962002 Original Excavator Hydraulic Pump Circlip for ZX200 ZX240 ZX270

Part number 962002 is a key fixing component used inside the hydraulic pump of Hitachi's original excavator - a retaining ring (also known as a snap ring or retaining ring). According to the universal design of Hitachi hydraulic pumps, this collar is mainly suitable for various variable displacement piston pumps (such as HPV102, HPV118, etc.) installed on Hitachi ZX series (such as ZX200-3, ZX210-3, ZX240-3, ZX330-3, etc.) and EX series (such as EX200-5, EX300-5, etc.) excavators. It is usually used inside hydraulic pumps to fix rotating components such as bearings, gears, and shaft sleeves to prevent axial displacement. The original part number is 962002, which must be used as the reference for verification during procurement.

The retaining ring is the core positioning component of the internal mechanical structure of the hydraulic pump. Its core function is to provide precise axial positioning and limiting for components such as bearings and gears, withstand the axial force generated by rotating parts, ensure that the entire transmission system maintains a stable relative position under high-speed and high-pressure conditions, and prevent abnormal wear, noise, and even pump body damage caused by axial movement. As an original component, it is usually made of high-quality high carbon spring steel (such as SUP9 or similar materials) that is precision stamped, quenched and tempered, and has extremely high elasticity, fatigue strength, and dimensional accuracy.

The maintenance core of this card ring lies in regular inspection, standardized disassembly and preventive replacement. Inspection timing: It is recommended to perform regular maintenance on the hydraulic pump every 2000-3000 hours of operation, or to focus on inspecting all retaining rings during disassembly and maintenance when the pump produces abnormal noise or unstable pressure. Inspection content: Carefully inspect the collar for visible cracks, plastic deformation, loss of elasticity (abnormal increase in opening gap), or severe wear. Dismantling specifications: Special card spring pliers (inner or outer card) with matching dimensions must be used for dismantling. It is strictly prohibited to use tools such as screwdrivers and pry bars to forcefully pry, in order to avoid damaging the card ring groove or causing the card ring to collapse and injure people.