803392344 XCMG GR2605 motor grader hose assembly

803392344 XCMG GR2605 motor grader hose assembly

The XCMG GR2605 motor grader’s 803392344 hose assembly is a core transmission line in the high-pressure main circuit of the hydraulic system. It features a four-layer reinforced composite structure upgrade design, offering high pressure and impact resistance, long-lasting leak-proof sealing, wear resistance, and aging resistance. It is precisely factory-fitted, ensuring efficient and stable transmission under heavy-duty conditions.

The 803392344 hose assembly is a core component of the XCMG GR2605 motor grader’s original factory-specific hydraulic system. It is compatible with the machine’s high-pressure main hydraulic system, undertaking the core task of stable delivery and pressure transmission of high-pressure hydraulic oil. It directly affects the accuracy and response speed of key actuators such as the blade lifting main circuit, the right articulated steering main circuit, and the hydraulic pump outlet main circuit. In harsh working environments such as highway construction, mine stripping, airport runway construction, and large-scale earthwork projects, where there is long-term heavy load, high-frequency vibration, and erosion from dust and mud, it can stably withstand instantaneous impact pressure of up to 68MPa, and is not prone to failures such as bursting, oil leakage, aging and cracking. This effectively reduces the frequency of hydraulic system downtime for maintenance and ensures the continuous operation efficiency of the equipment. The hose features a four-layer reinforced composite structure upgrade design. The inner tube is made of imported oil-resistant nitrile rubber (NBR), with an oil swelling rate of ≤2.1% and excellent chemical corrosion resistance. It is compatible with XCMG original L-HM 46/68 anti-wear hydraulic oil and L-HS high-temperature hydraulic oil. The middle layer is a double-layer high-tensile-strength galvanized steel wire braided reinforcement layer, using an ultra-high density braiding process, with a breaking strength ≥2150MPa, providing more stable pressure resistance and better deformation resistance. The outer rubber layer is made of wear-resistant and weather-resistant special synthetic rubber material with a Shore hardness of 72HA, excellent flexibility, UV aging resistance, and outstanding resistance to sand and gravel abrasion. It showed no cracking or fading after 6500 hours of outdoor aging testing. The connector is precision forged from 40# steel and then treated with phosphate + galvanizing + electrophoresis triple anti-corrosion treatment. It is equipped with original factory customized fluororubber FKM sealing rings, achieving an IP66 protection level for sealing performance. It perfectly adapts to 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 Main Circuit (Compatible Cylinder Model 803077608)

Hydraulic Pump Outlet Main Circuit (Matching Original High-Pressure Hydraulic Pump)

Main Control Valve Assembly Input Circuit (Compatible GR2605 High-Pressure Valve Assembly)

Front Wheel Tilt Main Circuit (Compatible Cylinder Model 803090598)

High-Pressure Accumulator Main Circuit (Supports System Pressure Stability)

Brake Main Hydraulic Circuit (Compatible with Wet Brake Drive Axle)

Core Parameters

Part Model: 803392344
Product Name: Hose Assembly
Applicable Models: XCMG GR2605 Motor Grader
Application: High-pressure main circuit delivery and pressure transmission in hydraulic systems
Structure: Four-layer reinforced composite structure (imported NBR inner tube + Double-layer steel wire braid + special synthetic rubber outer layer
Rated working pressure: 48MPa
Instantaneous impact pressure: 68MPa
Working temperature range: -45℃ to 130℃
Hose inner diameter: 22mm
Standard length: 1350mm (customizable to original factory requirements)
Features: High-pressure adaptability, reinforced structure, wide temperature range and weather resistance, upgraded protection, original factory precise fit, long service life
Applicable working conditions: Heavy-duty flat ground operations such as highways, mines, airports, and earthmoving
Quality assurance: Original factory product, 18-month warranty (excluding human-caused damage)

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