XCMG Rear Final Drive Input Flange 860120053 | Driveline Connection, Power Transfer Key Part

The rear final drive input flange (also called rear axle input coupling flange, yoke flange, or pinion flange) is the key component connecting the propeller shaft to the rear axle final drive pinion shaft. Its flange face features several bolt holes that fasten to the propeller shaft flange end with high-strength bolts; the inner bore is typically machined with splines or a mating surface that engages with the pinion shaft-end spline, forming a dual connection of "bolt clamping + spline torque transmission" to ensure slip-free power transfer even under high-torque conditions.

Within the rear final drive assembly, the input flange sits at the very front of the drive chain—power travels from the transmission via the propeller shaft to the input flange, then through the drive pinion, ring gear, differential, and axle shafts, ultimately driving the wheels. Thus the input flange's condition directly affects drive smoothness: once the flange face wears, the spline gets scored, or the bolts loosen, it causes driveline noise, increased vibration, and unstable power transfer—in severe cases even propeller shaft detachment, endangering operational safety.

This 860120053​ is suitable for the input connection of final drives across various heavy-equipment rear axles. Typically made of high-quality alloy steel and heat-treated, it offers high tensile strength and impact resistance for long-term stable operation under heavy-load, high-torque, dusty, and high-vibration conditions. During replacement, tighten the flange bolts diagonally and alternately to the torque specified in the original service manual, apply the specified grease grade to the spline area, and perform a no-load test run after assembly to check for abnormal noise and leakage.