The 380603420 Brass Bushing is a genuine XCMG sleeve bearing manufactured from high‑grade phosphor bronze for motor grader articulation points, blade linkages, and pivot assemblies. This precision‑machined bushing provides a low‑friction, wear‑resistant surface for rotating or oscillating pins in XCMG GR series motor graders. Engineered with excellent anti‑galling properties and high load‑carrying capacity, the 380603420 brass bushing reduces friction, dampens vibration, and extends the service life of pin joints in demanding grading environments.
The 380603420 brass bushing is a direct replacement for worn, scored, or oval‑shaped bushings in XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders. Typical applications include the circle rotation support pins, blade lift linkage pivots, articulation joint bearings, and steering cylinder mounts. The bushing features a smooth internal bore with lubrication grooves to retain grease, ensuring consistent lubrication and preventing seizure.
Proper bushing condition is critical for maintaining precise geometry of the grader’s circle and blade. A worn bushing allows pin displacement, causing misalignment, uneven blade movement, and accelerated wear of both the pin and the housing bore. Replacing a worn bushing with the genuine XCMG 380603420 restores factory clearances, reduces free play, and protects your grader’s structural components from premature fatigue.
| Parameter | Specification |
|---|---|
| OEM Number | 380603420 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Brass Bushing / Sleeve Bearing / Phosphor Bronze Bushing |
| Material | Phosphor bronze (CuSn8 / SAE 660), centrifugal cast |
| Inner Diameter (finished) | 30.00 mm (+0.05 / +0.10 mm) for pin clearance |
| Outer Diameter | 36.00 mm (+0.00 / +0.05 mm) – interference fit into housing |
| Overall Length | 45 mm (±0.2 mm) |
| Wall Thickness | 3.0 mm (±0.05 mm) |
| Hardness (HB) | 80 – 100 HB (annealed) |
| Tensile Strength | ≥ 310 MPa (45,000 psi) |
| Yield Strength (0.2%) | ≥ 170 MPa (24,600 psi) |
| Elongation | 10 – 15% |
| Surface Finish (Ra) | ≤ 0.8 µm (reamed / honed bore) |
| Lubrication Grooves | Helical / spiral oil channel (1.5 mm wide, 0.5 mm deep) on ID |
| Max. Static Load Capacity | 65 MPa (9,400 psi) projected area |
| Operating Temperature Range | -50°C to +180°C (-58°F to +356°F) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 380603401, 380603415, 380603418 |
The XCMG 380603420 brass bushing is installed in the eye of linkage arms, cylinder ends, and frame brackets where steel pins rotate under high load. The bushing acts as a sacrificial bearing surface, protecting the more expensive housing from wear while providing a low‑coefficient‑of‑friction interface.
In a motor grader, these bushings are found in the blade lift arm pivots, circle drawbar support, articulation joint, and hydraulic cylinder rod ends. The bushing’s bronze composition resists seizure even when lubrication is temporarily interrupted, a critical advantage in dusty grading conditions.
A worn bushing causes the pin to move eccentrically, leading to hammering, noisy operation, and accelerated wear of the housing bore. Replacing the bushing with a genuine 380603420 restores the correct clearance (0.05‑0.15 mm), eliminates play, and extends the life of the pin and housing.
Each 380603420 brass bushing is machined from centrifugal‑cast phosphor bronze (CuSn8) bar stock. Centrifugal casting produces a dense, fine‑grain structure with no porosity, ensuring consistent mechanical properties and excellent wear resistance. The tin content (7‑9%) provides anti‑friction characteristics and resistance to galling.
After rough machining, the bushing is stress‑relieved to remove residual cutting stresses. The inner diameter is then precision‑reamed or honed to achieve a surface finish of Ra ≤ 0.8 µm, essential for proper oil film retention. A spiral lubrication groove is machined into the bore to distribute grease evenly along the pin.
XCMG inspects each bushing for dimensional accuracy (ID, OD, length), surface finish, and hardness. Random samples are tested for tensile strength and elongation. Only bushings that meet all specifications are marked with the XCMG logo and part number, then packed with anti‑corrosion oil.
Replacing the 380603420 brass bushing requires removing the pin and pressing out the old bushing. Use a suitable drift or hydraulic press; never hammer directly on the bushing as this can distort the housing. Clean the housing bore thoroughly and inspect for scoring or ovality.
Apply a thin layer of grease or anti‑seize to the outside of the new bushing. Press the bushing into the housing bore until it is flush with the face or seated against an internal shoulder. Ensure proper orientation – the lubrication groove must align with the grease fitting hole in the housing. Insert a grease fitting to confirm alignment.
After installation, ream the bushing ID if necessary to achieve the correct pin clearance (typically 0.05‑0.15 mm for a 30 mm pin). Lubricate the bushing with NLGI #2 grease before inserting the pin. Torque the pin retaining hardware to specification. Cycle the joint several times to distribute grease.
Typical indicators that the 380603420 brass bushing needs replacement include: excessive radial play felt as a clunk when moving the linkage, scoring or galling visible on the pin (copper transfer indicates bushing wear), an elongated or oval bore, and difficulty injecting grease (worn bushing may block the grease passage).
If the bushing is found cracked or missing pieces, debris may have contaminated the grease system. Replace all bushings in the same joint simultaneously. Do not reuse a bushing that has been pressed out – once removed, it will not retain proper interference fit.
Aftermarket brass bushings are often made from lower‑grade bronze (e.g., CuZn40) or even cast iron with a brass coating. These materials lack the necessary hardness and anti‑galling properties, leading to rapid wear or seizure. Some aftermarket bushings have incorrect wall thickness, causing loose fit or housing damage.
Genuine XCMG 380603420 bushings are produced from certified phosphor bronze with controlled composition. The precision machining ensures consistent ID/OD dimensions and surface finish. Each bushing is designed specifically for the XCMG GR grader application, guaranteeing correct fit and performance.
XCMG provides a 12‑month warranty against manufacturing defects. Using genuine XCMG bushings ensures reliable operation, reduces downtime, and protects your investment. Don’t risk a seized pin or damaged housing with cheap substitutes.
Inspect the 380603420 brass bushing every 1,000 operating hours. With the pin installed, use a dial indicator or pry bar to measure radial movement at the joint. Free play exceeding 1.5 mm indicates bushing wear. Remove the pin and visually inspect the bushing bore for scoring or ovality.
Replace bushings proactively every 3,000 hours or when rebuilding hydraulic cylinders or linkage assemblies. The cost of a set of bushings is minimal compared to the labor to ream an elongated housing and fabricate an oversized pin. Keep a spare 380603420 bushing in your parts inventory.
Lubricate the bushing through its grease fitting every 50 operating hours or daily in dusty conditions. Use NLGI #2 lithium‑based grease with EP additives. Over‑greasing is not harmful – excess grease will purge from the joint, carrying away contaminants. Regular greasing is the most effective way to maximize bushing life.
The 380603420 Brass Bushing 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 emergency repairs. Sea freight options are available for bulk orders.
Each bushing is individually wrapped in VCI paper and packed in a foam‑lined box to prevent surface damage. For large fleets, consignment stock programs are available to ensure immediate availability and reduce maintenance delays. Don’t let a worn bushing cause pin and housing damage.
Order the genuine XCMG 380603420 Brass Bushing today and restore smooth, precise motion to your motor grader’s linkage joints. Whether you are rebuilding a worn blade lift pivot or replacing a seized articulation bush, the 380603420 guarantees correct fit, proper clearance, and long‑term reliability. Keep your grader operating with factory precision.
Upgrade your maintenance program with OEM‑grade XCMG components. The 380603420 brass bushing reflects XCMG’s commitment to quality – from precise bronze metallurgy to precision machining. Trust genuine parts to keep your GR series motor graders working efficiently and profitably.
