A front axle spiral bevel gear set is the core transmission element inside the front axle final drive of heavy equipment. It typically consists of a drive pinion and a ring gear that mesh as a pair, redirecting the longitudinal power from the propeller shaft by 90° toward the left and right wheels while reducing speed and increasing torque. Carraro, a well-known Italian transmission-component manufacturer, supplies front axles widely used in tractors, backhoe loaders, and wheel loaders, with established partnerships with Chinese OEMs including XCMG, Sany, and Zoomlion.
Within XCMG's special-machine product line, the XT870 backhoe loader explicitly uses Carraro front axles, and related front-axle spares (such as part number 800307386) are available through XCMG parts channels and authorized dealers. This 860130460 is labeled a "special machine spare," but which specific special-machine model it corresponds to should be further verified through XCMG's parts system or catalog number.
Since a spiral bevel gear set is a precision mating pair, it must be replaced as a complete set—never replace just one side, as mismatched contact patterns between old and new gears will cause meshing noise, surface pitting, or even tooth fracture. During installation, strictly adjust the gear backlash and contact zone per the original service manual, and re-inspect after a no-load test run to ensure no abnormal noise or overheating.
A front axle spiral bevel gear set is the core transmission element inside the front axle final drive of heavy equipment. It typically consists of a drive pinion and a ring gear that mesh as a pair, redirecting the longitudinal power from the propeller shaft by 90° toward the left and right wheels while reducing speed and increasing torque. Carraro, a well-known Italian transmission-component manufacturer, supplies front axles widely used in tractors, backhoe loaders, and wheel loaders, with established partnerships with Chinese OEMs including XCMG, Sany, and Zoomlion.
Within XCMG's special-machine product line, the XT870 backhoe loader explicitly uses Carraro front axles, and related front-axle spares (such as part number 800307386) are available through XCMG parts channels and authorized dealers. This 860130460 is labeled a "special machine spare," but which specific special-machine model it corresponds to should be further verified through XCMG's parts system or catalog number.
Since a spiral bevel gear set is a precision mating pair, it must be replaced as a complete set—never replace just one side, as mismatched contact patterns between old and new gears will cause meshing noise, surface pitting, or even tooth fracture. During installation, strictly adjust the gear backlash and contact zone per the original service manual, and re-inspect after a no-load test run to ensure no abnormal noise or overheating.
