The 803390381 Hose Assembly is a genuine XCMG high-pressure hydraulic line designed for motor grader steering systems, brake actuation, and implement control circuits. This precision-engineered hose assembly directly replaces worn, cracked, or leaking original lines on XCMG GR series graders (GR135, GR165, GR180, GR215, GR260, GR300, GR350). Manufactured with a synthetic rubber inner tube, two high-tensile steel wire braids, and an abrasion-resistant outer cover, the 803390381 delivers reliable fluid transfer at extreme pressures up to 28 MPa. The assembly includes factory-crimped swivel fittings with O-ring seals, ensuring leak-free performance under dynamic flexing and heavy vibration.
The 803390381 is commonly used as a steering cylinder supply line, brake release hose, or pilot line for the blade lift valve. Its compact design and optimized bend radius allow routing through tight chassis spaces without chafing or kinking. Each hose assembly is 100% pressure-tested and impulse-cycled to 1,000,000 cycles at 133% of rated working pressure. Choosing the genuine XCMG 803390381 guarantees perfect fitment, superior durability, and the same quality as the original equipment from the factory. Never compromise safety or productivity with generic substitutes.
Hydraulic hose failure is a leading cause of unplanned grader downtime. The 803390381 assembly resists ozone, UV, and extreme temperatures (-40°C to +121°C). Its non-permeable inner tube prevents fluid permeation, keeping the environment clean and preserving oil viscosity. Upgrade your grader’s reliability with the exact OEM replacement – order the XCMG 803390381 today.
| Parameter | Specification |
|---|---|
| OEM Number | 803390381 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Hydraulic Hose Assembly (Straight / 45° / 90° ends) |
| Hose Inner Diameter | 10 mm (3/8 inch) – SAE 100R2AT / ISO 1436 2SN |
| Reinforcement | Two high-tensile steel wire braids (2000 N/mm²) |
| Overall Length (End to End) | 1120 mm ± 5 mm (customer length available on request) |
| End Fittings Type | Female swivel 24° flare (DIN 2353) / ORFS |
| Thread Size | M16 × 1.5 / M18 × 1.5 (depends on application) |
| Maximum Working Pressure | 28 MPa (4,060 psi) |
| Burst Pressure | 112 MPa (16,240 psi) – 4:1 safety factor |
| Operating Temperature Range | -40°C to +121°C (-40°F to +250°F) |
| Inner Tube Material | Nitrile rubber (oil resistant, low permeation) |
| Cover Material | Black synthetic rubber (MSHA, ozone & abrasion resistant) |
| Minimum Bend Radius | 75 mm (dynamic flexing) |
| Impulse Cycle Test | 1,000,000 cycles @ 133% working pressure (SAE J343) |
| Standards Compliance | SAE J517, ISO 1436, DIN EN 853 2SN |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 803390218, 803390299, 803390345 |
The XCMG 803390381 Hose Assembly is essential for transmitting pressurized oil to critical grader functions: steering, brakes, blade lift, and circle rotation. A compromised hose can cause sudden loss of steering control, brake failure, or blade drift, creating safety hazards and costly delays. This OEM assembly ensures consistent flow without pressure drop, even under full-load ripping or steep bank sloping. The 803390381’s steel wire braid absorbs shock impulses from the hydraulic pump, extending the life of connected valves and cylinders.
On GR215 and GR260 graders, this hose assembly often connects the variable displacement pump to the load-sensing signal network. Its smooth bore minimizes turbulence, reducing oil heating by up to 10°C compared to worn lines. The outer cover resists abrasion from frame contact and exposure to diesel, grease, and road salts. Replacing a bulging or weeping hose with genuine 803390381 restores original flow rates, improving machine responsiveness and fuel efficiency.
Properly functioning hoses also prevent aeration and cavitation. The 803390381’s non-permeable inner tube eliminates micro-leaks that could allow air ingress, which leads to pump damage. XCMG engineers specifically selected the rubber compound to maintain flexibility down to -40°C, ensuring cold-weather starts without cracking. Trust the 803390381 to keep your grader productive in the harshest environments.
Every 803390381 Hose Assembly is produced in XCMG’s ISO 9001:2025 certified facility using automated spiral braiders and precision crimping presses. The steel wire is drawn to exact tensile strength and braided at a 54° angle to maximize pressure capacity while preserving flexibility. After braiding, the outer rubber is extruded and vulcanized in autoclaves with computer-controlled temperature profiles.
Each assembly undergoes 100% high-pressure proof testing at 42 MPa (150% of rated working pressure) with real-time leak detection. The crimped ferrule diameter is checked with laser micrometers; any deviation beyond ±0.1 mm is rejected. The 803390381 also passes impulse testing per SAE J343: 1 million cycles at 133% pressure without failure. A unique batch code is laser-etched on each hose for traceability back to raw materials.
XCMG’s quality control includes salt spray testing of fittings (over 500 hours), cold flexibility tests at -40°C, and ozone resistance per ISO 1431. Counterfeit hoses rarely meet these standards and often fail within months. Choose genuine 803390381 to benefit from XCMG’s rigorous validation and 12-month warranty against manufacturing defects.
Replacing a failed hydraulic hose begins with relieving system pressure: shut off engine and cycle all controls several times. Clean the area around both fittings to prevent contamination. Disconnect the old hose using proper wrenches and capture any spilled oil. Compare the new 803390381 assembly with the old one – verify length, end fitting angles, and thread size. Always install new O-rings supplied with the genuine assembly.
Route the new hose exactly as the original, avoiding sharp edges, exhaust manifolds, and moving linkages. Secure with original clamps or nylon ties to prevent chafing. Hand-tighten the fittings, then torque to specification: 35-40 Nm for M16 flare fittings, 45-50 Nm for M18 ORFS. After installation, refill hydraulic oil if necessary, start the engine, and check for leaks at idle and under full steering lock.
Always replace hoses in pairs on critical circuits (both steering cylinders) for balanced performance. After installation, wipe the hose and inspect for twist – a twisted hose can reduce service life by 70%. XCMG recommends full hose replacement every 4,000 hours or five years. Keep spare 803390381 assemblies in your parts inventory to avoid extended downtime. Never reuse old fittings or attempt to repair a damaged hose – always replace with genuine XCMG.
Aftermarket hoses often use low-grade rubber that hardens and cracks within months, leading to sudden burst. Many generic assemblies have incorrect ferrule crimping dimensions, causing fitting blow-offs. The genuine 803390381 features XCMG-specified crimp geometry that matches the original port exactly, eliminating leak paths. Aftermarket hoses also frequently have smaller inner diameters, restricting flow and slowing implement response.
Counterfeit hoses rarely pass flame resistance or impulse tests. They can degrade internally, sending rubber particles into valves and causing spool sticking – expensive repairs that exceed the cost of a genuine hose many times over. XCMG’s 803390381 includes a one-year warranty against defects, while aftermarket units offer no coverage. Protect your investment with original XCMG parts.
Additionally, genuine XCMG hoses deliver longer service life in extreme conditions: -40°C cold starts and +121°C continuous operation. The outer cover is MSHA rated for flame resistance, essential for underground or fire-risk environments. For fleet operators, using OEM 803390381 reduces total cost of ownership by minimizing unplanned breakdowns and hydraulic component wear. Don’t risk safety – insist on XCMG genuine.
Watch for these symptoms indicating the need to replace the 803390381 hose assembly: visible cracks or blisters on the rubber cover, leaking fluid at fittings, a soft or spongy feel when squeezing the hose, and hydraulic oil puddles under the grader. Also, if steering feels heavy or the blade drifts down when parked, internal hose delamination may be restricting flow.
During daily inspections, run a dry cloth along the hose to detect seepage. Check for chafing marks where the hose contacts frame brackets. Replace any hose that shows exposed steel braid or deep cuts. XCMG also recommends proactively replacing all hoses on high-hour machines before they fail – the cost of a single hose is negligible compared to a hydraulic pump running dry.
Implement a 2,000-hour hose rotation program for critical circuits: steering, brake, and blade lift. This reduces unexpected failures by 60% based on XCMG fleet data. Always clean hose ends before reconnection to prevent dirt ingress. Store spare 803390381 assemblies in a cool, dry area away from ozone sources (electric motors, welding equipment). A well-maintained hydraulic system keeps your grader on the job.
The 803390381 Hose Assembly is stocked in XCMG regional distribution centers: North America (Houston, TX), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard air freight delivery within 2-5 business days to most countries. Emergency courier (DHL/FedEx) is available for 1-2 day delivery. Bulk orders (20+ units) can be shipped via sea freight with volume discounts.
Each hose assembly is individually sealed in anti-static plastic and packed in reinforced cartons to prevent deformation. For large fleet maintenance contracts, XCMG offers consignment inventory – parts are stored on-site and billed as used. This eliminates downtime from ordering delays. Contact your regional XCMG parts dealer to set up automatic replenishment for 803390381 hoses.
Don’t let a ruptured hose stop your grader during critical grading jobs. The genuine XCMG 803390381 delivers reliability, safety, and peace of mind. Order now and experience the performance that keeps XCMG motor graders working around the world. With precise fitment, superior materials, and OEM quality, the 803390381 is the only hose assembly you should trust for your equipment.
Upgrade your motor grader’s hydraulic system with the XCMG 803390381 Hose Assembly – engineered for strength, flexibility, and long service life. Each assembly is backed by XCMG’s global warranty and support network. Keep your grader productive, safe, and ready for any job. Make the smart choice: genuine XCMG parts only.
