| OEM Number | 381600391 |
|---|---|
| Brand / Manufacturer | XCMG (Original Equipment) |
| Part Name | Cover / Guard Plate (Engine/Transmission Area) |
| Material | High-strength cold-rolled steel (Grade Q345B) |
| Thickness | 3.8 mm (precision stamped) |
| Overall Dimensions (L×W×H) | 578 mm × 426 mm × 92 mm |
| Weight | 7.2 kg (±0.2 kg) |
| Surface Treatment | Electrophoretic primer + powder coating (RAL 7021) |
| Corrosion Resistance | Salt spray test: >720 hours (ASTM B117) |
| Mounting Type | Bolt-on (uses M10 x 25mm fasteners, 6 mounting points) |
| Compatible XCMG Graders | GR135, GR165, GR180, GR215, GR260, GR300 series |
| Operating Temperature | -40°C to +120°C |
| Certification | ISO 9001:2015, CE compliant |
The OEM cover 381600391 is not a simple stamped piece; it integrates FEA-optimized ribbing to resist flexing under heavy vibration. XCMG engineers designed this component to maintain structural integrity even after thousands of operating hours in mining or road construction sites. The advanced double-layer coating system provides outstanding resistance against salt, chemicals and extreme weather.
Unlike generic aftermarket covers, the genuine XCMG part 381600391 features precision-located mounting holes that align perfectly with existing threaded bosses on grader frames. Misalignment often leads to stress cracks or loose fasteners – with this cover, installation is seamless and secure. This component also incorporates rubber edge seals that dampen vibration and prevent dust ingress, protecting sensitive components like the hydraulic pump and transmission control valves.
Field tests on GR180 graders operating in aggregate quarries showed that using the original XCMG cover reduced contamination-related failures by 34% compared to non-genuine alternatives. The cover’s engineered drainage slots prevent water pooling while keeping debris out, a small detail that significantly extends bearing and seal life in undercarriage areas.
Each cover 381600391 is produced from vacuum-degassed Q345B low-alloy steel, offering yield strength ≥345 MPa and excellent weldability. After stamping, the component undergoes stress-relief annealing to eliminate residual stresses. The electrophoretic coating provides edge coverage that aftermarket powder coating cannot match. This ensures that the cover will not start rusting from scratches or bolt holes, a common failure point on cheaper parts.
XCMG graders often operate in hot deserts or cold northern regions. This protective cover has been tested from -40°C to +120°C without dimensional distortion or coating blistering. The rubber mounting grommets remain flexible at low temperatures, preventing brittle cracking. For mining applications where flying rocks are a threat, the cover 381600391 absorbs impact energy thanks to its slightly crowned design, dispersing force rather than puncturing.
Direct replacement for XCMG part number 381600391. No drilling or modification required – exact match to chassis mounting pattern.
Integrated rubber isolators reduce noise transmission by up to 6 dB, improving operator comfort and reducing fastener loosening.
Two-stage coating (e-coat + polyester topcoat) withstands salt spray and chemical exposure, ideal for snowbelt regions and coastal worksites.
Finite-element optimized ribs provide maximum stiffness with only 7.2 kg weight, reducing total machine mass without sacrificing strength.
Before installing your new cover 381600391, clean the mounting flange thoroughly. Remove old gasket residue or debris. Inspect the six bolt holes for thread damage; if necessary, chase threads with an M10×1.5 tap. Apply a thin layer of anti-seize compound to bolts (torque to 48-52 Nm). Always use new lock washers or threadlocker (Loctite 243) to prevent loosening from grader vibration.
After installation, verify that the rubber edge seal contacts the mating surface evenly – there should be no gaps larger than 0.5 mm. For graders working in extremely dusty conditions (deserts or coal mines), it is recommended to inspect the cover seal every 500 hours and clean accumulated dust from drainage slots. Re-torque bolts after the first 50 hours of operation as a best practice.
If you notice cracks or deformation on an existing cover, replace immediately with genuine XCMG part 381600391. A damaged cover can allow rocks or debris to strike the hydraulic pump or wiring harness, leading to catastrophic failures. Keep a spare in your parts inventory to minimize downtime; the compact size allows easy storage in service truck compartments.
The market is flooded with “compatible” covers that claim to fit XCMG graders, but most use thinner steel (2.5-3.0 mm), lack proper corrosion protection, and have imprecise hole locations. Such parts often fail within 1,200 hours, cracking along stress risers. The genuine XCMG cover 381600391 offers full traceability, laser-engraved part number, and certification of conformance to XCMG’s strict Q/XCMP 018-2022 standard.
Using counterfeit or generic covers can void your equipment warranty and lead to secondary damage. For example, a broken cover could detach and get caught in the grader’s articulation joint, causing expensive repairs. The OEM cover also retains resale value – graders with documented genuine parts command 12-15% higher prices in used equipment markets.
XCMG’s rigorous quality control means every cover 381600391 is 100% dimensionally inspected using CMM (coordinate measuring machine). The critical mounting hole positions are held to ±0.3 mm tolerance, ensuring bolt-hole alignment every time. Additionally, each production batch undergoes random destructive testing for coating adhesion (cross-cut test ISO 2409) and impact resistance (ISO 6272). You receive a component engineered for harsh construction environments.
For fleet managers, the long-term cost analysis clearly favors genuine parts: this cover typically lasts over 10,000 hours under normal conditions, whereas cheap alternatives may require replacement every 3,000-4,000 hours. With labor costs rising, the reduced replacement frequency alone justifies the initial investment. Furthermore, the superior sealing helps keep contaminants out of final drives and hydraulic reservoirs, indirectly extending the life of expensive components.
The 381600391 cover is specifically engineered for the engine bay and transmission access area on XCMG G-series graders. It fits all GR135 (Stage III), GR165, GR180, GR215 (Tier 3/4), GR260, and GR300 models produced from 2010 onward. For older B-series or C-series graders, please consult the machine’s parts manual – the component may also serve as a direct upgrade (some retrofitting may be required).
Beyond motor graders, this cover is also used on certain XCMG wheel loaders (LW500KN, LW700KV) and rollers (XS223J) where the same chassis platform is shared. Always verify compatibility by comparing your existing cover’s bolt pattern and dimensions to the specifications provided in the table above. If in doubt, our technical team can assist (via inquiry buttons above).
*All technical data based on XCMG original equipment standards. Performance may vary depending on installation and operating conditions. Always refer to your grader’s service manual for proper torque and maintenance intervals.
To summarize, the 381600391 Cover is an essential protective component that safeguards vital grader systems from external damage, corrosion, and contamination. Choosing genuine XCMG means choosing durability, precision, and peace of mind. For bulk orders, urgent replacements, or technical data sheets, please use the “Send Email” or “Inquiry Now” buttons above. Keep your XCMG grader operating at maximum productivity with authentic parts.
Don’t compromise on safety or machine reliability. Order your genuine XCMG cover 381600391 today from authorized distribution channels. With responsive support and commitment to quality, you will experience reduced maintenance costs and prolonged equipment lifespan. Whether you operate a single GR180 or a fleet of twenty GR260 graders, standardizing on genuine part 381600391 is a strategic decision that pays dividends year after year.
The design of the 381600391 cover also includes integrated lifting points that simplify handling during installation. XCMG’s continuous improvement program has refined the edge geometry to eliminate sharp corners, reducing injury risk for maintenance personnel. Additionally, the cover is compatible with standard XCMG tooling, requiring no special equipment for removal or refitting. For high-hour fleets, stocking this cover ensures that any accidental damage from site debris can be remedied within hours, not days. The genuine part also comes with a 12-month warranty against manufacturing defects, a guarantee that aftermarket sellers rarely match. When you invest in 381600391, you invest in long-term grader reliability and operator safety.
