803198382 XCMG GR2605 motor grader hose assembly

803198382 XCMG GR2605 motor grader hose assembly

The 803430637 hose assembly is a genuine hydraulic piping component for the XCMG GR2605 grader. It plays a crucial role in ensuring stable hydraulic oil delivery and high-pressure transmission, directly impacting the accuracy and response speed of core actuators such as the steering system, blade lifting cylinder, articulated steering cylinder, and hydraulic valve group. In harsh operating environments involving long-term heavy loads, high-frequency vibrations, and dust and mud erosion, such as highway construction, mining stripping, airport runway construction, and large-scale earthwork projects, it can stably withstand instantaneous impact pressures up to 60MPa, minimizing the risk of bursting, oil leaks, or bulging. This effectively reduces the probability of hydraulic system downtime for maintenance, ensuring continuous equipment operation efficiency. The hose features a four-layer reinforced composite structure. The inner tube is made of imported oil-resistant nitrile rubber (NBR), with an oil swelling rate of ≤3% and excellent chemical corrosion resistance, compatible with XCMG original L-HM 46/68 anti-wear hydraulic oil. The middle layer is a double-layer high-tensile-strength galvanized steel wire braided reinforcement layer with a breaking strength ≥1900MPa, providing strong pressure resistance and good deformation resistance, ensuring structural stability under high-pressure conditions. The outer rubber layer is made of wear-resistant and weather-resistant polyurethane (PU) material with a Shore hardness of 68HA, resisting UV aging and sand and gravel abrasion. After 5000 hours of outdoor aging testing, it showed no cracking or fading, significantly extending its service life. The connector is made of 45# steel precision forging and then subjected to phosphate and electrophoresis double anti-corrosion treatment. The corrosion resistance level reaches the GB/T 10125 720-hour salt spray test standard. With the original factory customized O-ring (made of fluororubber FKM), the sealing performance reaches the IP67 protection level. It is perfectly compatible with the original vehicle interface specifications and can directly replace the aging and damaged original vehicle hoses.

List of Compatible Hydraulic Components

Shovel Lifting Cylinder (Model 803089855)
Shovel Swing Cylinder (Model 804000940)
Right Articulated Steering Cylinder (Model 803077608)
Front Wheel Tilt Cylinder (Model 803090598)
Hydraulic Pump Outlet Pipeline
Main Control Valve Assembly Connection Pipeline
Brake Hydraulic Circuit

Maintenance Recommendations

Daily Inspection: Weekly check hoses for wear, bulges, cracks, and leaks at joints. Replace any hoses immediately if any abnormalities are found to prevent failure under high pressure.
Cleaning and Maintenance: Monthly flush hose surfaces with a high-pressure water gun (pressure ≤ 0.8MPa) to remove dust and oil, preventing long-term adhesion of corrosive substances.
Replacement Cycle: It is recommended to replace hoses every 2000 hours or 1 year under normal operating conditions, and every 1000 hours or 6 months under harsh operating conditions (high dust, high-frequency vibration). Storage Requirements: Uninstalled hoses should be stored in a dry, ventilated, and dark environment, avoiding heavy pressure and twisting. The storage temperature should be controlled between -10℃ and 30℃. Keep away from oil and chemicals. Precautions: Do not use the hose to drag equipment or carry heavy objects. Avoid direct contact between the hose and sharp parts; if necessary, install a wear-resistant protective sleeve.

Core Parameters

Part Model: 803430637
Product Name: Hose Assembly
Applicable Model: XCMG GR2605 Motor Grader
Application: Hydraulic system oil circuit transportation, high-pressure transmission
Structure: Four-layer reinforced composite structure (NBR inner tube + double-layer steel wire braid + PU outer rubber)
Rated Working Pressure: 40MPa
Instantaneous Impact Pressure: 60MPa
Operating Temperature Range: -40℃ to 120℃
Hose Inner Diameter: 16mm
Standard Length: 800mm (Customizable according to original factory requirements)
Features: High-pressure impact resistance, leak-proof sealing, wear-resistant and weather-resistant, original factory precise fit, corrosion-resistant
Applicable Working Conditions: Heavy-duty leveling environments such as highways, mines, airports, earthmoving, etc.
Quality Guarantee: Genuine original product, 6-month warranty (excluding human-caused damage)

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