0961214 Original Excavator Retaining Ring for ZX330

The original retaining ring part number 0961214 is a standard elastic retaining ring provided by Hitachi Construction Machinery for the ZX330 series 33 ton hydraulic excavator (including models ZX330-5G, ZX330-3, etc., with a total working weight of approximately 32-33 tons). This retaining ring is mainly used for axial positioning of rotating bearings, walking reducers, or working device pin shafts of equipment, to prevent axial movement of gears, bearings, and other components on the shaft or in the hole. Its universal model is usually directly labeled as 0961214, which belongs to C-type or E-type retaining rings (for shafts or holes), complies with JIS B 2804 or DIN 471/472 standards, and can be interchanged with MISUMI, OCHIAI and other brands of retaining rings of the same size specifications. However, to ensure positioning accuracy and anti loosening reliability, it is strongly recommended to use genuine original parts.

This product is an original elastic retaining ring made of high-strength spring steel (such as SUP9 or SK5), which has undergone quenching and tempering heat treatment, and the surface has been treated with phosphating or galvanizing for rust prevention. Its hardness is ≥ 44-52 HRC, elastic modulus is ≥ 200 GPa, and it has excellent fatigue resistance and impact resistance. The common specifications are an inner diameter of 12.7 mm, an outer diameter of 24 mm, and a thickness of 1.2 mm (specific dimensions subject to physical measurement). The working temperature range is -40 ℃ to+135 ℃, and the maximum axial bearing capacity is ≥ 2 kN. The retaining ring structure is designed with an open mouth, which is easy to disassemble and assemble using specialized snap pliers. It is suitable for harsh working conditions such as high vibration and high load of excavators, and can effectively prevent abnormal wear or loosening caused by component axial displacement.

Pre installation inspection: Confirm that the size of the buckle groove meets the standard (groove width 1.5-2.0 mm, groove depth 0.8-1.2 mm); Check the surface of the buckle for cracks, burrs, and deformation. Installation points: Use specialized snap ring pliers (inner pliers for shaft snap rings, outer pliers for hole snap rings) to vertically place the snap ring into the groove, ensuring that the rounded corner side of the snap ring faces the direction of force to avoid reverse installation and bite failure. Operation monitoring: Check the buckle for looseness, popping or wear every 500 working hours; If the device experiences abnormal axial movement or abnormal noise, the status of the retaining ring should be immediately checked. Fault diagnosis: If the buckle ring deforms or breaks early, it is often due to incorrect groove size or overload impact; If the buckle falls off, it is often due to improper installation or excessive groove wear. Replacement cycle: It is recommended to check and replace every 3000-5000 working hours or during major repairs; Use specialized disassembly tools when dismantling old retaining rings to avoid damaging the shaft neck or hole wall. Storage requirements: If the buckle is not installed, it should be moisture-proof and rust proof, and stored in the original packaging to avoid deformation due to compression. Always follow the installation specifications in the original maintenance manual and use genuine original components to ensure the long-term positioning accuracy and operational safety of the transmission system.