deliver all-round technical support to safeguard your after-sales operation. Always taking customer satisfaction as the core principle, we are committed to establishing long-term and stable cooperative partnerships with global clients.
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What happens if the delivered item is unsuitable for my needs?

Please rest assured. To ensure that the products you receive fully meet your needs, we will conduct multiple rounds of demand confirmation with you before shipment, fundamentally avoiding the problem of wrong or missing delivery. To further ensure accuracy, we will first conduct precise query and verification through the product part number you provide to ensure that the product model and specifications are completely matched. If you do not have an accurate part number temporarily, we will arrange professional technicians to check and confirm one by one according to the clear product pictures and corresponding construction machinery models you provide, and communicate and synchronize with you throughout the process until confirmed correct before arranging shipment, to fully ensure that you receive the products you need and avoid unnecessary troubles.
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What professional shipping and delivery standards can we provide you?

Within our international trade operations, we prioritize a high-efficiency supply chain and a transparent logistics framework. To ensure the accuracy of every shipment, a standardized PDI (Pre-Delivery Inspection) system is strictly enforced. Before the final sealing of containers, our QC specialists conduct a thorough re-examination. We provide clients with high-resolution photos of the actual items, packaging details, and the Packing List for Visual Confirmation, ensuring 100% compliance with order specifications and delivery transparency. We support versatile Incoterms, including EXW and FOB. To meet diverse delivery timelines and cost constraints, we offer a multi-modal logistics matrix ranging from Ocean Freight and Air Freight to global couriers (DHL/FEDEX/TNT/EMS). We guarantee full professional documentation support for every shipment to ensure a safe, timely, and compliant arrival at the port of destination.
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We are a global one-stop supplier of excavator spare parts. We maintain full control over the entire process from R&D and manufacturing to sales, delivering top-quality excavator components to you.

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