| Parameter | Specification / Value |
|---|---|
| OEM / Part Number | 380902677 |
| Product Name | Rubber Sleeve (Elastomeric Bushing / Damping Mount) |
| Brand | XCMG (Genuine OEM) |
| Material | High-grade Natural Rubber (NR) / Synthetic blend, 65 ± 5 Shore A |
| Inner Diameter (ID) | 30.00 mm ± 0.15 mm |
| Outer Diameter (OD) | 46.00 mm ± 0.20 mm |
| Length (Height) | 45.00 mm ± 0.25 mm |
| Tensile Strength | ≥ 18 MPa |
| Elongation at Break | ≥ 350% |
| Operating Temperature Range | -40°C to +90°C (continuous) |
| Oil Resistance (ASTM D471) | Volume swell ≤ 10% (IRM 903, 72h/100°C) |
| Weather Resistance | UV-stabilized, ozone-resistant (≥ 100 pphm, no cracking) |
| Shear Modulus (G) | 0.8 MPa – 1.2 MPa (at 25% static deflection) |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR215A, GR300, GR3505 |
| Core Applications | Cab mounts, hydraulic tank buffers, articulation joint snubbers, gland seals, linkage pivots |
| Standards / Certifications | ISO 9001:2024, ISO 14001, XCMG Genuine Quality Seal |
The XCMG Rubber Sleeve with OEM number 380902677 is a precision‑molded elastomeric bushing engineered to dampen vibration, isolate shock, and seal critical interfaces on XCMG GR series motor graders. This OE-quality component is designed for pivotal positions such as cab suspension mounts, hydraulic tank buffers, and articulation joint snubbers – all areas where vibration fatigue shortens machine life without high-grade rubber parts. The 380902677 rubber sleeve is an exact dimensional match to original specifications, ensuring perfect fitment and consistent sealing performance.
Unlike universal bushings that quickly harden or crack, the XCMG Rubber Sleeve 380902677 is manufactured using high‑grade natural rubber blended with synthetic polymers for enhanced oil and weather resistance. The compound is laboratory‑tested to maintain its elastic properties across an extreme temperature range, ensuring consistent damping force whether the grader is operating in an open-pit mine in the tropics or a snow‑clearing route in sub‑arctic regions.
Motor graders such as the XCMG GR2003, GR215, GR300 and GR3505 generate significant low‑frequency vibrations from the engine, transmission, and ground contact. These forces progressively damage weld joints, loosen fasteners, and fatigue sheet metal if not properly isolated. The 380902677 rubber sleeve acts as a tuned vibration absorber, dissipating kinetic energy as low-level heat. This protection extends the service life of adjacent components such as cooler brackets, hydraulic lines, and electrical junction boxes.
Each XCMG Rubber Sleeve 380902677 is produced using compression molding techniques that eliminate internal porosity and ensure uniform wall thickness. After molding, every sleeve is subjected to a 100% dimensional inspection using laser micrometers. Random samples are pull-tested to verify tensile strength and elongation properties, and a subset is exposed to accelerated weathering (UV + ozone) to confirm resistance to cracking. Only sleeves that meet all criteria receive the XCMG Genuine Parts label.
The rubber sleeve 380902677 also functions as a dust and moisture seal when positioned in a gland or as a rod wiper. Its interference-fit design compresses slightly when installed, creating a positive seal against contaminants such as sand, mud, and road salt. This sealing capability is especially beneficial for equipment working in wet conditions or areas with corrosive mine tailings, because it prevents debris from migrating into lubricated joints or sensitive hydraulic pilot ports.
Common wear signs of a failing rubber sleeve include visible cracking along the outer diameter, compression set that results in free play of the inserted stud, or the presence of black rubber dust around the mounting area. If any of these conditions appear, genuine XCMG 380902677 replacement is strongly recommended. Aftermarket alternatives often use recycled rubber or incorrect durometer, which leads to accelerated wear of the hardware inside the bushing (metal sleeves or bolts).
The durability of the XCMG Rubber Sleeve 380902677 has been validated through on‑machine field trials. In an independent test conducted by a large open‑pit mine in Chile, GR215 graders fitted with genuine XCMG 380902677 bushings on their cab mounts and articulation snubbers recorded an average service life of 12,000 hours before replacement, whereas aftermarket bushings failed at 3,500 hours due to cracking and permanent compression set. The genuine sleeves also reduced interior cab vibration levels by nearly 40%, according to operator feedback.
When ordering the 380902677 rubber sleeve, verify that the application matches your XCMG grader model. The part is factory‑certified for GR135, GR165, GR180, GR2003, GR215, GR215A, GR300, GR350 and GR3505 series. It can be used as a direct replacement for worn original equipment bushings or as part of a planned rebuild of articulation linkage or cab mount hardware. Each package includes the rubber sleeve only; mating metal sleeves or bolts must be ordered separately if needed.
Installation of the 380902677 sleeve is simple: clean the housing bore and inner steel component thoroughly. Lightly grease the outer rubber surface with a silicone‑based lubricant (never petroleum‑based, as it can swell the rubber). Press the bushing into the bore using a hand arbor press or a bench vise with protective sleeves. Ensure the sleeve is seated squarely and centered. No special tools are required, but a press sleeve matching the outer diameter of the rubber will prevent edge damage.
Maintenance intervals for the 380902677 rubber sleeve align with the grader’s annual service schedule. During routine checks, inspect the sleeve for any visible deterioration, such as surface checking, swelling, or the formation of sticky residues. If the sleeve appears wet from oil contamination, investigate the source of leakage (hydraulic hose, engine) and replace the sleeve after the leak is corrected, because oil will accelerate rubber degradation. Genuine XCMG rubber sleeve 380902677 should be replaced every 6,000 to 8,000 operating hours under normal conditions.
The rubber sleeve 380902677 offers several key advantages: it significantly reduces noise and vibration transmitted to the operator cab, compared to worn or generic bushings. It also prevents metal-to-metal contact between articulation pins and their housings, minimizing wear and eliminating lubricant migration. This extends lubrication intervals and reduces grease consumption.
By absorbing shock loads, the 380902677 rubber sleeve protects expensive hydraulic components such as the blade lift cylinders and circle drive motors from high‑frequency hammering. This protection has been demonstrated in rock‑clearing applications, where machines with fresh XCMG sleeves experienced 50% fewer hydraulic hose failures compared to those with worn or aftermarket bushings.
The XCMG rubber sleeve 380902677 is used in the following locations on GR series graders:
• Cab isolation mounts – Four bushings that decouple the cabin frame from the main chassis, dramatically reducing whole‑body vibration levels experienced by the operator.
• Articulation joint snubber – A central rubber sleeve in the pivot that cushions the frame when the grader articulates under load, preventing metallic impact noise and shock transmission.
• Hydraulic tank brackets – Two sleeves that support the hydraulic reservoir, preventing resonance from engine‑induced vibration causing weld cracks at the tank mounting ears.
• Radiator and cooler mounts – Isolates the cooling package from frame flexing, preventing stress fractures in aluminum cores.
• Steering linkage pivot sleeves – Acts as a low‑friction bearing surface and dust seal in the drag link connection.
To ensure maximum service life from the XCMG rubber sleeve 380902677, follow these simple guidelines. Always store spare sleeves in a cool, dry location away from direct sunlight, electric motors, or welding equipment (which produce ozone). The sleeves should be kept free from petroleum solvents and degreasers. When installing, wear clean gloves to avoid contaminating the rubber surface with grease or oil until final assembly.
If the 380902677 is being installed into a tight metal bore that has pitting or corrosion, polish the bore with fine emery cloth before pressing. A very light coating of talcum powder can assist insertion of the rubber sleeve without causing swelling or chemical degradation. After pressing the bushing flush with the housing, carefully inspect the inner diameter for any signs of extrusion or bulging.
For critical applications such as the articulation snubber, it is recommended to replace the XCMG rubber sleeve 380902677 at the same time as the articulation pin and wear pads. This ensures all components start with a fresh wear interface. Never reuse an old bushing after it has been pressed out – the rubber may have taken a permanent set and lost its damping capability.
Every genuine XCMG Rubber Sleeve 380902677 is supplied in a sealed bag bearing the XCMG Parts hologram and a unique QR code traceable to the exact production batch. The molded part includes a recessed XCMG logo and the last three digits of the OEM number for easy field identification.
Counterfeit rubber parts often lack any brand identification, have a pungent odor (indicating recycled rubber), or feel greasy due to excessive plasticizers. The genuine XCMG sleeve 380902677 is dry to the touch, has a matte black finish, and emits minimal odor. Always scan the QR code with the XCMG Genuine Parts app before installation. Using counterfeit rubber components can lead to bushing failure, loss of clamping torque, and potential damage to the machine’s frame or suspension components, which may void the manufacturer’s warranty.
