The 380903347 Rubber Sleeve is a genuine XCMG elastomeric component designed for motor graders to absorb vibration, reduce noise, and protect hydraulic and chassis connections. This precision‑molded sleeve, also known as an isolation sleeve or damping bushing, provides a resilient barrier between rigid components in XCMG GR series graders. Manufactured from high‑grade synthetic rubber with excellent oil and weather resistance, the 380903347 rubber sleeve minimizes metal‑to‑metal contact, reduces fretting wear, and extends the service life of connecting pins and brackets in demanding grading environments.
The 380903347 rubber sleeve is a direct replacement for cracked, hardened, or oil‑swollen sleeves in XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders. Typical applications include hydraulic cylinder pin mounts, articulation joint isolators, cab mounting supports, and hose pass‑through panels. The sleeve features a smooth internal bore and a ribbed outer surface that ensures a tight fit while allowing controlled compliance.
Proper vibration damping is critical for operator comfort and component longevity. A degraded or missing rubber sleeve allows metal‑to‑metal impact, causing premature pin wear, bracket cracking, and increased noise transmission. Replacing a worn sleeve with the genuine XCMG 380903347 restores original isolation performance, reduces fatigue loads on adjacent components, and protects your grader’s structural integrity.
| Parameter | Specification |
|---|---|
| OEM Number | 380903347 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Rubber Sleeve / Elastomeric Isolator / Damping Bushing |
| Material | Synthetic rubber (NR + SBR blend), 70 ± 5 Shore A |
| Inner Diameter | 20 mm (±0.5 mm) |
| Outer Diameter | 32 mm (±0.8 mm) |
| Length | 35 mm (±0.5 mm) |
| Tensile Strength | ≥ 12 MPa (1740 psi) |
| Elongation at Break | ≥ 300% |
| Compression Set (70h / 70°C) | ≤ 25% |
| Temperature Range | -40°C to +100°C (-40°F to +212°F) |
| Oil Resistance (ASTM #1 oil, 70h / 100°C) | Volume swell ≤ 15% |
| Ozone Resistance | No cracking after 72h at 50 pphm / 40°C |
| Static Axial Stiffness | 180 N/mm (±15%) |
| Surface Treatment | Silicone‑free mold release, ready to install |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 380903301, 380903325, 380903338 |
The XCMG 380903347 rubber sleeve is strategically placed at pivot points where hydraulic cylinders, linkage pins, or cab mounts attach to the main frame. Its elastomeric nature absorbs high‑frequency vibrations generated by the engine, drivetrain, and ground impacts, preventing them from transmitting to the operator cabin and sensitive electronic components.
Without a functional rubber sleeve, rigid metal components will hammer against each other, causing fatigue cracks in brackets and accelerated wear of pin bores. The 380903347 sleeve acts as a sacrificial wear element, protecting expensive castings and weldments.
When the rubber hardens due to age, oil contamination, or ozone attack, its damping effectiveness drops dramatically, leading to increased operator fatigue and potential damage to hydraulic hoses. Replacing a degraded sleeve with the genuine 380903347 restores original vibration isolation and extends the life of adjacent components.
Each 380903347 rubber sleeve is compression‑molded from a proprietary blend of natural rubber (NR) and styrene‑butadiene rubber (SBR), optimized for high abrasion resistance, low compression set, and excellent dynamic properties. Carbon black reinforcement provides tensile strength up to 12 MPa.
The formulation includes anti‑ozonants and antioxidants to resist cracking in high‑ozone environments (typical near electric motors or in sunny climates). The rubber is post‑cured to stabilize cross‑linking, ensuring consistent stiffness across the operating temperature range.
XCMG performs 100% visual inspection for voids, flash, or surface defects. Random samples are tested for Shore A hardness, tensile strength, and compression set. Each sleeve is marked with the XCMG logo and a batch code for traceability.
To replace the 380903347 rubber sleeve, first relieve the load on the joint (support hydraulic cylinders or the cab). Remove the retaining pin or bolt. Clean the housing bore and the pin thoroughly – any sharp burrs must be removed as they can cut the rubber during installation.
Lightly lubricate the outside of the new rubber sleeve with soapy water or a silicone‑free lubricant. Never use petroleum‑based grease which can swell the rubber. Press or push the sleeve into the housing bore until it seats flush against the shoulder.
Insert the pin or bolt through the sleeve’s inner bore. Torque the retaining nut to specification (typically 80‑100 N·m for M16 pins). Check for free rotation – the rubber should allow slight angular compliance without binding. Replace all sleeves on the same pin as a set for even loading.
Signs that the 380903347 rubber sleeve needs replacement include: visible cracking or chunking of the rubber, excessive free play at the joint (felt as a clunk when moving the component by hand), hardened rubber that no longer compresses (feels like plastic), and oil soaking causing swelling or softening.
A completely failed sleeve may extrude from the housing, allowing metal‑to‑metal contact. If ignored, this can damage the pin and the housing bore, requiring costly rework. Replace the rubber sleeve at the first sign of deterioration to protect your grader’s structure.
Aftermarket rubber sleeves are often made from lower‑grade recycled rubber or neoprene that hardens within months. They may have incorrect hardness (too soft causing excessive movement, or too hard offering no isolation). Counterfeit sleeves may be undersized, leading to loose fit and accelerated wear.
Genuine XCMG 380903347 sleeves are manufactured to exact OE dimensions, with precise Shore A hardness and oil resistance. They are batch‑tested for compression set and ozone resistance. Each sleeve carries the XCMG logo and meets the original design life of 4000+ hours.
XCMG provides a 12‑month warranty against manufacturing defects. Using genuine rubber sleeves ensures consistent vibration damping, reduces cabin noise, and prevents premature wear of pins and brackets. Protect your operator comfort and machine durability with genuine XCMG parts.
Inspect the 380903347 rubber sleeve every 500 operating hours. Look for surface cracks deeper than 2 mm, oil swell (the sleeve appears bulging), or signs of extrusion. With a pry bar, check for excess joint movement – more than 3‑4 mm of radial play indicates a worn sleeve.
Replace rubber sleeves proactively every 2,000 hours or when performing major hydraulic cylinder rebuilding. The cost of a set of sleeves is minimal compared to the labor to replace a worn pin or ream an elongated bore. Keep spare 380903347 sleeves in your parts inventory.
When greasing adjacent bearings, avoid applying grease directly onto the rubber – petroleum‑based lubricants accelerate swelling. Use only approved rubber‑safe greases on nearby fittings. Proper storage of spare sleeves in a cool, dark place (away from ozone sources) extends their shelf life.
The 380903347 Rubber Sleeve is stocked in XCMG regional warehouses: Houston (North America), Rotterdam (Europe), Dubai (Middle East), and Shanghai (Asia). Standard air freight delivers within 3‑7 business days; expedited 1‑2 day shipping is available for urgent repairs.
Each sleeve is individually packaged in sealed plastic bags to prevent ozone attack during transport. Bulk orders (25+ sleeves) receive volume discounts and can be shipped via sea freight. For large fleets, consignment stock programs ensure immediate availability and reduce downtime.
Order the genuine XCMG 380903347 Rubber Sleeve today and restore vibration isolation to your motor grader. Whether you are replacing a hardened bushing in a cab mount or a worn sleeve in the articulation joint, the 380903347 guarantees proper fit, correct elasticity, and long‑term durability. Keep your grader quiet, comfortable, and structurally sound.
Upgrade your grader’s ride quality and component protection with XCMG genuine elastomeric parts. The 380903347 rubber sleeve reflects XCMG’s commitment to operator comfort and machine reliability. Trust genuine parts to keep your GR series motor graders performing at their best, hour after hour.
