The 803191112 Hydraulic Hose I is a genuine OEM high‑pressure hose assembly manufactured by XCMG for motor grader hydraulic systems, including steering circuits, blade lift functions, brake lines, and pilot control networks. This precision‑assembled hose consists of an oil‑resistant synthetic rubber inner tube, high‑tensile steel wire braid reinforcement, and an abrasion‑resistant synthetic rubber cover. Designed for GR series motor graders (GR135, GR165, GR180, GR2003, GR215, GR300, GR350), the 803191112 hose assembly withstands working pressures up to 28 MPa (280 bar) and extreme impulse spikes, ensuring reliable hydraulic power transmission in demanding grading environments.
The 803191112 Hydraulic Hose I comes with pre‑installed permanent crimped fittings (straight or 45°/90° 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, significantly reducing installation time and improving overall reliability. The hose is temperature‑rated from -40°C to +100°C and is resistant to ozone, UV exposure, and hydraulic oil permeation, making it ideal for open‑pit mining, highway construction, and agricultural land‑leveling 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 cracked, swollen, or abraded hose with the genuine XCMG 803191112 assembly restores full hydraulic integrity, eliminates leaks, and ensures factory‑specified flow capacity. Always trust XCMG original hose assemblies for safety, performance, and exact fitment.
| Parameter | Specification |
|---|---|
| OEM Number | 803191112 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Hydraulic Hose Assembly I – high‑pressure, factory crimped |
| Hose Construction | Seamless NBR inner tube + 2 steel wire braids + synthetic rubber cover |
| Hose Bore (ID) | 12.5 mm (1/2”) – 19 mm (3/4”) depending on specific circuit |
| Number of Wire Braids | 2 steel wire braids (2SN) – high impulse rating |
| Working Pressure (max) | 28 MPa (280 bar / 4,060 psi) |
| Burst Pressure (min) | ≥ 112 MPa (1,120 bar / 16,240 psi) |
| Minimum Bend Radius | 130 mm – 180 mm (dependent on hose diameter) |
| Inner Tube Material | Oil‑resistant synthetic rubber (NBR), seamless, smooth bore |
| Reinforcement | Two layers of high‑tensile steel wire, counter‑spiralled |
| Cover Material | Abrasion‑, ozone‑, and weather‑resistant synthetic rubber (black, pin‑pricked) |
| Cover Finish | Textured (anti‑slip) with optional yellow identification stripe |
| Temperature Range (fluid) | -40°C to +100°C (-40°F to +212°F) for petroleum‑based oils |
| Fitting Type | Permanent crimped one‑piece design – straight, 45°, or 90° elbows |
| Fitting Material | Carbon steel with zinc‑nickel plating (Cr3+ passivation) – 500h salt spray |
| Fitting Thread Options | G1/4”, G3/8”, G1/2”, M18×1.5, M22×1.5 as per OEM drawing |
| Impulse Test (ISO 6803) | ≥ 1.0 million cycles at 133% working pressure, zero leakage |
| Leakage Rate (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 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, pilot lines |
| Replaces OEM Numbers | 803191100, 803191102, 380910199, 860100672, 860100673 |
The XCMG 803191112 Hydraulic Hose I 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 803191112 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 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 803191112 is built with two high‑tensile steel wire braids (2SN) to handle extreme pressure spikes when the blade impacts obstacles.
The 803191112 Hydraulic Hose I 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 digital pressure‑controlled crimper. Each crimp is verified with a go/no‑go gauge to ensure correct compression; otherwise, the assembly is rejected.
Every 803191112 assembly is proof‑tested hydrostatically at 1.5× working pressure (42 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 803191112, date code, and lot number is attached for traceability.
Accelerated life testing of the 803191112 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 803191112 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 803191112 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 803191112 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 803191112 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 803191112 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 803191112 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 803191112 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 803191112 Hydraulic Hose I 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 an 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 803191112 Hydraulic Hose I 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 803191112 now and experience the safety and uptime that only original XCMG parts can provide.
