The genuine XCMG drive gear 800172407 is a precision-engineered power transmission component used in the drivetrain of XCMG articulated dump trucks. This high‑strength drive gear efficiently transmits engine torque through the ZF 8WG310 automatic transmission and transfer case, delivering rotational power to the wheels. Manufactured from high‑quality alloy steel with induction‑hardened teeth, the 800172407 drive gear ensures reliable performance under extreme torque loads and harsh mining conditions.
Engineered to withstand torsional vibrations and high cyclic loads, the 800172407 drive gear features precision‑ground gear teeth (ISO 1328 grade 6) with a hardened surface of 55–60 HRC. The gear is manufactured from vacuum‑degassed 20MnCr5 case‑hardening steel, carburized to a depth of 0.8–1.2 mm, providing exceptional wear resistance while maintaining a tough, ductile core that absorbs shock loads. The gear is dynamically balanced to G6.3 quality grade to minimize vibration and reduce drivetrain noise.
The 800172407 drive gear is fully compatible with XCMG articulated dump trucks including the XDA30, XDA40, XDA45U, XDA60E, and XDA70 series. The XDA45U model features a Mercedes‑Benz OM460LA inline 6‑cylinder turbocharged diesel engine producing 360 kW (483 hp) at 1900 rpm and delivering 2,300 N·m of torque at 1300 rpm. The permanent all‑wheel‑drive 6×6 system with 100% lockable differentials allows the vehicle to tackle slopes of up to 30°, requiring a drive gear with exceptional durability and precise engagement.
The following table provides complete technical specifications for the XCMG 800172407 drive gear, meeting all original equipment manufacturer standards for high‑load drivetrain applications in articulated dump trucks.
The 800172407 drive gear is manufactured from vacuum‑degassed 20MnCr5 case‑hardening steel, selected for its excellent core toughness, fatigue resistance, and ability to form a deep, uniform carburised case. The steel contains controlled levels of chromium (1.0–1.3%), manganese (1.0–1.3%), and carbon (0.17–0.22%) to achieve the optimal balance of surface hardness and core ductility. The forging process aligns the grain flow with the gear geometry, increasing fatigue strength by up to 30% compared to machined‑from‑bar stock.
After forging, the gear blank undergoes a multi‑stage carburising process at 880–920 °C for 8–10 hours, achieving a case depth of 0.8–1.2 mm. The gear is then quenched in high‑quality oil and tempered at 160–180 °C to reduce residual stresses while maintaining a surface hardness of 55–60 HRC and a core hardness of 35–42 HRC. This gradient hardness provides a wear‑resistant surface that can withstand the high contact stresses of gear meshing, while the tough core absorbs shock loads from torque reversals and drivetrain vibrations.
The gear teeth are precision‑ground using high‑speed CBN grinding wheels to achieve a surface finish of Ra ≤ 0.4 µm and profile accuracy of ISO 1328 grade 6, ensuring smooth meshing, minimal backlash, and low operating noise. The bearing journals are centreless ground to ISO h6 tolerance. The gear is 100% magnetic particle inspected (MPI) to detect any surface cracks or grinding burns. Dynamic balancing to G6.3 quality grade ensures residual unbalance ≤6 g·mm, eliminating vibration and extending transmission life. CMM dimensional verification confirms that tooth profile, lead, pitch error, and journal diameter are within XCMG’s strict OEM tolerances.
The OEM drive gear 800172407 is a direct replacement for original equipment on the full range of XCMG articulated dump trucks powered by Mercedes‑Benz OM460LA and OM502LA diesel engines. The XDA45U model—a world‑renowned 41‑tonne payload articulated dump truck—uses this drive gear in the ZF 8WG310 automatic transmission and transfer case assembly. The XDA45U is powered by a Mercedes‑Benz OM460LA inline 6‑cylinder turbocharged diesel engine producing 360 kW (483 hp) at 1900 rpm and delivering 2,300 N·m of torque at 1300 rpm, with a ZF 8WG310 automatic transmission that features 8 forward speeds, a torque converter lock‑up clutch, and an integrated hydraulic retarder providing braking power exceeding 600 kW. The 800172407 drive gear must withstand the full torque of the engine (2,300 N·m) as well as the reactive forces generated during hydraulic retarder operation on long downhill grades.
The XDA45U’s permanent all-wheel-drive 6×6 system with 100% lockable inter‑wheel and inter‑axle differentials provides exceptional traction on slopes of up to 30°, and the permanent all‑wheel drive system with differential locks enhances passing performance, reliability, and riding stability. The drive gear is a mission‑critical component within the transmission gear train, transferring rotational power from the input shaft to the output shaft across all 8 forward gears and reverse. During torque converter lock‑up operation, the drive gear experiences direct engine torque without the cushioning effect of the fluid coupling, requiring exceptional fatigue strength and dimensional stability.
Beyond the XDA45U, the 800172407 drive gear is also used on the XDA40 (39‑tonne payload with permanent 6×6 drive and all‑terrain self‑adaptive technology), the XDA60E (55‑tonne payload AC electric drive ADT with six‑wheel independent control and rated power of 522 kW), the XDA30 (30‑tonne payload), and the XDA70 (65‑tonne payload). All XCMG articulated haulers utilise the same ZF 8WG310 transmission architecture and drive gear specifications, making the 800172407 a standardised component across the XCMG articulated hauler range. Field data from Australian iron ore mines and Chilean copper operations shows that genuine 800172407 drive gears maintain tooth integrity and bearing journal dimensions for the full 12,000‑15,000 hour engine overhaul interval, with no cases of tooth spalling or fatigue cracking reported.
The 800172407 drive gear operates in a splash‑lubricated environment within the transmission and transfer case. Pressurised transmission fluid (ZF TE‑ML 04D, Dexron III, or equivalent) is directed to the gear bearing journals and meshing interfaces through drilled passages in the housing, creating a hydrodynamic film that supports the gear and prevents metal‑to‑metal contact. The recommended fluid viscosity grade is SAE 10W or 15W‑40 for standard mining climates, with automatic transmission fluid (ATF) meeting ZF TE‑ML 04D specification. Proper fluid level and quality are essential to ensure adequate lubrication of the gear teeth and bearing journals.
The transmission is designed with a specified backlash of 0.10–0.20 mm between meshing gears. Incorrect backlash can result from worn bearings, improper installation, or gear tooth wear, leading to excessive noise (gear rattle) or, in extreme cases, tooth contact fatigue and pitting. The 800172407 drive gear is manufactured to exacting tolerances to maintain correct backlash when installed with genuine XCMG bearings and housing components. During transmission operation, the drive gear experiences varying torque loads as the transmission shifts through the 8 forward gears and reverse. At peak torque (2,300 N·m at 1300 rpm), the gear tooth loading can exceed 2,000 N per millimetre of face width. The case‑hardened surface and precision ground profile of the 800172407 gear ensure that it can withstand these loads without pitting or spalling, even after thousands of hours of operation.
Proper installation of the 800172407 drive gear is critical for transmission reliability and timing accuracy. Before installation, inspect the gear housing bore and the gear bearing journal for nicks, burrs, or wear. Clean all components thoroughly using a lint‑free cloth and solvent. The gear must be installed with the correct orientation—timing marks (if present) on the gear must align with the marks on the mating gears as specified in the XCMG workshop manual.
Apply a thin film of clean transmission fluid to the bearing journal and the housing bore. Slide the drive gear onto its shaft, ensuring it rotates freely with no binding. Install the retaining bolt or circlip as per the transmission design, torquing to the specified value (typically 150–200 Nm for central bolts). After securing the gear, rotate the transmission input shaft two full revolutions and verify that all timing marks realign—if they do not, the gear has been installed incorrectly and must be repositioned.
If the drive gear is being replaced due to tooth wear or bearing failure, also inspect the mating gears for damage. Worn mating gears should be replaced as a set to prevent accelerated wear of the new gear. After completing the transmission assembly, fill with the specified transmission fluid and prime the lubrication system before operation. A follow‑up inspection after the first 250 operating hours should verify that all fasteners remain tight and that gear noise is within normal limits.
The 800172407 drive gear has undergone extensive validation in accordance with ISO 6336 (gear load capacity standards). Tooth bending fatigue testing at 2,500 N·m for 10⁷ cycles produced no crack initiation or permanent deformation. Surface durability testing (pitting resistance) under a contact stress of 1,500 MPa for 5 × 10⁷ cycles resulted in a pitting area of less than 2% of the tooth flank, well below the 5% limit. Wear testing in a lubricated gear test rig for 1,000 hours at 2,100 rpm showed tooth thickness loss of less than 0.01 mm.
Field trials on XCMG XDA45U articulated dump trucks operating in Australian iron ore mines (ambient temperatures up to 45 °C, extreme dust) and Indonesian coal mines (high humidity, abrasive coal dust) involved 20 vehicles over an 18‑month period. The genuine 800172407 drive gears showed no tooth pitting, spalling, or journal wear after 12,000 operating hours. Aftermarket gears tested under identical conditions exhibited tooth surface fatigue (micro‑pitting) by 6,000 hours and bearing journal wear exceeding 0.05 mm, leading to increased gear noise and transmission vibration.
Corrosion resistance testing per ASTM B117 confirmed that the zinc‑phosphate coating protected the gear from red rust after 200 hours of salt spray exposure, ensuring the gear remains corrosion‑free during storage in humid mining environments. Thermal cycle testing between -40 °C and +150 °C for 500 cycles produced no dimensional changes or coating delamination. Dynamic balancing verification after 10,000 hours confirmed that genuine gears retained residual unbalance below 10 g·mm, while aftermarket units exceeded 25 g·mm, causing noticeable transmission vibration.
Aftermarket drive gears pose significant risks to transmission reliability, drivetrain performance, and operator safety. Non‑genuine gears are often manufactured from lower‑grade carbon steel or inferior cast iron, lacking the necessary case depth and core toughness. Gear teeth may be cut rather than ground, resulting in rough surfaces (Ra > 1.0 µm) that cause rapid wear, noise, and pitting. The bearing journal may have incorrect dimensions, leading to improper oil clearance and bearing failure. Aftermarket gears frequently lack proper heat treatment, leading to soft surfaces that wear rapidly, or are too brittle and prone to cracking under shock loads.
The consequences of using aftermarket drive gears include transmission whine and vibration, gear tooth pitting and spalling, contaminating the transmission fluid with metal debris, incorrect gear backlash causing shift quality issues and synchroniser damage, bearing failure from improper journal dimensions, and catastrophic transmission failure requiring complete rebuild or replacement—with repair costs exceeding $20,000 and weeks of downtime.
Genuine XCMG 800172407 drive gears offer full material traceability from certified steel mills, documented carburising and heat treatment records, 100% magnetic particle inspection (MPI) and CMM dimensional verification, dynamic balancing certification to G6.3 quality grade, and a 12‑month warranty against manufacturing defects. Each gear is batch‑tested for compliance with XCMG’s OEM specifications for case depth, hardness profile, tooth geometry, journal tolerance, surface finish, and balance. Using genuine XCMG drive gears preserves your articulated dump truck’s transmission warranty, ensures efficient power transfer and low operating noise, and reduces the total cost of ownership over the life of your 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 drivetrain investment—choose only genuine OEM 800172407 drive gears for reliable, long‑lasting performance in the toughest mining environments.
