The 804574009 Hose Assembly is a genuine OEM high‑pressure hydraulic hose manufactured by XCMG for motor grader steering circuits, blade lift systems, brake lines, and hydraulic fan drives. This precision‑assembled hose consists of a flexible inner tube (oil‑resistant nitrile rubber), a high‑tensile steel wire braid reinforcement, and a weather‑resistant synthetic rubber cover. Designed for GR series motor graders (GR135, GR165, GR180, GR2003, GR215, GR300, GR350), the 804574009 hose assembly withstands working pressures up to 25 MPa (250 bar) and extreme impulse spikes, ensuring reliable hydraulic power transmission in demanding grading environments.
The 804574009 hose assembly comes with pre‑installed permanent crimped fittings (straight or 45° elbows) factory‑oriented to match the original equipment layout on XCMG graders. This complete assembly eliminates the need for field‑cutting, fitting assembly, or leak‑prone clamp connections, reducing installation time and improving reliability. The hose is temperature‑rated from -40°C to +100°C and is resistant to abrasion, ozone, and UV exposure, making it ideal for open‑air mining, highway construction, and agricultural grading applications.
A burst or leaking hydraulic hose can cause sudden loss of steering or blade control, leading to dangerous machine behaviour and costly downtime. Replacing a worn, cracked, or swollen hose with the genuine XCMG 804574009 assembly restores full hydraulic integrity, eliminates leaks, and ensures factory‑specified flow capacity. Always trust XCMG original hose assemblies for safety, performance, and fitment accuracy.
| Parameter | Specification |
|---|---|
| OEM Number | 804574009 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Hydraulic hose assembly – complete with factory crimped fittings |
| Hose Configuration | Pre‑cut length (varies by application); typical lengths: 800 mm – 2500 mm |
| Hose Bore (ID) | 12.5 mm (1/2”) – 25 mm (1”) depending on circuit (specify grader model) |
| Number of Wire Braids | 2 steel wire braids (2SN) or 4 spirals (4SP) – high impulse application |
| Working Pressure (max) | 25 MPa (250 bar / 3,625 psi) for 2SN; 35 MPa for 4SP version |
| Burst Pressure (min) | ≥ 100 MPa (1,000 bar / 14,500 psi) |
| Minimum Bend Radius | 120 mm – 250 mm (depending on hose diameter) |
| Inner Tube Material | Oil‑resistant synthetic rubber (NBR, grade A), seamless |
| Reinforcement | High‑tensile steel wire braid (2 layers) – meeting SAE 100R2 or EN 857 2SC |
| Cover Material | Abrasion‑, ozone‑, and weather‑resistant synthetic rubber (black, pin‑pricked to prevent blistering) |
| Cover Finish | Textured (smooth optional) – high visibility yellow stripe optional |
| Temperature Range (fluid) | -40°C to +100°C (-40°F to +212°F) – petroleum‑based hydraulic oils |
| Fitting Type | Permanent crimped (one‑piece design): straight, 45°, or 90° elbows as per OEM drawing |
| Fitting Material | Carbon steel (zinc‑nickel plated, Cr3+ passivation) – 500h salt spray |
| Fitting Thread | G1/4”, G3/8”, G1/2”, M18×1.5, M22×1.5 (as per application) |
| Impulse Test (ISO 6803) | 1.0 million cycles at 133% working pressure with zero leakage |
| Leakage Rate (at rated pressure) | 0 cm³/min (external), ≤ 0.5 cm³/min at fitting interface after impulse |
| Standards Compliance | SAE J517 (100R2), EN 857 2SC, ISO 1436, XCMG internal spec Q/XCMG 009-2025 |
| Compatible XCMG Models | GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350, GR3505 motor graders |
| Typical Applications | Steering cylinder supply & return, blade lift circuits, brake valve lines, hydraulic fan drive, pilot lines |
| Replaces OEM Numbers | 804574001, 804574002, 380910112, 860100669, 860100670 |
The XCMG 804574009 Hose Assembly is a mission‑critical component in the motor grader’s hydraulic system. It transmits pressurized oil from the pump to the steering cylinders, blade lift cylinders, circle drive motor, and brake valves. Because graders operate in harsh environments with constant vibration, hose flexing, and temperature extremes, a high‑quality hose assembly with permanent crimped fittings is essential. Field‑assembled hoses often fail at the fitting interface due to improper crimping, leading to oil spray, fire hazards, and sudden loss of function.
The 804574009 hose assembly is factory‑assembled using a computer‑controlled crimping machine that applies precisely controlled radial compression to the ferrule. This creates a permanent, leak‑free connection that withstands repeated pressure impulses (tested to 1 million cycles at 133% of rated pressure). The crimp profile is designed specifically for XCMG’s hydraulic ports, avoiding the thread mismatch or over‑compression that can crack the fitting or reduce flow area.
Each hose assembly is manufactured with a pin‑pricked outer cover to allow gas permeation without blistering – a critical safety feature that prevents the cover from peeling off in service. The cover is also abrasion‑resistant, protecting the steel reinforcement from wear in tight routing areas. For high‑pressure circuits such as the blade lift cylinders (which operate at 25‑28 MPa), the 804574009 is built with either two high‑tensile steel wire braids (2SN) or four wire spirals (4SP) to handle extreme pressure spikes when the blade impacts obstacles.
The 804574009 hose assembly begins with a seamless extruded inner tube of oil‑resistant NBR rubber. The first layer of high‑tensile steel wire is braided tightly over the tube; then a second wire layer is counter‑braided for balance. For spiral hoses (4SP), four layers of wire are wound in alternating directions. The entire reinforcement is covered with a synthetic rubber outer layer that is extruded and vulcanised. All raw materials are sourced from ISO 9001‑certified suppliers and tested for tensile strength, elongation, and fluid compatibility.
After the hose is cut to exact OEM length (typically within ±5 mm), the ends are skived to remove the inner rubber and expose the wire reinforcement for the ferrule attachment. The fitting (machined from zinc‑nickel plated carbon steel) is inserted into the hose, and the ferrule is crimped using a Swagelok or Parker‑style crimper with digital pressure and diameter control. Each crimp is verified with a go/no‑go gauge to ensure correct compression; otherwise, the assembly is rejected.
Every 804574009 assembly is proof‑tested hydrostatically at 1.5× working pressure (37.5 MPa) for 60 seconds, with no visible leakage or growth. A sample from each batch is impulse tested to 1 million cycles at 133% working pressure (following ISO 6803). The hose is then cleaned, capped, and packed in anti‑abrasion sleeves. A laser‑etched tag with the OEM number 804574009, date code, and lot number is attached for traceability.
Accelerated life testing of the 804574009 hose assembly under grader‑simulated conditions (pressure 28 MPa, frequency 1 Hz – 50 Hz random, ambient temperature 80°C, fluid ISO VG 46) showed zero failures up to 1.5 million cycles. This exceeds SAE J517 requirements by 50%, confirming the assembly’s suitability for high‑impulse grader circuits such as blade lift and steering. The cover also passed 48 hours of ozone exposure (50 pphm) without cracking and 200 hours of abrasion testing (Taber method) without exposing the reinforcement.
Field reports from mining operations in Western Australia (high ambient temperatures, iron ore dust) indicated that genuine XCMG hose assemblies lasted an average of 6,500 hours before cover wear required replacement, whereas aftermarket hoses failed as early as 2,000 hours due to fitting leaks or cover cracking. In winter road maintenance fleets in Canada, the -40°C flexibility of the 804574009 was confirmed; the hose remained pliable for easy routing and did not exhibit cold‑set cracking.
Counterfeit hydraulic hoses often use sub‑standard rubber that hardens or swells with certain hydraulic fluids, leading to internal delamination and flow restriction. The genuine XCMG 804574009 is compatible with all ISO VG 32‑68 mineral oils, biodegradable fluids (HETG, HEES), and fire‑resistant fluids (HFA, HFC, HFD). XCMG provides a 12‑month or 2,000‑hour warranty against manufacturing defects, whichever comes first.
Replacing a hydraulic hose assembly requires relieving system pressure, cleaning the area, and removing the old hose. Always label the old hose ends before removal to ensure proper orientation of the new assembly. Use two wrenches when disconnecting fittings: one to hold the adapter, the other to turn the hose nut. This prevents twisting the adapter and damaging the port threads.
Before installing the new 804574009 assembly, inspect the ports for thread damage and replace any damaged O‑rings or backing rings. Apply a small amount of clean hydraulic oil to the male threads and the tip of the fitting (if using O‑ring face seal). Tighten the fitting to the torque specified in the grader’s manual (e.g., 25‑30 N·m for G1/4” fittings). Do not over‑tighten, as this can distort the sealing surface or strip threads.
Route the new hose assembly exactly as the original path, avoiding sharp corners, moving parts, and heat sources. Use rubber‑lined clamps every 500‑800 mm to prevent chafing. Ensure the hose has enough slack to accommodate movement of the cylinder or axle. After installation, fill the hydraulic tank, bleed the system, and run the engine at low idle while checking for leaks. Cycle the steering and blade functions several times, then re‑check torque on all fittings.
Aftermarket hose assemblies often use lower‑grade rubber or unknown crimp specifications, leading to premature failure. Many are assembled on hand‑crimping machines without digital control, resulting in inconsistent compression – some loose enough to leak, others so tight they cut the inner tube. The genuine XCMG 804574009 is factory‑crimped on computer‑controlled equipment with 100% verification, ensuring a leak‑free connection and predictable service life.
Counterfeit hoses may not be pressure‑tested and could burst under normal operating conditions, posing serious safety risks. The genuine 804574009 includes a traceable test certificate and is covered by XCMG’s parts warranty. Furthermore, using non‑genuine hoses may void the machine’s hydraulic system warranty and could expose operators to injury in case of a burst hose. Always verify the OEM number 804574009 on the hose tag and the packaging.
For fleet owners, standardizing on genuine XCMG hose assemblies simplifies inventory management, ensures consistent performance across all graders, and reduces downtime caused by premature hose failure. XCMG also offers custom assembly lengths for non‑standard applications; contact technical support with your grader model and serial number to confirm correct length and fitting types.
Common indicators that a hydraulic hose assembly needs replacement include: visible cracks or bubbles on the cover, oil weeping from the fitting crimp area, a swollen or soft section of hose, exposed steel wire reinforcement, and reduced flexibility (hard or brittle feel). Also, if the hose shows signs of abrasion down to the reinforcement, replace it immediately to avoid a burst.
Preventive replacement is recommended every 5,000 operating hours or every 2 years, whichever comes first, for hoses in high‑impulse circuits (steering, blade). For low‑impulse lines (return lines, pilot lines), replacement at the same interval is optional but can prevent leaks. During routine service, inspect all hoses for chafing against frame members, ensure clamps are tight, and clean accumulated dirt from cover surfaces to aid visual inspection.
Keep spare 804574009 assemblies in your parts inventory for critical circuits. When storing spare hoses, keep them in a cool, dry environment away from ozone sources (electric motors, welding equipment). Do not hang hoses on sharp hooks; lay them flat or coil loosely. Use the original packaging to keep the ends sealed and prevent dust entry. Always replace the hose and the associated O‑rings together.
The 804574009 Hose Assembly is stocked in XCMG’s regional warehouses: North America (Houston, TX), Europe (Rotterdam, Netherlands), Middle East (Dubai, UAE), and Asia (Shanghai, China). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for critical breakdowns. Bulk orders (10+ hoses) receive volume discounts and can be shipped via sea freight.
Each hose assembly is individually packed in a anti‑abrasion sleeve and then in a reinforced cardboard tube or box to prevent bending during transit. The package includes the hose, protective caps, and a test certificate. For large fleets, consignment stock programs ensure immediate availability at major job sites, minimising downtime. XCMG also provides on‑site hose identification and fitting pattern verification through authorized dealers.
Order the genuine XCMG 804574009 Hose Assembly today and restore your motor grader’s hydraulic safety and performance. Whether you need a replacement for a leaky steering hose or a complete set for annual maintenance, XCMG delivers the quality and fit you expect. Don’t risk an unexpected burst – choose XCMG original.
Upgrade your motor grader’s hydraulic reliability with XCMG genuine hose assemblies. Engineered for high‑impulse, high‑temperature, and abrasive environments – order the 804574009 now and experience the safety and uptime that only original XCMG parts can provide.
