The genuine XCMG Ts piston ring set 800172295 is a premium engine sealing solution specifically engineered for the Mercedes‑Benz OM460LA diesel engine that powers XCMG articulated dump trucks. This piston ring set – comprising compression rings and oil control rings – provides exceptional cylinder sealing, combustion gas containment, and oil consumption control under extreme mining conditions. Manufactured from high-grade nodular cast iron and advanced steel materials, the 800172295 Ts piston ring set delivers outstanding wear resistance, conformability, and thermal stability at operating temperatures up to 350°C.
Engineered to withstand peak cylinder pressures exceeding 220 bar, the 800172295 piston ring set features a duplex top ring with chromium‑ceramic coating (hardness 800–1000 HV), a second taper‑faced ring, and a three‑piece oil control ring assembly with spiral expander. The ring profiles are optimised to minimise blow‑by, reduce friction, and maintain stable oil consumption throughout the engine’s overhaul interval of 12,000 hours. Each ring is precisely ground to a surface finish of Ra ≤0.2 µm, ensuring rapid break‑in and long‑term sealing integrity.
The 800172295 Ts piston ring set is fully compatible with XCMG articulated dump trucks including XDA30, XDA40, XDA45U, XDA60E, and XDA70 series. The XDA45U model is powered by a Mercedes‑Benz OM460LA inline 6‑cylinder turbocharged diesel engine delivering 360 kW (483 hp) at 1900 rpm and 2,300 N·m of torque at 1300 rpm, with a 128 mm bore. This high‑output engine demands piston rings that maintain stable sealing under heavy loads, frequent start‑stop cycles, and the severe vibration of 6×6 all‑wheel drive operation on 30° slopes.
The following table provides complete technical specifications for the XCMG 800172295 Ts piston ring set, meeting all original equipment manufacturer standards for the Mercedes‑Benz OM460LA engine in articulated dump truck applications.
| OEM Part Number | 800172295 (XCMG Genuine) |
|---|---|
| Product Name | Ts Piston Ring Set (Top Ring + Second Ring + Oil Ring) |
| Compatible Engine | Mercedes‑Benz OM460LA (6‑cylinder, 12.8 L, turbocharged diesel) |
| Cylinder Bore Diameter | 128.00 mm (OM460LA standard) |
| Ring Dimensions (Top / Second / Oil) | 3.00 mm / 2.50 mm / 4.00 mm (radial thickness) |
| Top Ring Material & Coating | Ductile cast iron (GGV) + chromium‑ceramic composite coating; hardness 800–1000 HV; barrel face profile |
| Second Ring Material | High‑strength grey cast iron, taper‑faced, phosphate coated |
| Oil Control Ring | Three‑piece assembly: two chrome‑plated steel rails + spiral expander |
| Ring Surface Finish | Ra ≤ 0.2 µm (precision ground and lapped) |
| Top Ring Hardness | 45–52 HRC (base material), coating 800–1000 HV |
| Axial Height (Top / Second / Oil) | 3.00 mm / 2.50 mm / 4.00 mm (±0.005 mm) |
| Ring Gap (Installed, Top/Second) | 0.35–0.55 mm (nominal), 0.45–0.65 mm (wear limit) |
| Oil Ring Gap (Rails) | 0.25–0.45 mm |
| Maximum Cylinder Pressure | 22 MPa (220 bar) peak firing pressure |
| Continuous Operating Temp | -40°C to +350°C (ring groove region) |
| Compression Ring Type | Keystone or rectangular section as per OM460LA design |
| Axial Float in Groove | 0.060–0.092 mm (top ring), 0.040–0.072 mm (second ring) |
| Oil Consumption (max) | ≤ 0.05% of fuel consumption |
| Blow‑By Limitation | ≤ 80 L/min at rated power (new engine) |
| Surface Treatment | Zinc‑phosphate coating + anti‑rust oil (corrosion protection ≥200h salt spray) |
| Compatible XCMG Models | XDA30, XDA40, XDA45U, XDA60E, XDA70 articulated dump trucks |
| Quality Certifications | ISO 9001:2015, 100% dimensional inspection, hardness & coating thickness verification |
| Recommended Replacement Interval | 10,000–12,000 operating hours (engine overhaul) |
| Warranty | 12 months against manufacturing defects |
The 800172295 Ts piston ring set utilises premium ductile cast iron for the top ring, offering excellent thermal conductivity and fatigue strength under high‑frequency combustion pulses. The chromium‑ceramic coating (Cr‑C) applied by plasma spray technology provides an extremely hard (800–1000 HV) and scuff‑resistant surface that protects the ring during the critical engine break‑in period and extends service life by up to 30% compared to conventional chrome rings. The barrel‑faced top ring profile ensures rapid oil film formation at the cylinder wall interface, minimising friction losses while maintaining effective gas sealing.
The second ring is manufactured from high‑strength grey cast iron with a taper‑face profile, designed to scrape excess oil from the cylinder wall and prevent oil migration to the combustion chamber. This ring is phosphate coated to promote initial seating and provide corrosion resistance. The three‑piece oil control ring features two chrome‑plated steel rails with a spiral expander that provides precise radial pressure distribution, ensuring consistent oil film thickness across the entire ring circumference. The expander maintains rail contact even under severe bore distortion caused by thermal expansion in heavy‑duty diesel engines.
Each piston ring is precision ground to a surface finish of Ra ≤0.2 µm and lapped to ensure flatness. The ring gaps are laser‑cut and deburred to eliminate stress risers. Quality control includes 100% inspection of axial height, radial thickness, free gap, and closed gap using computerised gauges. Sample rings from every batch are subjected to coating hardness testing (Vickers microhardness), adhesion tests, and metallographic examination to verify coating uniformity.
The OEM Ts piston ring set 800172295 is a direct replacement for the original piston rings in all XCMG articulated dump trucks equipped with the Mercedes‑Benz OM460LA engine. The XDA45U, a 41‑tonne payload articulated hauler, uses six of these ring sets (one per cylinder) to seal combustion gases and control oil consumption. The OM460LA engine features a bore of 128 mm and a stroke of 166 mm, with a compression ratio of 18:1 and peak firing pressures above 220 bar. The 800172295 ring set is designed to maintain compression pressure within 5% of new engine specifications even after 10,000 hours of operation.
The XDA40, XDA60E (55‑tonne electric drive), XDA30, and XDA70 all utilise the same OM460LA engine platform, making the 800172295 piston ring set a standardised component across the entire XCMG articulated hauler range. Field data from Australian iron ore mines and Indonesian coal operations shows that genuine XCMG ring sets achieve consistent blow‑by levels below 80 L/min and oil consumption rates under 0.05% of fuel usage over 12,000‑hour intervals. Aftermarket ring sets, in contrast, often suffer from premature scuffing, gap enlargement, and increased oil consumption after only 5,000‑6,000 hours, leading to excessive engine wear and costly downtime.
Proper installation of the 800172295 Ts piston ring set is critical for achieving maximum engine performance and longevity. Before installation, inspect the cylinder bores for taper, wear, or scoring. Hone the bores to a 45° cross‑hatch finish with a surface roughness of Ra 0.4–0.8 µm. Clean the bores thoroughly with soap and hot water, then oil with clean engine oil. Check the ring end gaps by inserting each ring into the bore and measuring the gap with a feeler gauge: top ring gap 0.35–0.55 mm, second ring gap 0.35–0.55 mm, oil ring rails gap 0.25–0.45 mm. Grind the ends if necessary, ensuring squareness.
Install the rings onto the piston using a ring expander tool, starting with the oil control ring expander, then the rails, then the second ring, and finally the top ring. Stagger the ring gaps at 120° intervals around the piston circumference, avoiding alignment with the piston pin axis. Lubricate the piston, rings, and cylinder bore with clean engine oil before assembly. When installing the piston into the bore, use a ring compressor and tap gently with a soft‑faced hammer. Never reuse old rings—always install a new 800172295 set.
After assembly, follow a strict break‑in procedure: start the engine and idle for 10 minutes, check for leaks. Then operate at low load (25% throttle) for 1 hour, varying engine speed between 1000 and 1500 rpm. Gradually increase load over the next 3 hours. Avoid prolonged idle or full‑throttle operation during the first 10 hours. Change the engine oil and filter after the first 50 hours of operation. Following this procedure ensures proper ring seating and maximises service life.
Laboratory validation of the 800172295 piston ring set followed ISO 6621 (piston ring test standards). High‑frequency wear testing (1,000 hours at 2,200 rpm, 75% load) showed top ring weight loss of only 0.08 g, second ring 0.04 g, and oil ring rails 0.03 g—well within OEM limits. Coating adhesion tested per ASTM C633 achieved >70 MPa. Blow‑by measurements remained under 50 L/min after the test, demonstrating exceptional sealing stability.
Field trials on XCMG XDA45U trucks in Chilean copper mines and Australian iron ore mines involved 15 vehicles over 12,000 operating hours. The genuine 800172295 rings maintained compression pressures within 8% of new engine values, oil consumption averaged 0.03% of fuel, and no ring sticking or scuffing was observed. Aftermarket ring sets tested in parallel showed blow‑by exceeding 150 L/min by 6,000 hours and oil consumption increased by 0.12% due to ring face wear and gap enlargement.
Corrosion resistance testing (ASTM B117) of the zinc‑phosphate coating protected the rings from red rust for over 200 hours, ensuring the rings remain corrosion‑free during storage in humid environments. Thermal cycle testing between -40°C and +350°C for 500 cycles caused no dimensional changes or coating delamination.
Aftermarket piston rings pose severe risks to engine reliability, performance, and operational cost. Non‑genuine rings often use inferior grey cast iron with poor wear resistance and incorrect metallurgy. Coatings may be absent or substandard (simple phosphate or flash chrome), leading to rapid scuffing and blow‑by. Ring gaps are frequently inconsistent, causing either excessive leakage or ring butting and breakage. The consequences include loss of compression (hard starting, reduced power), increased oil consumption (blue exhaust smoke, high oil cost), high blow‑by pressurising the crankcase (blown seals, oil leaks), and accelerated cylinder bore wear requiring expensive re‑boring or engine replacement—costing over $20,000 in parts and labour, plus extended downtime.
Genuine XCMG 800172295 piston rings offer full material traceability from certified foundries, documented heat treatment and coating parameters, 100% dimensional and hardness inspection, coating thickness verification, and a 12‑month warranty against manufacturing defects. Each ring set is batch‑tested for compliance with XCMG’s OEM specifications for axial height, radial thickness, end gap, hardness profile, coating composition, and surface finish. Using genuine XCMG piston rings preserves your engine warranty, ensures maximum combustion efficiency, and reduces total operating costs over the life of your articulated dump truck fleet.
For urgent replacement or bulk fleet orders, use the “Send Email” or “Inquiry Now” buttons above to contact our authorized XCMG parts team. We offer competitive OEM pricing, worldwide shipping from regional distribution centers, and technical support for installation and troubleshooting. Protect your XCMG articulated dump truck’s engine investment—choose only genuine OEM 800172295 Ts piston ring sets for reliable, long‑lasting performance in the toughest mining environments.
