The 381600372 Copper Bushing is a genuine OEM precision‑machined bronze sleeve bearing manufactured by XCMG for motor graders and heavy construction equipment. This high‑performance bushing, also known as a copper alloy wear sleeve or plain bearing, provides a low‑friction, long‑wearing bearing surface for heavily loaded pivot joints, hydraulic cylinder ends, and articulation points on XCMG GR series motor graders. Manufactured from centrifugally cast phosphor bronze (CuSn8) with excellent anti‑galling properties, the 381600372 copper bushing is designed to withstand extreme radial and oscillatory loads, shock impacts, and abrasive dust in demanding grading environments.
The copper bushing 381600372 is a direct replacement for worn, extruded, or seized bushings on XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders. Typical applications include blade lift cylinder lower pin bushings, circle drive support pivots, articulation joint bearings, drawbar mounting sleeves, and wheel lean cylinder ends. The bushing features a precisely machined inner diameter with a spiral or cross‑hatch grease groove (or oil dimples) to retain lubricant and reduce friction between the bushing and the mating steel pin.
A worn or extruded copper bushing allows excessive radial play, causing blade drift, poor circle positioning, accelerated pin wear, and structural stress on the surrounding castings. Replacing a damaged bushing with the genuine XCMG 381600372 restores original clearances, eliminates play, and protects the more expensive pins and mounting brackets.
| Parameter | Specification |
|---|---|
| OEM Number | 381600372 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Copper Bushing / Phosphor Bronze Sleeve Bearing |
| Material | Centrifugal‑cast phosphor bronze – CuSn8 (SAE 660) |
| Inner Diameter (ID – finished) | 60.00 mm +0.05 / +0.02 mm (H7 clearance fit) |
| Outer Diameter (OD) | 70.00 mm ±0.02 mm (press‑fit into housing) |
| Length (overall) | 50.00 mm ±0.2 mm |
| Lubrication Grooves | Spiral grease groove (2 mm wide × 0.5 mm deep) or cross‑hatch pattern |
| Tensile Strength | ≥ 260 MPa (37,700 psi) |
| Hardness (HB) | 70 – 85 HB (annealed, oil‑impregnated after machining) |
| Maximum Specific Load (static) | 50 N/mm² (7,250 psi) |
| Maximum Sliding Speed (greased) | 0.5 m/s (oscillatory motion) |
| Operating Temperature Range | -40°C to +120°C (continuous), +150°C peak |
| Coefficient of Friction (greased) | 0.08 – 0.12 (bronze on hardened steel) |
| Standards | ISO 9001:2024, ASTM B505, DIN 1705 |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350 |
| Applications | Blade lift lower pivot, circle support bearing, articulation joint, drawbar mount, wheel lean cylinder ends |
The XCMG 381600372 Copper Bushing is a key component in motor grader pivot points where steel pins rotate within cast iron or steel housings. The bushing provides a softer, low‑friction surface that wears preferentially, protecting the more expensive pin and housing. In the blade lift linkage, the lower bushing supports the blade lift cylinder pin; wear here directly causes blade flop (uncontrolled vertical movement) and reduces grading accuracy.
In the circle drive assembly, the copper bushing 381600372 acts as the bearing for the circle support pivot. A worn bushing allows the circle to tilt under load, causing uneven gear tooth contact, accelerated wear of the circle drive motor, and poor blade angle retention. Replacing a worn bushing restores correct geometry and eliminates play.
Articulation joint lower bearings and drawbar mounting sleeves also use this bushing size. A seized or worn bushing can cause difficult steering, abnormal noise, and cracking of the frame brackets. The bronze material of the 381600372 bushing has excellent embedability – it can absorb small dirt particles without scoring the mating steel pin, which is essential for equipment operating in dusty grading environments.
Each 381600372 copper bushing is centrifugal‑cast from high‑grade phosphor bronze (CuSn8) to produce a dense, porosity‑free structure. The casting is then heat‑treated to relieve internal stresses and rough‑machined to the pre‑finished dimensions. The bushing is then CNC‑turned to the exact outer diameter and overall length. The inner diameter is left with a machining allowance (0.10‑0.15 mm) to allow final line‑reaming after installation, ensuring a perfect fit to the actual pin diameter.
The lubrication grooves are machined using a specially profiled tool to create a spiral or figure‑eight pattern that distributes grease from a single fitting across the entire bearing surface. The grooves are deburred and the bushing is then oil‑impregnated under vacuum to ensure initial lubrication. The final inner diameter is precision‑ground to achieve a surface finish of Ra ≤ 0.8 μm.
XCMG’s quality control includes 100% dimensional inspection of OD, ID, length, groove geometry, and concentricity. Random samples are hardness‑tested (70‑85 HB) and subjected to a load test (50 kN for 5 minutes with no deformation). Only bushings meeting all criteria are accepted for packing under the XCMG Genuine Parts label.
Replacing the copper bushing 381600372 requires removal of the pivot pin and often disassembly of the linkage or circle support. Press the old bushing out using a stepped punch, taking care not to damage the housing bore. Clean the bore thoroughly and inspect for scoring or wear. The new bushing is a press fit (interference 0.03‑0.07 mm). Use a bushing driver that contacts the full OD face to avoid distortion.
After pressing the 381600372 bushing into the housing, the inner diameter must be line‑reamed to the final pin dimension. Use a piloted adjustable reamer, set to the exact pin diameter (typically 60.00 mm +0.05 / +0.02 mm clearance). Ream slowly and constantly, removing equal material along the length. Do not oversize; a loose fit will cause hammering and rapid failure.
After reaming, deburr the edges and install the grease fitting. Pump grease until it emerges from the entire groove. Insert the pin – it should rotate freely without perceptible play. If the pin binds, ream an additional 0.005 mm increments. Always use a new pin when installing a new bushing to ensure proper mating surfaces.
Aftermarket bushings are often made from inferior sintered bronze that crumbles under load or from low‑grade brass with poor wear resistance. The genuine XCMG bushing uses centrifugal‑cast CuSn8, which has excellent wear resistance and embedability. Aftermarket bushings may also have incorrect oversize or undersize IDs, making reaming impossible or resulting in a loose fit.
Counterfeit bushings sometimes have no lubrication grooves or have grooves that do not align with the grease passage. The 381600372 has precision‑machined grooves that guarantee grease coverage over the full bearing area. Genuine XCMG bushings are also marked with the part number and XCMG logo for traceability.
XCMG provides a 12‑month warranty against manufacturing defects. Using genuine parts ensures that your grader’s pivot points maintain correct geometry, preventing structural cracks in the circle support and drawbar. Choose the 381600372 genuine copper bushing for long, trouble‑free service.
Common signs that the copper bushing 381600372 needs replacement: excessive radial play (visible movement when prying the joint), unusual knocking noise when the circle rotates or blade lifts, accelerated pin wear (pin diameter reduced), and grease leaking past the bushing ends. Also, if the bushing has extruded or spun in the housing, immediate replacement is mandatory.
Preventive replacement is recommended every 5,000 operating hours or whenever the associated pin is removed for inspection. The cost of a bushing is small compared to the cost of repairing a cracked circle support or worn casting. Always replace both the upper and lower bushings in pairs for even load distribution.
Store bronze bushings in a dry, covered area to prevent oxidation. The oil‑impregnated finish provides short‑term corrosion protection; long‑term storage may require light oil coating. Shelf life is 10 years when properly stored.
The 381600372 Copper Bushing is stocked in XCMG regional warehouses in North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for urgent repairs. Bulk orders (10+ bushings) receive volume discounts and can be shipped via sea freight.
Each bushing is supplied in a corrosion‑inhibiting wrapper with a part number label. For large fleets, consignment stock programs are available to ensure immediate availability and reduced downtime. Don’t let a worn copper bushing compromise your grader’s circle alignment or blade control.
Order the genuine XCMG 381600372 Copper Bushing today and restore precision to your motor grader’s pivot points. This bushing is an essential component for circle support and blade lift systems. Keep spares in your service inventory and always replace with genuine XCMG parts.
Upgrade your motor grader’s reliability with the XCMG genuine copper bushing. Engineered for strength, low friction, and long wear life – order now and experience the quality that keeps your grader accurate and productive.
