SPARKLING 3333073 Gearbox – Reliable Excavator Gearbox for Heavy Duty

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.

   SPARKLING MACHINERY NEW EC120D EC140B EC140C EC140D EC140E 14524582 Relief Valve is a dedicated hydraulic safety component for VOLVO EC120D, EC140B, EC140C, EC140D, and EC140E crawler excavators (mid-sized equipment for construction, municipal engineering, and light mining). As the core safety guard of the hydraulic system, it precisely limits maximum pressure to protect pumps, cylinders, and pipelines from overload damage during trench digging, material loading, and small-scale rock breaking.

   Meeting VOLVO OEM standards (part no. 14524582), it endures 30 MPa pressure, -25°C to 105°C temperature fluctuations, and continuous vibration. It resists oil contamination and wear, ensuring long-term reliability for the five VOLVO models, with strict testing guaranteeing seamless compatibility and safe operation.

   SPARKLING MACHINERY NEW R200W7 51N6-30420 (LINK(B) ASSY-RH) & 51N6-30410 (LINK(B) ASSY-LH) is a pair of dedicated structural linkage assemblies exclusively designed for R200W7 wheel excavators. As core components of the excavator’s working mechanism, the right-hand (RH) and left-hand (LH) link assemblies work in tandem to connect critical moving parts (boom, arm, and bucket)，enabling smooth, coordinated hydraulic-driven movements. This function is essential for supporting heavy-duty tasks like road construction, material loading, and site leveling—directly ensuring the excavator’s operational precision, load-bearing stability, and resistance to mechanical jams during prolonged high-intensity work.

   Engineered to match original equipment performance standards, both assemblies maintain strong structural integrity and wear resistance even under harsh conditions (continuous load stress, vibration, dust/debris exposure). They resist deformation and connection loosening, avoiding mechanical failures that could lead to unplanned downtime or costly component damage. Backed by strict performance verification, the pair guarantees long-term reliability to support uninterrupted operation of R200W7 wheel excavators.

   SPARKLING MACHINERY NEW EC200B EC200D EC210B 14541069 Swing Reducer is a premium China-made transmission component specifically engineered for EC200B, EC200D, and EC210B excavators. As a critical part of the swing system, it converts high-speed, low-torque input from the hydraulic motor into low-speed, high-torque output, enabling smooth and controlled rotation of the upper structure (boom, arm, and bucket) during precision positioning, material handling, and medium to heavy-duty operations.​
   Designed to original equipment standards, it maintains stable power transmission and efficient torque conversion even under continuous rotational stress and varying loads. With optimized gear meshing design for minimal friction, noise, and wear, it adapts seamlessly to harsh working environments, from construction sites to agricultural fields. Backed by strict quality verification, it guarantees consistent performance to support uninterrupted machinery operation.