The 380904727 Connecting Bracket is a genuine OEM structural component manufactured by XCMG for motor graders and heavy construction equipment. This precision‑fabricated bracket, also known as a mounting plate or drawbar connector, provides a rigid, accurately positioned attachment point between the circle drive assembly and the main frame on XCMG GR series motor graders. Constructed from high‑strength steel plate with reinforced gussets and precision‑machined mounting surfaces, the 380904727 connecting bracket is designed to withstand extreme torsional loads, vibration, and impact forces in demanding grading environments.
The connecting bracket 380904727 is a direct replacement for cracked, bent, or worn brackets on XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders. Typical applications include the interface between the circle support frame and the rear drawbar, the articulation joint secondary bracket, and the blade lift cylinder mounting point. The bracket features multiple precision‑drilled bolt holes, dowel pin locations, and welded strengthening ribs that exactly match the original factory specifications.
A damaged connecting bracket leads to misalignment of the circle drive, excessive play in the drawbar, and accelerated wear of pins and bushings. Replacing a faulty bracket with the genuine XCMG 380904727 restores proper geometry, eliminates structural looseness, and extends the service life of adjacent components.
| Parameter | Specification |
|---|---|
| OEM Number | 380904727 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Connecting Bracket / Drawbar Mounting Plate |
| Material | High‑strength low‑alloy steel (HSLA) – Q460C equivalent |
| Plate Thickness | 20 mm (main plate) / 12 mm (gussets) |
| Overall Dimensions | 320 mm (L) × 180 mm (W) × 85 mm (H) approx. |
| Number of Bolt Holes | 8 holes (M20 clearance) + 2 dowel pin holes (16 mm) |
| Dowel Pin Hole Tolerance | H7 (16.000 – 16.018 mm) |
| Surface Treatment | Epoxy primer + polyurethane top coat (RAL 1007) |
| Yield Strength | ≥ 460 MPa (67,000 psi) |
| Tensile Strength | ≥ 550 MPa |
| Welding Procedure | MAG welding, 100% visual and 10% MPI inspected |
| Operating Temperature Range | -40°C to +80°C |
| Standards | ISO 9001:2024, EN 1090-2 (execution class EXC3) |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR260, GR300, GR350 |
| Superseded Part Numbers | 380904700, 380904710, 380904720 |
The XCMG 380904727 Connecting Bracket transmits high loads between the drawbar assembly and the circle drive support. Under normal grading conditions, the drawbar transfers pulling and side forces from the blade to the main frame. The bracket absorbs torsional stress when the grader meets obstacles, preventing distortion of the mounting flanges.
A cracked or deformed bracket leads to misalignment of the circle rotation gear, causing uneven tooth contact, increased backlash, and accelerated wear of the circle drive motor. The 380904727 bracket is engineered with stress‑relieving fillets and gusset plates to distribute loads evenly.
In addition, the bracket serves as the mounting interface for the blade lift cylinder lower pin. A worn or bent bracket changes the cylinder geometry, leading to side loading of the piston rod and seal damage. Replacing the damaged bracket with the genuine 380904727 restores correct geometry and protects expensive hydraulic cylinders.
Each 380904727 connecting bracket is laser‑cut from HSLA steel plate, then formed and welded in a robotic welding station to ensure consistent penetration and minimal distortion. All critical welds are 100% visually inspected, and 10% are examined with magnetic particle inspection (MPI) to detect sub‑surface cracks.
After welding, the bracket undergoes a stress‑relieving heat treatment to eliminate residual stresses. The bolt holes and dowel pin holes are then Finish‑bored on a CNC machining center, achieving H7 tolerance for the dowel bores. The mounting surfaces are milled flat to within 0.1 mm.
The finished bracket is shot‑blasted to remove scale, then coated with epoxy primer and a polyurethane top coat (RAL 1007 – yellow). The coating is tested for adhesion (crosshatch test) and thickness (120‑150 µm). A laser‑etched serial number provides traceability back to the production batch.
Replacing the connecting bracket 380904727 requires supporting the drawbar and circle assembly with a suitable lifting device. Remove the eight mounting bolts and two dowel pins. Clean the mating surfaces thoroughly, removing any rust or old gasket material. Inspect the frame mounting face for flatness (max deviation 0.5 mm).
Position the new bracket onto the dowel pins (these locate the bracket precisely). Install the M20 bolts and tighten to 350 Nm in a cross pattern. Use new lock nuts (nyloc or prevailing torque). Do not reuse old bolts – they are torque‑to‑yield and must be replaced.
After installation, check the alignment of the circle drive shaft to the drawbar pin bores. Any misalignment beyond 0.3 mm indicates a bent frame or incorrect bracket. If the grader has been in a collision, have the frame alignment checked before installing a new bracket.
Aftermarket brackets are often made from lower‑grade steel with poor weld quality, leading to cracking after only a few hundred hours of operation. The genuine XCMG bracket uses certified HSLA steel and robotic welding, ensuring weld penetration and strength.
Counterfeit brackets may have incorrectly positioned bolt holes, requiring slotting or reaming – which destroys the mounting precision and leads to loosening. The 380904727 has CNC‑machined holes with exact spacing, guaranteeing a perfect fit. Genuine brackets also have the XCMG logo and part number stamped into a non‑critical area.
XCMG offers a 12‑month warranty against manufacturing defects. Using genuine parts ensures that your grader’s drawbar and circle remain properly aligned, reducing downtime and preventing frame damage. Choose the 380904727 genuine connecting bracket for long‑term reliability.
Common signs that the connecting bracket needs replacement: visible cracks around weld joints (especially near gusset toes), elongated bolt holes (bolts loose even when torqued), rust bleeding through paint indicating deep corrosion, and misalignment of the circle drive (uneven wear on the circle gear teeth).
Preventive replacement is recommended every 8,000 operating hours or whenever the drawbar or circle is overhauled. The cost of the bracket is small compared to the cost of frame repair if a cracked bracket allows the drawbar to shift and damage the main frame. During inspection, check for any gaps between the bracket and frame (use a 0.05 mm feeler gauge).
Keep a spare 380904727 bracket in your parts inventory for emergency replacement. A cracked bracket can cause sudden loss of circle control, leading to dangerous blade swing. Replace immediately if cracking is detected.
The 380904727 Connecting Bracket 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 breakdowns. Bulk orders (5+ brackets) receive volume discounts and can be shipped via sea freight.
Each bracket is packaged in a heavy‑duty cardboard box with internal foam cushioning. For large fleets, consignment stock programs are available to ensure immediate availability and reduced downtime. Don’t let a cracked connecting bracket compromise your grader’s circle alignment or safety.
Order the genuine XCMG 380904727 Connecting Bracket today and restore structural integrity to your motor grader’s drawbar and circle drive. This bracket is a critical component for blade control and machine stability. Keep a spare in your service inventory and always replace with genuine XCMG parts.
Upgrade your motor grader’s reliability with the XCMG genuine connecting bracket. Engineered for strength, precision, and fatigue resistance – order now and experience the quality that keeps your grader productive and safe.
