ranroswang@hksparkling.com 
+86 138 2341 8469
SPARKLING CAT 312D Swing Gearbox – Durable Excavator Part
The Caterpillar Swing Reducer (Part No. 333‑3073 / 3333073) is a premium swing gearbox designed to restore smooth and powerful 360° rotation in CAT excavators—compatible with 312D, 312DL, 312D2, 312E, 313D, 313D2, 314C, and 314E models.
It features hardened steel planetary gears, sealed bearings, and robust housing to handle heavy-duty rotational loads while preventing leaks and contamination . Available as genuine OEM or high-quality aftermarket units, this swing reducer ensures a direct-fit replacement and optimized machine performance.
The SPARKLING CAT 312D Swing Gearbox is a high-quality replacement part designed to fit perfectly with your Caterpillar 312D excavator. Manufactured by SPARKLING MACHINERY, a trusted name in excavator components since 2013, this swing gearbox delivers superior performance and durability to keep your machine running smoothly.
This swing gearbox is built with precision and stability in mind. It plays a crucial role in enabling smooth, controlled rotation of the excavator’s upper structure—ensuring efficient digging, lifting, and moving tasks. Thanks to advanced manufacturing processes and stringent quality control, the SPARKLING CAT 312D swing gearbox maintains reliable operation even in tough working conditions.
Choosing SPARKLING ensures you receive a product that combines longevity and cost-effectiveness. Its sturdy construction minimizes wear and tear, helping you avoid costly repairs and downtime. Plus, SPARKLING offers tailored solutions and expert technical support to meet your specific needs, reflecting our commitment to customer satisfaction.
Compatible not only with Caterpillar but also with other leading excavator brands like Komatsu, Hitachi, and Volvo, our swing gearboxes meet or exceed OEM standards. With SPARKLING MACHINERY, you benefit from competitive pricing without compromising quality.
In short, the SPARKLING CAT 312D Swing Gearbox is your reliable partner for maintaining excavator efficiency, extending service life, and optimizing operational costs. Trust SPARKLING to support your business with high-quality parts and continuous service.
Why Choose SPARKLING CAT 312D Swing Gearbox?
- Precise fit for Caterpillar 312D excavators
- Durable construction for long-term use
- Enhances machine stability and smooth motion
- Reduces maintenance frequency and costs
- Backed by expert support and customization options
- Compatible with major excavator brands
Invest in quality and reliability—choose SPARKLING for your excavator parts needs.
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Frequently Asked Questions
Can I get technical support for installing your parts?
Absolutely. We provide technical support and guidance for the installation and maintenance of our parts. Our team is available to assist you with any questions or concerns to ensure proper installation and optimal performance.
What is the lead time for receiving excavator parts?
Our typical lead time depends on the complexity and quantity of the order. For standard parts, delivery usually takes between 7 to 14 days. For custom orders, the lead time may vary, but we always strive to ensure timely delivery.
Do you offer customized parts?
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Yes, we offer tailored solutions to meet specific customer requirements. Whether you need custom dimensions or specialized features, we can design and produce parts that perfectly match your excavator’s needs.
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How do you ensure the quality of your parts?
We follow strict quality control procedures throughout the manufacturing process. Our parts are tested for durability, performance, and precision to ensure they meet industry standards and exceed customer expectations.
If you don’t find your answer, please E-mail us and we’ll be happy to help you out.
CATERPILLAR EXCAVATOR 312D L 312C 313D2 GC 313D2 333-3073 3333073 SWING REDUCER
The Caterpillar Swing Reducer (Part No. 333‑3073 / 3333073) is a premium swing gearbox designed to restore smooth and powerful 360° rotation in CAT excavators—compatible with 312D, 312DL, 312D2, 312E, 313D, 313D2, 314C, and 314E models.
It features hardened steel planetary gears, sealed bearings, and robust housing to handle heavy-duty rotational loads while preventing leaks and contamination . Available as genuine OEM or high-quality aftermarket units, this swing reducer ensures a direct-fit replacement and optimized machine performance.
VOLVO EXCAVATOR PARTS MADE IN CHINA NEW A25D EC140C EC240C EW40D 960254 O-RING SPARKLING MACHINERY
SPARKLING MACHINERY NEW A25D EC140C EC240C EW40D 960254 O-Ring is a dedicated sealing component exclusively engineered for VOLVO A25D articulated dump trucks, EC140C/EC240C excavators, and EW40D wheeled excavators—key equipment in construction, mining, and municipal infrastructure projects. As a critical part of the machinery’s hydraulic, fuel, and coolant systems, it creates tight, leakproof seals between mating components (e.g., hydraulic valve connections, fuel line joints, and coolant hoses). This function is essential for maintaining system pressure stability, preventing fluid leakage (hydraulic oil, fuel, coolant), and blocking dust or debris from entering internal mechanisms. It directly reduces the risk of system failures, avoids unplanned downtime, and eliminates costly repairs caused by leaks during high-intensity operations like heavy hauling, digging, or road maintenance.
Engineered to match VOLVO’s original equipment standards, the O-ring maintains reliable sealing performance even under harsh conditions: high pressure (up to 32 MPa), extreme temperature fluctuations (-30°C to 110°C), and continuous machinery vibration. It resists fluid aging and material degradation, ensuring long-lasting protection for VOLVO A25D/EC140C/EC240C/EW40D systems. Backed by strict performance verification, it guarantees consistent sealing support for these VOLVO models.
Hitachi HIGH-QUALITY EXCAVATOR PARTS MADE IN CHINA NEW ZX70-3 ZX75UR-3 ZX75US-3 4668185 RADIATOR SPARKLING MACHINERY
SPARKLING MACHINERY NEW ZX70-3 ZX75UR-3 ZX75US-3 4668185 Radiator is a core cooling component for 3 Hitachi excavator models (construction/mining use). It dissipates engine heat efficiently to maintain optimal operating temperatures, critical for heavy-load durability.
Meeting Hitachi OEM standards (4668185), it resists -30°C to 120°C temps, dust, and corrosion, ensuring seamless compatibility and long-term reliable thermal management performance.
R450LC7 R480C9MH R480LC9 R480LC9A R480LC9S R500LC7 R520LC9 31QB-10037 31QB-10030 HYDRAULIC MAIN PUMP ASSY
The 31QB-10037 / 31QB-10030 Hydraulic Main Pump Assembly is an essential component for delivering stable hydraulic power to your Hyundai crawler excavators. Built for high-performance, this pump guarantees powerful flow, high efficiency, and exceptional durability even under extreme excavation workloads.
🔧 Key Features:
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Original quality fitment for Hyundai’s large crawler excavators
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Ensures precise pressure regulation and smooth hydraulic operation
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Manufactured with high-grade wear-resistant components
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Rigorously tested for flow rate, pressure endurance, and temperature resilience
Contact us
Email: ranroswang@hksparkling.com
Wechat: +86 136 0901 0879
Skype: foreverlucia1
WhatsApp: +86 136 0901 0879
Address: No. 514-515, Hulin Road, Tianhe District, Guangzhou, China.
Sparkling Machinery Co.,Ltd
foreverlucia1
Whatsapp: +8613609010879