4234782 Original Excavator Screw Plug for Hitachi ZX200

The genuine screw plug produced by Hitachi Japan with part number 4234782. This directly indicates its core application: the support chain (rail link) system used for crawler excavators. On models such as ZX200, this plug is commonly used to seal process holes, inspection holes, or oil/exhaust holes on travel motors, tensioning cylinders, or chain rail lubrication pipelines. Its universal model is this part number, designed specifically for the Hitachi ZX200 series crawler excavator, and is compatible with models on the same platform with the same support chain system structure.

This product is a steel hexagonal plum blossom head screw plug with a silver gray head. The surface has been galvanized or treated with Dacromet, which has excellent rust and corrosion resistance and can adapt to harsh environments with muddy water on the chassis. The head adopts an internal hexagonal plum blossom (Torx) design, which requires the use of a special wrench for disassembly to prevent slipping and facilitate operation in narrow spaces. The lower part is a precision machined threaded rod. Its core function is to reliably block threaded holes on hydraulic or lubricating oil circuits, form pressure seals inside the system, prevent oil leakage, and block external pollutants.

Inspection cycle: Every 250 working hours, visually inspect each screw plug for oil stains or rust when inspecting the chassis. Replacement timing: This plug is a reusable component, but if thread damage, head twisting (slipping), or deep scratches are found on the sealing area after disassembly, it must be replaced. Caution: It is strictly prohibited to remove the plug when the system is under pressure; When storing, it is necessary to keep the packaging intact, rust proof and anti-collision.