The 380501077 Spacer Plate is a genuine OEM precision shimming component manufactured by XCMG for motor graders and heavy construction equipment. This machined spacer plate provides accurate gap filling, alignment correction, and load distribution between structural components on XCMG GR series graders.
Engineered from high‑strength steel with a corrosion‑resistant finish, the 380501077 spacer plate is designed to withstand extreme static and dynamic loads, vibration, and environmental exposure. It directly replaces worn, deformed, or missing spacer plates in blade lift linkages, ripper mounts, and chassis connections.
Each unit is precision ground to exact thickness tolerances (±0.05 mm) and features deburred edges and accurate bolt hole patterns. The spacer plate ensures proper preload of fasteners, eliminates play in pinned joints, and prevents premature wear of mating components.
| Parameter | Specification |
|---|---|
| OEM Number | 380501077 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Precision Spacer Plate / Shimming Plate |
| Material | High‑strength carbon steel (C45 / 1045) |
| Surface Finish | Zinc plating + yellow chromate (500h salt spray) |
| Thickness | 6.0 mm (±0.05 mm tolerance) |
| Overall Dimensions (L×W) | 120 mm × 80 mm (4.72″ × 3.15″) |
| Bolt Hole Pattern | 4 holes, M12 diameter, 90 mm × 55 mm spacing |
| Hardness (Rockwell) | HRC 28‑32 (through hardened) |
| Flatness | ≤ 0.05 mm across entire surface |
| Compressive Strength | > 600 MPa (87,000 psi) |
| Operating Temperature Range | -40°C to +120°C |
| Weight (each) | 0.35 kg (0.77 lbs) |
| Corrosion Resistance | 500+ hours salt spray (ASTM B117) without red rust |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 380501001, 380501045, 380501066 |
| Certifications | ISO 9001:2015, ISO 14001 |
The XCMG 380501077 Spacer Plate is a seemingly simple but vitally important component in your motor grader’s mechanical assembly. It is used between mating surfaces to fill gaps, adjust alignment, and ensure that bolted joints achieve proper preload. Without the correct spacer, fasteners can loosen under vibration, leading to accelerated wear, misalignment, and even structural failure.
Typical applications include mounting the blade lift cylinder brackets, ripper support frames, cab isolator mounts, and transmission support crossmembers. The 380501077 spacer plate provides a solid, non‑compressible interface that distributes clamping force evenly, preventing deformation of softer materials and maintaining precise geometry.
When original spacer plates become corroded, bent, or crushed, replacing them with genuine XCMG parts restores factory specifications. Using a deformed or undersized spacer can cause bolt preload loss, leading to joint slippage, noise, and eventual component damage. The 380501077 is designed to outlast the original machine.
Each 380501077 spacer plate is produced on CNC grinding machines that maintain flatness within 0.05 mm. After hardening to HRC 28‑32, the plates are double‑disc ground to achieve the exact 6.0 mm thickness with a ±0.05 mm tolerance. This precision ensures that when used in a stack of multiple spacers, the total height is predictable and repeatable.
The bolt holes are drilled and reamed to a precise diameter (12.2 mm for M12 bolts) with a positional tolerance of ±0.1 mm. This prevents binding during assembly and allows the bolts to carry shear loads evenly. All edges are chamfered or radiused to eliminate stress risers and prevent injury during handling.
XCMG subjects each batch to hardness testing, flatness verification, and salt spray testing. The zinc plating with yellow chromate provides sacrificial corrosion protection, and the plate will show white rust before red rust, giving visible warning of environmental attack.
Installing the 380501077 spacer plate is straightforward. Clean both mating surfaces of old gasket material, dirt, and rust. Position the spacer plate over the bolt holes. Apply a thin film of anti‑seize compound to the bolt threads (unless otherwise specified by XCMG). Insert bolts and torque to the value specified in the service manual (typically 85 Nm for M12 grade 10.9 bolts).
Never use more than one spacer plate if a single plate is specified; stacking multiple plates can reduce clamping stability. If a larger gap exists, use a thicker genuine XCMG spacer (other thicknesses are available). Always replace all bolts when installing a new spacer, as old bolts may have stretched.
After torquing, re‑check the torque after 100 operating hours, as initial settling may occur. If the joint loosens, inspect the spacer for compression or deformation. The hardened 380501077 plate will not crush, indicating that the bolts or mating surfaces are the issue.
Aftermarket spacer plates are often made from low‑grade mild steel that is not heat‑treated. These soft plates can compress over time, reducing bolt preload and causing joint loosening. The genuine XCMG spacer is through‑hardened to HRC 28‑32, providing long‑term dimensional stability under high clamping forces.
Counterfeit spacers may have incorrect hole patterns, requiring drilling that weakens the plate. The 380501077 matches the original bolt pattern exactly. Additionally, aftermarket plates often lack proper corrosion protection, leading to rust jacking and fastener seizure. XCMG’s zinc plating meets OEM standards for salt spray resistance.
XCMG provides a 12‑month warranty against manufacturing defects. Each spacer plate is stamped with the XCMG logo and part number. This supersedes older numbers 380501001 and 380501045, with improved flatness and corrosion resistance.
Common indicators that a spacer plate needs replacement: visible rust or pitting, deformation (bending or cupping), corrosion under the plating, or bolt holes that have become elongated. Also, if you notice recurring bolt loosening or audible clicking from a bolted joint, the spacer may have lost its thickness due to wear or corrosion.
Preventive replacement every 8,000 operating hours is recommended for spacers in high‑corrosion environments (road salt, mining chemicals, coastal areas). The cost of a genuine spacer plate is minimal compared to the cost of repairing a failed structural joint or replacing a bent component.
When performing major overhauls (e.g., blade lift cylinder rebuild, transmission removal), always replace all spacer plates that are removed. Old spacers may have taken a set and will not provide the same clamping force when reused. Keep a stock of 380501077 plates in your parts inventory.
The 380501077 Spacer Plate 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+ pieces) receive volume discounts and can be shipped via sea freight. Each spacer plate is individually wrapped in anti‑corrosion paper and boxed. For large fleets, consignment stock programs are available to ensure immediate availability.
Don’t let a missing or worn spacer plate compromise your grader’s structural integrity. Order the genuine XCMG 380501077 Spacer Plate today and ensure every bolted joint remains tight, aligned, and durable.
The 380501077 Spacer Plate is a testament to XCMG’s attention to detail in heavy equipment design. While small, it plays a huge role in maintaining precision alignment and fastener preload. Keep spare plates in your service truck for field repairs, and always replace with genuine XCMG parts.
Upgrade your motor grader’s reliability with the XCMG genuine spacer plate. Engineered for strength, precision, and longevity – order now and experience the quality that keeps your grader productive.
