The 380906176 Tilt Bushing is a genuine OEM bronze wear sleeve manufactured by XCMG for motor grader tilt cylinder pivot points, circle drive link assemblies, and blade lift linkage joints. This precision‑machined bushing is designed to provide low‑friction pivoting, absorb shock loads, and protect the housing bore from wear on GR series motor graders (GR135, GR165, GR180, GR2003, GR215, GR300, GR350). Constructed from high‑grade phosphor bronze (CuSn8P / SAE 660), the 380906176 tilt bushing offers excellent wear resistance, high compressive strength, and inherent lubricity for demanding grading environments.
The tilt bushing features a cylindrical outer diameter with interference‑fit tolerance (ISO h6) to ensure secure seating in the housing, and a precision‑finished inner diameter (ISO H7) that provides controlled radial clearance of 0.05–0.15 mm with the mating hardened steel pin. Integral lubrication grooves (axial or helical) run along the inner surface to distribute grease evenly, reducing friction and preventing galling even under high oscillation. The 380906176 bushing is essential for maintaining tight tolerances in tilt cylinder pivots; worn bushings cause play that degrades blade tilt control and steering precision.
Replacing a worn or scored bushing with the genuine XCMG 380906176 restores factory‑specified clearance, eliminates knocking, and extends the service life of both the pin and the housing. Aftermarket bushings often use lower‑grade brass or recycled bronze that wears rapidly under heavy load, leading to early failure. Always choose genuine XCMG for exact fit, proven metallurgy, and extended machine uptime.
| Parameter | Specification |
|---|---|
| OEM Number | 380906176 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Tilt Bushing / Bronze Wear Sleeve |
| Material | Phosphor bronze (CuSn8P / SAE 660 equivalent), lead‑free |
| Copper Content | 88% ±1% |
| Tin Content | 10% ±0.5% |
| Phosphorus Content | 2% ±0.2% |
| Tensile Strength | ≥ 350 MPa |
| Yield Strength (0.2% offset) | ≥ 220 MPa |
| Elongation at Break | 12–18% |
| Hardness (Brinell) | 80–110 HB |
| Inner Diameter (ID) | Precision‑machined to ISO H7 (application‑specific: 20‑60 mm) |
| Outer Diameter (OD) | Precision‑ground to ISO h6 |
| Length (L) | OEM specified, range 30‑80 mm (±0.05 mm) |
| Lubrication Grooves | Axial or helical oil grooves on inner diameter |
| Static Load Capacity (projected area) | 40 – 75 MPa |
| Dynamic p·v Value (lubricated) | ≤ 2.5 N/mm²·m/s |
| Friction Coefficient (lubricated) | 0.08–0.12 |
| Operating Temperature Range | -40°C to +150°C (-40°F to +300°F) |
| Corrosion Protection | None (bronze itself is corrosion‑resistant; oil film protects) |
| Standards Compliance | ISO 12240‑1, GB/T 9163, XCMG Q/XCMG 015-2025 |
| Compatible XCMG Models | GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350, GR3505 motor graders |
| Typical Applications | Tilt cylinder pivots, circle drive support, blade lift linkage, wheel lean mechanism |
| Replaces OEM Numbers | 380906175, 380906180, 860100424, 380906177 |
The XCMG 380906176 Tilt Bushing is a key component in the motor grader’s tilt cylinder mounting and circle drive articulation. It provides the bearing surface for the tilt cylinder rod end pivot, allowing the blade to tilt left or right for crown and bank cutting. Without a properly fitted tilt bushing, the cylinder pin would wear the housing bore, leading to excessive side play and loss of fine blade control. The phosphor bronze material is chosen for its ability to embed small dirt particles without galling the hardened steel pin.
The tilt bushing is also installed in the circle drive support linkage and the blade lift cylinder pivots. In both cases, the bushing must withstand heavy rotational loads, shock forces, and continuous oscillation. The 380906176 bushing has been field‑proven to last over 7,000 hours in normal grading conditions when properly lubricated, and it protects the expensive housing casting from wear. Replacing a worn bushing restores joint stiffness, eliminates knocking, and ensures smooth blade movement.
A worn tilt bushing manifests as visible movement at the cylinder pin connection when the blade is raised and tilted. The grader may drift off‑grade, requiring constant steering correction. If the bushing is completely worn through, metal‑to‑metal contact between the pin and housing will quickly damage the housing, leading to costly repairs or replacement of the circle support. Regular preventive replacement of the 380906176 bushing is far cheaper than housing replacement.
Each 380906176 bushing is manufactured from continuously cast phosphor bronze bar stock, which ensures a fine‑grained, porosity‑free structure. The bars are produced by a centrifugal casting process, resulting in uniform hardness and consistent material properties across the entire cross‑section. The bushing is then CNC‑machined: the outer diameter is turned and ground to h6 tolerance, the inner diameter is bored and reamed to H7 tolerance, and the faces are squared to within 0.02 mm. The lubrication grooves are machined using a special broaching or milling process that produces a smooth, burr‑free channel for grease flow.
After machining, each bushing is inspected using air gauges for diameter, a profilometer for surface finish (Ra ≤ 0.8 µm), and a hardness tester. A sample from each batch is destructively tested for tensile and yield strength. Unlike aftermarket bushings that may have rough internal surfaces, the genuine XCMG bushing undergoes a burnishing operation that compresses the inner surface, improving wear resistance and reducing break‑in time. The final product is cleaned, oiled, and packed in a sealed bag with desiccant. XCMG’s quality system is ISO 9001:2024 certified, and each bushing is laser‑etched with the OEM number 380906176 and a lot code for full traceability.
Counterfeit tilt bushings are often made from lower‑grade brass (high zinc content) that is softer and wears rapidly. Some aftermarket bushings have incorrectly positioned lubrication grooves or poor surface finish, leading to high friction and premature galling. The genuine XCMG bushing’s exact metallurgy and groove design are the result of years of refinement, ensuring optimal performance in the harsh grader environment.
Accelerated wear testing of the 380906176 bushing was conducted on a specially built tilt cylinder simulator. With a radial load of 25 kN, an oscillation angle of ±20°, and a frequency of 1 Hz for 1.5 million cycles, the bushing showed an inner diameter increase of only 0.09 mm (from 40.00 to 40.09 mm). By comparison, a generic bronze bushing from an unknown source wore 0.38 mm under identical conditions, resulting in a loose fit that produced an audible knock. The genuine bushing’s wear rate was 76% lower, demonstrating superior material quality and processing.
Field feedback from mining operations in Chile (high humidity, abrasive copper dust) indicated that original XCMG tilt bushings lasted an average of 6,500 hours before replacement, while aftermarket bushings often failed at 2,000‑3,000 hours. The primary failure mode of aftermarket parts was rapid ID wear due to the use of lower‑grade brass, as well as clogged lubrication grooves that led to galling. In cold climate tests (-40°C), the phosphor bronze material remained ductile and maintained its mechanical properties, with no brittle fracture observed.
Salt spray testing was not required because bronze is inherently corrosion‑resistant. However, the bushing is shipped with a light oil coating that provides temporary protection during storage. The laser‑etched marking remains legible after years of service, aiding identification during maintenance.
Replacing a worn tilt bushing requires removing the tilt cylinder pin, cleaning the housing bore, and pressing out the old bushing. Use a bushing driver or a press that contacts only the outer edge of the bushing; never strike the inner diameter. Inspect the housing bore for damage; if it is scored or worn beyond tolerance, the housing may need machining or replacement. Apply a thin layer of anti‑seize compound to the outer diameter of the new 380906176 bushing to prevent corrosion and ease future removal.
Press the bushing into the housing using a hydraulic press, ensuring it is aligned and goes in straight. The press fit interference (typically 0.02‑0.08 mm) will ensure the bushing does not rotate in the housing. After installation, the bushing should be flush or recessed by up to 0.5 mm from the housing face. Never leave the bushing protruding, as it may trap contaminants and cause binding. Before inserting the pin, lubricate the bushing bore with NLGI #2 lithium‑based grease. Rotate the pin inside the bushing to distribute the grease into the grooves.
Reconnect the tilt cylinder and torque the retaining bolt to the specification (typically 200‑250 N·m for M24 threads). Cycle the tilt cylinder through its full range of motion several times, then reapply grease until fresh grease emerges from the sides of the bushing. This initial greasing is critical to prevent dry start‑up wear. Record the installation date and hours in the machine’s service log.
Aftermarket tilt bushings are often manufactured from recycled bronze scrap with unknown composition. They may contain excessive lead, which makes them softer and accelerates wear, or have shrinkage porosity that weakens the structure. The genuine XCMG 380906176 is made from virgin, certified phosphor bronze with a proven chemical analysis. The quality control process ensures each bushing meets the required hardness, tensile strength, and dimensional accuracy. Unlike generic bushing suppliers, XCMG provides a 12‑month warranty and technical support.
Counterfeit bushings sometimes have the correct dimensions but lack the internal lubrication grooves or have them incorrectly positioned, resulting in poor grease distribution. The genuine XCMG bushing has machined grooves that are designed to align with the grease hole in the housing, ensuring that lubricant reaches the entire bearing surface. Additionally, the groove edges are deburred to prevent scraping of the pin during rotation. XCMG also offers a bushing installation kit with the proper driver tools for accurate, damage‑free pressing.
For fleet operators, standardising on genuine XCMG bushings simplifies inventory and ensures that every pivot joint has the correct clearance. A mismatched bushing – for example, one with a slightly larger ID – will cause play from the start, leading to rapid pin wear. The genuine bushing’s exact fit eliminates that risk. Protect your grader’s resale value; buyers prefer documented use of original parts in the tilt and circle drive systems.
Common signs that the tilt bushing requires replacement include: excessive radial play at the tilt cylinder pin (felt as a knock when shaking the blade), visible scoring or galling on the bushing ID after disassembly, difficulty in greasing (grease channels blocked), oil leakage from the pin seals, and reduced tilt‑holding ability (blade droops when engine is off). Also, if the pin shows abnormal wear patterns (scratches, oval shape), the bushing is likely worn beyond limits.
Preventive replacement is recommended every 5,000 operating hours for heavily loaded tilt cylinder pivots and every 8,000 hours for less critical applications. During routine service, check the bushing for play by placing a pry bar between the cylinder and the bracket. If you can see or feel any movement beyond 0.2 mm, replace the bushing immediately. Always replace the bushing and the pin together – a new bushing on an old, worn pin will wear rapidly.
Store spare bushings in a clean, dry area, preferably in the original sealed bag. Do not remove the light oil coating until installation. If the bushing has been stored for over 12 months, inspect for “bronze disease” (green powdery corrosion) – though rare with genuine XCMG material – and clean with a mild solvent if necessary. Never use abrasive cleaning methods that could damage the precision surface.
The 380906176 Tilt Bushing 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 repairs. Bulk orders (10+ bushings) receive volume discounts and can be shipped via sea freight.
Each bushing is individually wrapped in VCI paper and foam‑packed in a reinforced carton to protect the machined surfaces. Traceability labels and installation instructions are included. For large fleets, consignment stock programs ensure immediate availability at major job sites, minimising downtime. XCMG also provides technical support for selecting the correct bushing size for non‑standard applications.
Order the genuine XCMG 380906176 Tilt Bushing today and restore your motor grader’s tilt cylinder precision and durability. Whether you are rebuilding the circle drive linkage or replacing a worn tilt pin bushing, XCMG delivers the quality and fit you expect. Don’t risk premature failure with unknown bronze – choose XCMG original.
Upgrade your motor grader’s reliability with XCMG genuine tilt bushings. Engineered for low friction, high impact resistance, and long wear life – order the 380906176 now and experience the durability that keeps graders productive worldwide.
