803405777 XCMG GR2605 motor grader hose assembly

803405777 XCMG GR2605 motor grader hose assembly

The 803405777 hose assembly is a core component of the XCMG GR2605 grader’s original factory-designated hydraulic system. It is compatible with the machine’s high-pressure hydraulic system, undertaking the crucial task of stable hydraulic oil delivery and pressure transmission. It directly impacts the accuracy and response speed of key actuators such as the blade lifting main circuit, the right articulated steering auxiliary circuit, and the hydraulic valve group output branch lines. In harsh operating environments characterized by long-term heavy loads, high-frequency vibration, and dust and mud erosion, such as highway construction, mine stripping, airport runway construction, and large-scale earthwork projects, it can reliably withstand high-pressure impacts and is less prone to bursting, oil leakage, aging cracking, and other malfunctions. This effectively reduces the frequency of hydraulic system downtime for maintenance, ensuring continuous equipment operation efficiency. =

The hose features a three-layer reinforced composite structure with optimized design. The inner tube is made of high-quality oil-resistant nitrile rubber (NBR), with an oil swelling rate of ≤2.2% and excellent chemical corrosion resistance. It is compatible with XCMG original L-HM 46/68 anti-wear hydraulic oil and high-temperature hydraulic oil. The middle layer is a high-tensile-strength galvanized steel wire braided reinforcement layer, using a dense braiding process, with a breaking strength ≥2060MPa, stable pressure bearing capacity, and excellent deformation resistance. The outer rubber layer is made of wear-resistant and weather-resistant special synthetic rubber material with a Shore hardness of 70HA, excellent flexibility, UV aging resistance, and outstanding resistance to sand and gravel abrasion. It showed no cracking or fading after 6200 hours of outdoor aging testing. The connector is precision forged from 40# steel and then treated with phosphate and galvanizing for double anti-corrosion. It is equipped with original factory-customized fluororubber (FKM) sealing rings, achieving an IP66 protection level for sealing performance. It perfectly matches the original vehicle interface specifications and can directly replace aged or damaged original vehicle hoses.

List of Compatible Hydraulic Components

Shovel Lifting Main Circuit (Compatible Cylinder Model 803089855)
Right Articulated Steering Auxiliary Circuit (Compatible Cylinder Model 803077608)
Hydraulic Valve Assembly Output Branch Pipeline (Compatible with GR2605 High-Pressure Valve Assembly)
Side Push Cylinder Auxiliary Control Circuit (Compatible with GR2605 Dedicated Model)
Hydraulic Pump Outlet Auxiliary Branch Pipeline (Matching Original High-Pressure Hydraulic Pump)
High-Pressure Accumulator Auxiliary Connection Pipeline (Supports System Pressure Stability)
Brake Main Hydraulic Circuit Branch (Compatible with Wet Brake Drive Axle)

Core Parameters

Part Model: 803405777
Product Name: Hose Assembly
Applicable Models: XCMG GR2605 Motor Grader
Application: High-pressure oil transmission and pressure transfer in hydraulic systems
Structure: Three-layer reinforced composite structure (high-quality NBR inner tube + Dense steel wire braid + special synthetic rubber outer layer) Rated working pressure: 43MPa Instantaneous impact pressure: 63MPa Working temperature range: -45℃ to 128℃ Hose inner diameter: 19mm Standard length: 1110mm (customizable to original factory requirements) Features: Suitable for medium and high pressure applications, impact and fatigue resistant, long-lasting leak-proof seal, wear and weather resistant, precise original factory fit, excellent flexibility Applicable working conditions: Heavy-duty flat surface operations such as highways, mines, airports, and earthmoving.

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