1132600470 Excavator 4BG1 Engine Overflow Valve

Part number 1132600470 is the original relief valve (pressure regulating valve) core component designed specifically for hydraulic systems equipped with Isuzu 4BG1 series diesel engines. Mainly suitable for various mainstream medium-sized equipment using this engine, such as Hitachi ZX120-3, ZX130-3, and some Komatsu PC130-7 hydraulic excavators with 12-13 ton pilot or specific working oil circuits. As a key pressure control valve core from the original factory, its thread specifications, sealing structure, and valve body are perfectly matched

This product is a precision adjustment screw and valve core component for overflow valves, with a surface treatment process that brings good gloss and rust resistance. The shaft is processed with high-precision threads, which are used to screw into the valve body to achieve stepless pressure adjustment and locking. The clear hexagonal structure at the bottom is a standard design for rotating and adjusting with a matching wrench. Its core function is to precisely set and stabilize the working pressure of the oil circuit by rotating and changing the internal throttle opening, which is a key pressure regulating unit to ensure the safe and stable operation of the hydraulic system.

Installation and adjustment specifications: 1 Cleaning: Before installation, the threaded holes of the valve body and the component must be thoroughly cleaned with a lint free cloth and specialized cleaning agent to ensure that there are no particles. 2. Careful installation: Use your hands to smoothly screw the components into the valve body, ensuring that the threads are aligned and avoiding cross thread damage. 3. Professional debugging: Connect the hydraulic tester and have professional maintenance personnel use a suitable wrench to slowly rotate the hexagonal head for pressure adjustment until it reaches the system's specified value, and then reliably lock it. It is strictly prohibited to adjust arbitrarily.