4369148 Original Excavator Hydraulic Pump Oil Pipe for Hitachi ZX200

Part number 4369148 is the original hydraulic pump oil pipe officially designated by Hitachi. This component is a critical pipeline in the hydraulic system that connects the hydraulic pump to the oil tank, radiator, or control valve. Mainly designed for Hitachi ZX200 series medium-sized hydraulic excavators, especially mainstream models such as ZX200-3, ZX200-5A, ZX200-5B, etc. Meanwhile, based on the high versatility of Hitachi excavator platform, this oil pipe is highly likely to be suitable for models of the same tonnage class such as ZX210, ZX230, ZX240, ZX250, etc. As an original precision pipeline, its length, bending curvature, joint specifications, and pressure resistance level are precisely matched with the installation position and spatial layout of the corresponding hydraulic pump model

It is a metal hard tube (such as aluminum tube) or a high-pressure steel wire braided rubber hose with joints. Its core function is to establish a reliable and sealed oil channel between the hydraulic pump and other components of the system, to withstand the high pressure of the system and deliver hydraulic oil. As an original component, it possesses the following key attributes: 1 Reliable materials: the pipe body is made of high-strength materials, and the inner layer is oil resistant, and the outer layer is wear-resistant and anti-aging. 2. Precise joint: The two end joints are precision machined to ensure perfect fit and sealing with the pump port and valve body interface. 3. Performance standards: The design working pressure is usually much higher than the system rated pressure, with excellent pulse fatigue performance, temperature resistance (-40 ° C to+120 ° C), and anti vibration ability to adapt to the harsh working conditions of excavators.

Installation and inspection: Before installation, it is necessary to clean all joints and sealing surfaces, and check whether the new oil pipe is damaged during transportation. During installation, cross tighten the joints according to the prescribed sequence and torque (usually using a torque wrench) to avoid leakage or thread damage caused by uneven force. After installation, it is necessary to add hydraulic oil and start the engine. Run it at low idle for a period of time and check for any leaks at all connections. Daily maintenance: Check every 250 working hours or before work every day, focusing on observing whether the outer rubber of the oil pipe has cracks, bulges, wear (especially in contact with the frame), and whether there are oil stains at the joints.