380901027 XCMG GR2605 motor grader muffler assembly

380901027 XCMG GR2605 motor grader muffler assembly

The XCMG GR2605 motor grader 380901027 muffler assembly is a key integrated component of the engine exhaust system. It includes the muffler body, flange interface, heat shield, and exhaust gas purification device. Manufactured strictly according to XCMG’s original factory design standards, dimensional accuracy, and process specifications, it is specifically designed for the Cummins QSB6.7 engine and suitable for harsh construction conditions with high dust, high temperature, and strong vibration, such as highway construction, airport construction, mining operations, and large-scale earthmoving. As the “noise reduction and purification center” of the engine exhaust, it is responsible for attenuating exhaust noise, reducing exhaust gas temperature, filtering some harmful particulate matter, and ensuring smooth exhaust without back pressure. This directly affects engine power output and cab operating comfort, making it a high-quality original factory replacement assembly for aging or damaged exhaust systems on the GR2605 motor grader.

This muffler assembly utilizes a composite structure of high-strength cold-rolled steel plate and heat-resistant stainless steel. The muffler body is formed by CNC bending and robotic welding, with continuous and full welds that have undergone pressure testing (pressure resistance ≥0.3MPa). It boasts high structural rigidity and excellent sealing performance, capable of withstanding high engine exhaust temperatures (temperature resistance ≤650℃) and vibration impacts over extended periods without easily deforming, cracking, or leaking. Internally, it employs a multi-stage baffle-type sound-absorbing structure, coupled with a sound-absorbing cotton filling layer. Through the triple noise reduction principles of sound wave reflection, interference, and absorption, it can attenuate exhaust noise by 25-35dB(A), significantly reducing noise pollution in the cab and surrounding environment. The airflow channel is optimized for fluid dynamics, resulting in low exhaust resistance without affecting engine intake efficiency and power output, ensuring stable operation of rated power.

The muffler surface is equipped with a factory-designed heat shield made of high-temperature resistant aluminum alloy, which effectively blocks high-temperature conduction to prevent burns to operators and reduces heat radiation damage to surrounding pipes and wiring harnesses. Internally, it integrates an exhaust gas purification and filtration device that filters particulate matter and impurities from the exhaust, further optimizing exhaust emission standards in conjunction with the engine aftertreatment system. The flange interface is forged from thickened carbon steel and CNC machined to ensure a flatness error of ≤0.02mm, ensuring a precise fit with the engine exhaust manifold interface. It is equipped with a factory-designed high-temperature resistant sealing gasket for a tight, leak-free seal. All welded joints undergo high-temperature rust prevention treatment, and the exterior is coated with a double layer of high-temperature rust-proof paint, resisting oxidation and mud/water corrosion, making it resistant to rust and paint peeling during long-term outdoor operation. The product’s mounting bracket, bolt hole positions, and piping routing are completely consistent with the original design of the XCMG GR2605 motor grader. It precisely matches the connection interfaces of the exhaust manifold and aftertreatment device, and comes with complete installation accessories (flange bolts, gaskets, heat shield fixing clips). No cutting, welding, or hole modification is required; it can be directly installed as a whole, making assembly and disassembly convenient and efficient. After installation, it exhibits strong synergy with the vehicle’s exhaust system, ensuring smooth exhaust without back pressure, quickly restoring the engine’s exhaust noise reduction and purification performance, and guaranteeing stable equipment operation.

Core Technical Parameters

Part Model: 380901027
Part Name: Muffler Assembly (including muffler body, heat shield, and purification device)
Applicable Model: XCMG GR2605 motor grader
Compatible Engine: Cummins QSB6.7 Turbocharged Intercooled Engine
Materials: High-strength cold-rolled steel plate, heat-resistant stainless steel, high-temperature resistant aluminum alloy heat insulation cover, carbon steel forged flange
Processes: CNC bending, robotic welding, pressure testing, high-temperature rust prevention treatment
Features: High-efficiency noise reduction, smooth exhaust, high-temperature resistance and vibration resistance, tight sealing, corrosion resistance and durability
Functions: Exhaust noise reduction, exhaust gas cooling, particulate matter filtration, ensuring smooth exhaust, heat radiation protection

Core Advantages

Precisely compatible with original factory standards, no modification required for installation; multi-stage silencing structure for significant noise reduction; high-temperature resistant composite materials to adapt to harsh operating conditions; tight seal with no air leakage, minimal power loss; easy installation, quickly restores exhaust system performance, and reduces maintenance costs.

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1 380900985 Exhaust Pipe
2 805046416 Bolt M10×30 GB/T5783-2000
3 329900302 Thickened Flat Washer WT041.01030
4 805201420 Nut M10 GB/T6170-2000
5 380904867 Connecting Pipe
6 805049185 Bolt M8×55 GB/T5783-2000
7 380901027 Muffler Assembly
8 801907068 T-Type Clamp φ81
9 380905700 Muffler Bracket
10 805238372 Nut M12 BOLT M12×40
11 329900303 Thickened flat washer PLATE WT041.01240
12 805006287 Bolt M12×40 BOLT GB/T5783-2000
13 380900986 Pipe clamp
14 329900301 Thickened flat washer WT041.00820
15 805238378 Nut M8 GB/T6170-2000

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