803421761 XCMG GR2605 motor grader hose assembly

803421761 XCMG GR2605 motor grader hose assembly

The XCMG GR2605 motor grader’s 803421761 hose assembly is a core high-pressure transmission line in the hydraulic system. It is pressure-resistant, impact-resistant, leak-proof, wear-resistant, and weather-resistant, specifically designed for heavy-duty and complex working conditions. It features precise original factory fitting and convenient installation and maintenance.

The 803421761 hose assembly is a custom-made hydraulic pipeline component for the XCMG GR2605 motor grader, playing a crucial role in hydraulic oil delivery and pressure transmission, ensuring precise hydraulic response of the steering system and working devices (cylinders, valve assemblies, etc.). In harsh operating environments such as highways, mines, airports, and earthmoving projects, characterized by long-term heavy loads, high-frequency vibration, and high levels of dust and mud, it can stably withstand high-pressure impacts, is not prone to bursting or oil leakage, effectively reducing the risk of hydraulic system failure and ensuring continuous equipment operation. The hose features a multi-layered reinforced composite structure. The inner tube is made of oil-resistant synthetic rubber, resistant to swelling and corrosion; the middle layer is reinforced with high-tensile steel wire braid, providing strong pressure resistance and deformation resistance; the outer rubber layer uses wear-resistant and weather-resistant materials, resisting UV rays and sand abrasion, extending service life. The connectors use original factory standard precision crimping technology, ensuring a secure and tight connection with excellent sealing performance. They are compatible with original vehicle interface specifications and can directly replace aged or damaged original vehicle hoses.

Installation Steps (Simplified Practical Version)

Preparation: Stop the machine and turn off the hydraulic system power. Release residual pressure in the hydraulic lines (slowly loosen the pressure relief valve, and close it after the pressure is completely released); prepare an appropriate wrench, sealing rings (original parts are pre-installed; spare parts can be prepared separately), a cleaning cloth, and rust inhibitor. Removing the old hose: Wipe both ends and connections of the old hose with a clean cloth to remove dust and oil. Loosen the nuts on both ends of the hose counterclockwise with a wrench and gently remove the old hose (avoid pulling or tugging to prevent damage to the threads). Check the connector surface for rust and scratches; if necessary, lightly sand with fine sandpaper and apply rust inhibitor. Cleaning the connections: Thoroughly wipe the hydraulic system connectors, valve assembly connections, and cylinder connections with a clean cloth to ensure no iron filings, dust, or oil residue remains, preventing impurities from entering the hydraulic system. Installing the new hose: Take out the new 803421761 hose, confirming that the hose routing matches the original vehicle layout (no twisting or hard bends), align the connectors at both ends, and insert it smoothly. Slowly tighten the connector nuts clockwise with a wrench, controlling the tightening torque to 25-30 N·m (avoid overtightening to prevent damage to the threads or seals), ensuring the connector fits snugly against the sealing surface. Inspection and Debugging: After installation, visually inspect the hose layout for rationality, ensuring there is no interference, stretching, or hard kinks. Turn on the hydraulic system power and slowly increase the pressure to 50% of the working pressure, holding the pressure for 5 minutes. Check for leaks at the joints. Once there are no leaks, increase the pressure to the rated working pressure and operate the equipment to perform steering, cylinder extension, and other actions, confirming that the hose exhibits no abnormal vibration or noise. Fixing and Protection: Secure the hose to the original vehicle bracket using the original factory-fitted clamps to prevent friction with the machine body due to vibration during operation. For critical areas, additional wear-resistant protective sleeves can be applied to extend service life.

Core Parameters

Part Model: 803421761
Product Name: Hose Assembly
Applicable Model: XCMG GR2605 Motor Grader
Application: Hydraulic system oil circuit transportation, high-pressure transmission
Features: High-pressure impact resistance, leak-proof sealing, wear-resistant and weather-resistant, original factory precise fit
Applicable Working Conditions: Heavy-duty leveling environments such as highways, mines, airports, earthmoving, etc.
Installation Instructions: Strictly follow the original vehicle piping routing during installation; do not twist or bend; do not disassemble before complete depressurization to avoid hydraulic oil spray injury.

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