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The inter-axle differential distributes torque between the front and rear drive axles, allowing them to rotate at different speeds during turns while keeping both driven. When it fails, the axles fight each other, the driveline binds, and traction is lost. On a loaded truck, this means being stranded.
We are Shaanxi Tolizer Machinery Equipment Co., Ltd., a supplier of heavy-duty truck and axle components for Shacman, TONLY, SINOTRUK, LiuGong, and FAW distributors and workshops.
Our DZ90149320000 Inter-Axle Differential Assembly replaces the original Hande component. Fits Hande TGX and HDZ300 axles on Shacman Delong X3000, M3000, F3000. 12-claw design, 37 kg. Alternative part number: FDZ90149320000. Includes housing, main and slave cylindrical gears, and internal planetary gear system.
Choosing this assembly means choosing a complete, pre-assembled unit that restores correct torque distribution.
Product Detail Image:
Surface Treatment: Alloy steel housing, machined bearing bores. Gears forged, carburized, quenched, ground. Protective coating for storage.
Manufacturing Process: Housing cast and CNC-machined. Gears forged, carburized, quenched, ground to final profile. Planetary set assembled with matched components. Each unit checked for gear mesh, preload, smooth rotation.
Structure Diagram: Housing contains main gear (input), slave gear (output to rear axle), and planetary gear system for speed differentiation. Mounts between front and rear axle drive pinions inside middle axle housing.
Installation Position: Installs inside middle axle housing between through-drive shaft and rear axle output shaft. Distributes torque to both axles. Lock mechanism engages this assembly.
Product Principle: Main gear drives differential housing. Planetary gears split torque between slave gear (rear axle) and through-drive shaft (middle axle). Equal traction: assembly turns as one unit. Different traction: planetary gears rotate, allowing speed difference. 12-claw sleeve locks planetary gears when traction is lost.
Diagnostic Note: Watch for: Grinding from middle of tandem axle changing with speed, not turning — planetary gears worn. Vibration under load — uneven torque distribution. Lock light flashes but does not stay on — 12-claw sleeve worn. Metal debris in middle axle oil — gears wearing; drain and inspect. Vehicle pulls under power, tracks straight coasting — one axle receiving more torque. Before replacing, check lubrication condition and through-drive/rear output shaft splines for wear.
Grinding or rumbling from middle of tandem axle? Before ordering, drain middle axle oil and check for metal debris. Inspect through-drive and rear output shaft splines for fretting. Send truck model, axle model, symptoms. We will confirm DZ90149320000 (12-claw) as correct fit for your Hande TGX or HDZ300 middle axle and respond with pricing, lead time, and gear mesh inspection data.
Contact Tolizer today to secure your inter-axle differential supply.
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