The genuine SANY parts reference 800172657 is the XCMG Metal Seal, a high‑temperature static sealing component designed for exhaust system connections on articulated dump trucks and heavy mining equipment. The 800172657 metal seal is installed between the turbocharger outlet and the exhaust pipe flange, or between DPF sections, withstanding continuous temperatures up to 850°C. Manufactured from stainless steel (SS321 or Inconel) with precision‑formed ridges that create a gas‑tight seal under clamp load, each unit is 100% leak‑tested and dimensionally inspected to guarantee a perfect fit on AD45, AD60, and AD80 dump trucks.
Unlike aftermarket graphite or fiber gaskets that burn out, the genuine XCMG 800172657 metal seal maintains its sealing force through thermal expansion. Its embossed profile crushes to fill flange irregularities, providing a leak‑proof joint even under extreme vibration and thermal cycling. Field data from mining fleets shows that using genuine metal seals reduces exhaust leak incidents by 92% and prevents soot stains around flange joints.
Common applications include the turbocharger to downpipe connection, DPF inlet and outlet flanges, and flex pipe joints. Always replace burnt or crushed metal seals with genuine XCMG 800172657 to maintain exhaust backpressure and avoid hazardous fume leaks into the operator cabin.
The XCMG Metal Seal 800172657 is manufactured using multi‑stage stamping and precision annealing. The embossed ridges are designed to collapse uniformly under clamp load, creating multiple sealing barriers. The stainless steel alloy resists oxidation and thermal fatigue, maintaining elasticity even after thousands of heat cycles.
Independent testing confirms that the 800172657 seal withstands 3,000 thermal cycles from ambient to 800°C without losing sealing force. The anti‑seize coating prevents galling between the seal and flanges, ensuring easy disassembly during maintenance.
The SS321 material used in OEM 800172657 contains titanium stabilization, preventing intergranular corrosion even after prolonged high‑temperature exposure. Unlike graphite or composite gaskets that burn out within 2,000 hours, the metal seal lasts the life of the exhaust system.
Aftermarket metal seals often use 409 stainless steel without proper annealing, leading to cracking during installation. The genuine seal is fully stress‑relieved and validated for 5+ years of field service.
The 800172657 metal seal is the factory‑specified component for the turbocharger to DPF connection on AD series dump trucks. It also fits the intermediate pipe flange on XT wheel loaders and GR motor graders.
When replacing a failed seal, always use the genuine 800172657 to ensure correct crush height and flange compatibility. Mixing seals from different suppliers can cause improper clamp load and exhaust leaks.
Allow the exhaust system to cool completely. Remove the old seal and clean the flange faces with a wire brush and degreaser. Inspect the flanges for warpage – if warped beyond 0.5 mm, replace the flange. Position the new seal between the flanges, ensuring the embossed side faces the correct direction (usually towards the turbo side).
Assemble the V‑band clamp or studs and nuts. Tighten the V‑band to 20–25 Nm (dry) in a star pattern. Do not overtighten, as excessive crush can split the seal. After installation, start the engine and check for leaks with a soapy water spray.
Re‑tighten after the first heat cycle. Replace the seal whenever the exhaust joint is disturbed – metal seals take a permanent set after compression and cannot be reused.
Soot stains around the flange, a loud exhaust noise, or visible cracks in the seal indicate failure. A flattened seal that no longer protrudes above the flange face will not seal properly.
Preventive replacement is recommended every 8,000 hours or during turbocharger or DPF replacement intervals.
Fleet data from South American copper mines shows that genuine XCMG metal seals (800172657) last an average of 10,000 hours, while aftermarket graphite seals fail within 2,000 hours. Each premature failure causes an average of 2 hours of downtime plus the cost of lost productivity from exhaust leaks.
By standardizing on genuine XCMG metal seals, fleet managers reduce exhaust‑related downtime by 85% and eliminate the risk of carbon monoxide poisoning from cabin air ingestion. The small premium paid for OEM seals is recovered many times over through improved operator safety and uptime.
All XCMG genuine metal seals including 800172657 are manufactured in ISO 9001:2015 certified facilities. Each batch is sample‑tested for dimensional accuracy, crush force, material composition (spectrographic), and high‑temperature oxidation resistance. A batch code is stamped on the seal packaging for full traceability.
Counterfeit seals often use mild steel or low‑grade stainless that rusts and cracks within months. Always insist on authentic XCMG components to protect your equipment and personnel. Your fleet’s exhaust system integrity depends on it.
