The genuine XCMG 803419851 Hose Assembly is a high‑pressure hydraulic line for motor grader steering, brake, and implement circuits.
This OEM 803419851 hose assembly features a synthetic rubber inner tube, two steel wire braids, and an abrasion‑resistant cover.
It is fitted with permanent, one‑piece forged steel fittings (JIC 37° flare or ORFS) for leak‑free connections.
Engineered for XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders, this hose withstands 28 MPa (4,000 psi).
The hose assembly is a direct replacement for worn, cracked, or leaking hoses in circle drive, blade lift, articulation, and brake circuits.
It delivers pressurized fluid from the pump to cylinders, motors, and valves. A leaking hose causes loss of control and oil spills.
Replacing a damaged hose with genuine XCMG 803419851 restores full hydraulic power and eliminates safety hazards.
This assembly is also used in differential lock systems, transmission cooling, and parking brake release lines.
XCMG 803419851 guarantees OE fit, correct bend radius, and long service life under extreme temperature cycles and vibration.
| Parameter | Specification |
|---|---|
| OEM Number | 803419851 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Hydraulic Hose Assembly / Pressure Line |
| Hose I.D. | 12.7 mm (½ inch) |
| Overall Length (End to End) | 1250 mm ±5 mm |
| Reinforcement Layers | 2 steel wire braids (high‑tensile) |
| Max Working Pressure | 28 MPa (4000 psi) |
| Burst Pressure (min) | 112 MPa (16,000 psi) |
| Min Bend Radius | 120 mm (installed) |
| Fitting Type (Port 1) | JIC 37° flare, male, ¾-16 UNF |
| Fitting Type (Port 2) | ORFS, male, M18×1.5 metric |
| Inner Tube Material | Synthetic rubber (oil‑resistant NBR) |
| Cover Material | Abrasion/weather‑resistant synthetic rubber |
| Temperature Range | -40°C to +121°C (-40°F to +250°F) |
| Fluid Compatibility | Mineral oils, synthetic fluids, water‑glycol |
| Standards | SAE 100R2AT, ISO 1436‑1 Type 2SN |
| Impulse Test | 200,000 cycles at 133% working pressure |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 |
| Superseded Part Numbers | 803419811, 803419830, 803419844 |
The 803419851 hose assembly delivers pressurized oil from the main pump to steering cylinder, brake valve, and implement manifold.
Without this hose, none of the grader’s hydraulic functions operate. A leaking hose reduces system pressure, causing slow response.
A burst hose can spray hot oil onto hot engine surfaces, creating a serious fire hazard and immediate loss of function.
Replacing a worn hose with genuine XCMG 803419851 restores full flow, eliminates leaks, and maintains safety integrity.
This hose is also used in the circle drive motor supply line and differential lock actuator circuit.
Proper hose condition is essential for precise blade positioning, traction control, and operator safety.
Each 803419851 hose is made using a mandrel‑wrapped process with two layers of counter‑rotating steel wire braid.
This construction provides high burst strength while maintaining necessary flexibility for routing around machine components.
The inner tube is extruded from oil‑resistant NBR compound, then vulcanized to the reinforcement.
The outer cover is compounded for abrasion, ozone, and UV resistance, extending service life in outdoor conditions.
Fittings are crimped using computer‑controlled machines that apply precise compression for leak‑free connections.
Each assembly is proof‑tested at 1.5 times working pressure (42 MPa) for 60 seconds before shipping.
XCMG impulse‑tests sample assemblies for 200,000 cycles to validate fatigue life. Only approved hoses receive the XCMG brand.
To replace a damaged hose, relieve all hydraulic pressure by cycling controls with engine off. Use a container to catch oil.
Remove the old hose using a backup wrench on the fitting to avoid twisting the port. Inspect threads and sealing faces.
Hand‑start the new 803419851 hose fittings to avoid cross‑threading, then torque to specification (35‑40 Nm for JIC).
Route the hose without sharp bends or contact with moving parts. Use protective sleeving where necessary.
Start the engine and check for leaks while cycling the hydraulic circuit. Retighten if needed.
Always replace a burst hose – do not attempt to repair with tape or glue. Keep a spare in your parts inventory.
Visible fluid seepage, cracks or blistering on the rubber cover, or wire reinforcement showing through indicate replacement needed.
Also replace if the hose feels soft or spongy, fittings are corroded, or the hose has been kinked or crushed.
Do not delay replacement – a catastrophic hose failure can cause oil loss, machine shutdown, and safety hazards.
Inspect all hydraulic hoses every 500 operating hours. Look for chafing, cracking, bulging, or cover damage.
Typical replacement interval for 803419851 is 4,000‑5,000 hours under normal grading conditions.
In high‑vibration or high‑temperature environments (engine compartment), replace every 2,000 hours.
Use protective spiral wrap where hoses may rub against metal edges. Keep hoses clean to prevent cover degradation.
When replacing one hose, always consider replacing adjacent hoses of similar age and wear condition.
Genuine XCMG 803419851 hose assemblies carry a 12‑month warranty against manufacturing defects.
Stocked in regional warehouses: Houston, Rotterdam, Dubai, and Shanghai for fast dispatch worldwide.
Standard air freight delivers within 3‑7 business days. Emergency 24‑48 hour shipping available for critical repairs.
Bulk orders (10+ assemblies) receive volume discounts and sea freight options for large fleets.
Aftermarket hoses often use low‑grade rubber or incorrect crimping, leading to premature leaks and safety risks.
Genuine XCMG 803419851 ensures proper materials, correct length, and factory‑certified crimping for reliability.
Don’t take chances with hydraulic hose failures – they can lead to loss of steering or brakes.
Keep spares in your parts inventory and replace at the first sign of leakage or cover damage.
Upgrade your motor grader’s hydraulic reliability with XCMG genuine hose assemblies – order the 803419851 Hose Assembly now.
Experience leak‑free operation and full hydraulic power for thousands of productive hours in the toughest conditions.
