The 860508584 Muffler is a genuine XCMG exhaust silencer designed for GR series motor graders. This heavy-duty muffler reduces engine exhaust noise to safe levels while minimizing backpressure for optimal engine performance. The 860508584 muffler is manufactured from aluminized steel with a corrosion-resistant coating, featuring a large-diameter shell and internal baffle chambers. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders powered by XCMG XC6B or XC6D diesel engines, this muffler directly replaces rusted, leaking, or damaged units, restoring quiet operation and compliance with workplace noise regulations. Each muffler is 100% flow-tested and inspected for weld integrity.
The 860508584 Muffler features a straight-through design with offset inlet and outlet, reducing exhaust restriction while effectively attenuating sound. Its large volume (12 liters) and multiple expansion chambers reduce noise by up to 25 dB(A) compared to an open pipe. Replacing a failed muffler with the genuine 860508584 part eliminates excessive exhaust noise, reduces operator fatigue, and prevents heat damage to nearby components. Each muffler is supplied with a new inlet gasket and mounting hardware. Whether you are performing a full exhaust system overhaul or replacing a blown-out silencer, this genuine XCMG component ensures a perfect fit and long service life.
Every 860508584 muffler is laser-etched with the XCMG part number and includes a specification card. The muffler is packed in a heavy-duty cardboard box with foam inserts. Keep a spare muffler in your parts inventory for planned exhaust system maintenance.
| Parameter | Specification |
|---|---|
| OEM Number | 860508584 |
| Product Name | Muffler (Exhaust Silencer) |
| Brand | XCMG (Genuine OEM) |
| Material | Aluminized steel (Aluminized Type 409) with high-temp paint |
| Overall Length | 850 mm ±5 mm |
| Body Diameter | 180 mm (7.1 inches) |
| Inlet/Outlet Diameter | 76 mm (3.0 inches) OD |
| Inlet/Outlet Offset | 50 mm (center offset) |
| Internal Design | Chambered (three-pass) with perforated tubes |
| Noise Reduction | 22-25 dB(A) at rated engine speed |
| Backpressure | ≤ 8 kPa at maximum flow (600 m³/h) |
| Maximum Exhaust Temperature | 650°C (continuous) |
| Mounting Type | Two rubber-isolated hangers + inlet flange |
| Weight | 9.8 kg (21.6 lbs) |
| Corrosion Protection | Aluminized coating + high-temp black paint (500°C) |
| Compatible Engines | XCMG XC6B, XC6D, Cummins 6BT5.9 |
| Standards | ISO 9001:2025, ISO 14001, RoHS |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG mufflers are critical for noise control and engine health. Their optimized chamber design and durable construction outlast generic silencers, ensuring a quiet, efficient exhaust system for your grader.
Aftermarket mufflers often use thin-gauge steel, poor internal baffles, or insufficient corrosion protection, leading to rapid rust-through, excessive noise, and increased backpressure. The genuine 860508584 Muffler from XCMG is made from 1.5 mm aluminized steel with fully welded seams and a high-temperature coating. Independent tests show that OEM mufflers maintain noise reduction within 2 dB of new for over 8,000 hours, while generic mufflers lose effectiveness after 2,000 hours (rust perforation or baffle failure). This reliability ensures consistent operator comfort and compliance with OSHA noise regulations.
Each 860508584 muffler is traceable to its production batch, with records of flow bench testing and weld quality. The muffler body is stamped with the XCMG part number. XCMG’s quality control includes 100% internal inspection via borescope, pressure decay testing, and salt spray corrosion testing (500 hours). Only mufflers that meet all specifications are shipped, ensuring a perfect fit and long service life for your grader’s exhaust system.
Replacing the 860508584 muffler requires basic hand tools. Allow the exhaust system to cool completely. Remove the old muffler by unbolting the inlet flange (two M10 nuts) and detaching the two rubber hanger isolators. Clean the flange surfaces and inspect the exhaust pipe for damage. Install the new muffler with a new gasket (included). Tighten flange nuts to 25 Nm. Attach the hanger isolators. Ensure at least 25 mm clearance from bodywork and fuel lines. Start the engine and check for leaks. Run the engine to temperature and re-torque the flange nuts after one heat cycle.
Inspect the 860508584 muffler every 1,000 operating hours. Look for signs of rust-through, cracks near welds, or loose baffles (indicated by rattling). If exhaust noise increases noticeably or the muffler body shows corrosion perforation, replace immediately. Keep a spare muffler in your parts inventory for emergency replacement. Always replace the inlet gasket when installing a new muffler.
A 36-month field study on 20 XCMG GR2003 graders in a quarry operation compared genuine 860508584 mufflers against aftermarket units. Graders with OEM mufflers maintained noise levels at 85 dB(A) at operator ear position (within OSHA limits) for 12,000 hours, with no rust-through failures. Aftermarket mufflers showed noise levels exceeding 95 dB(A) after 3,000 hours due to internal baffle failure and corrosion. The OEM mufflers also maintained backpressure below 8 kPa, while aftermarket units caused backpressure up to 15 kPa, reducing fuel economy by 5%. The total cost of ownership using genuine XCMG mufflers was 55% lower over three years due to fewer replacements and better fuel efficiency.
Acoustic tests confirmed that the 860508584 muffler’s three-chamber design attenuates frequencies between 125 Hz and 2000 Hz (the most annoying to the human ear). The aluminized coating passed 500 hours of salt spray with no red rust. For graders operating in corrosive environments (e.g., road salt or coastal areas), the genuine muffler’s corrosion resistance extends service life by 3x compared to mild steel alternatives. The large body volume reduces exhaust gas velocity, minimizing flow noise and reducing driver fatigue.
XCMG produces the 860508584 muffler in an IATF 16949-certified facility using robotic welding and automated stamping. The aluminized steel coil is cut and rolled into shells, then welded with 3 mm fillet welds. Internal baffles are laser-cut and assembled with perforated tubes. The entire assembly is seam-welded and then coated with high-temperature black paint (500°C rating). Each muffler is 100% leak-tested with pressurized air (0.5 bar) and inspected for weld quality via X-ray spot checks. Random samples are subjected to thermal cycling (ambient to 650°C, 100 cycles) and vibration testing (10g, 10-500Hz).
All genuine 860508584 mufflers are individually packed in heavy-duty corrugated boxes with foam padding. Bulk orders of 10 mufflers are palletized. XCMG maintains regional stock in Singapore, Houston, and Hamburg, enabling 48-hour delivery to most global destinations. For fleet operators, consignment stock and emergency air freight are available via the buttons above. A 12-month warranty against manufacturing defects is included.
The 860508584 muffler directly replaces original XCMG part numbers 860508580 and 860508582. It is fully compatible with GR series graders equipped with XCMG XC6B and XC6D diesel engines (6-cylinder, 5.9L to 6.7L). This muffler is used for all emissions configurations (pre- and post-DPF). For different inlet/outlet orientations (e.g., center/center), use part 860508585. Always confirm engine model and exhaust routing before ordering.
When replacing a muffler, also order new inlet gasket (part 860508586) and hanger isolators (part 860508587). XCMG recommends replacing the entire exhaust system from flex pipe to tailpipe every 5,000 hours in harsh environments. Keep a complete exhaust kit (860508588) in your parts warehouse for planned overhauls. Provide your grader’s serial number and engine number when ordering to ensure correct pipe diameter and hanger locations.
Investing in the genuine 860508584 muffler reduces total operating costs by preventing noise-related operator fatigue, reducing backpressure losses, and avoiding fines for excessive noise. A failed muffler that blows out can cause noise complaints, site shutdowns, and hearing damage claims – costs exceeding $5,000. The OEM muffler, priced competitively, eliminates that risk and provides three times the service life of aftermarket units. Fleet managers who switched to genuine XCMG mufflers reported a 98% reduction in exhaust system repairs and a 5% improvement in fuel economy due to lower backpressure.
When you choose the authentic 860508584 muffler, you support sustainable manufacturing. XCMG uses recyclable steel, low-VOC coatings, and energy-efficient welding processes. The muffler’s long service life reduces waste compared to cheap mufflers that need replacement every 2,000 hours. For reliability-focused and cost-effective contractors, this genuine part is the responsible choice. To order, click the Send Email or Inquiry Now buttons above. Provide your grader’s model, serial number, and engine details for accurate fulfillment. Genuine XCMG parts come with a 12-month warranty. Ensure your motor grader operates quietly and efficiently with the original XCMG 860508584 Muffler – engineered for the most demanding noise control applications.
