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The DZ90149320006 wheel differential carrier mounts inside the Hande HDZ300 rear axle on Shacman X3000 trucks. It splits torque between left and right half-shafts, letting the inside wheel turn slower during turns while the outside wheel drives. It also carries the differential lock engagement teeth on its outer housing, so when traction drops, the driver can lock both wheels together.
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 worldwide.
Our DZ90149320006 Wheel Differential Assembly replaces the original Hande component. Fits Shacman X3000 with HDZ300 rear axle. Alternative part numbers: FHD9014932010701, DZ90149320005. Weight: 15 kg (carrier) / 32 kg (complete). Gear ratios: 4.111, 4.444, 4.875, 5.286.
Choosing this assembly means choosing a complete rear-axle carrier that restores wheel differentiation and reliable lock engagement.
Surface Treatment: Nodular cast iron QT420-10 housing, machined bores. Side and pinion gears forged, carburized to HRC 58–62, ground. 22CrMnMo cross shaft. Lock teeth hardened and ground. Protective coating.
Manufacturing Process: Housing cast and CNC-machined. Gears forged, carburized, quenched, ground. Cross shaft heat-treated. Assembly built and inspected for gear mesh, cross shaft fit, lock teeth, smooth rotation.
Structure Diagram: Cast carrier housing with two side gears (splined to half-shafts), two/four pinion gears on cross shaft. Side gears mesh with pinion gears at 90°. Housing rotates with ring gear, carries lock teeth on outer surface.
Installation Position: Installs inside rear axle housing between half-shafts. Bolted to ring gear or integrated with carrier. Half-shafts spline into side gears. Lock mechanism engages housing when traction lost.
Product Principle: Torque enters through housing driven by ring gear. Cross shaft carries pinion gears meshing with side gears splined to half-shafts. Equal traction: assembly turns as one unit. Turning: pinion gears rotate on cross shaft, allowing wheel speed difference. Lock mechanism locks side gears to housing when traction lost. Rear axle unit differs from middle axle unit in mounting position and lock engagement geometry.
Diagnostic Note: Rumbling or grinding loudest when turning — side/pinion gears worn. Uneven tire wear left/right — differential not differentiating smoothly. Lock light flashes but does not stay on — lock teeth worn. Metal debris in rear axle oil — gears wearing; drain and inspect. Before replacing, check half-shaft splines and lubrication condition.
Rumbling or grinding from rear axle when turning? Drain rear axle oil, check for metal debris. Inspect half-shaft splines. If differential gears or lock teeth are worn, this assembly is the fix. Send truck model, axle model, symptoms. We will confirm DZ90149320006 as correct fit for your Hande HDZ300 rear axle and respond with pricing, lead time, and gear mesh inspection data.
Contact Tolizer today to secure your wheel differential supply.
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