The Genuine SINOTRUK ZF Transmission Synchronizer Cone Hub (1297 304 529) is a high-precision, load-bearing component that forms the backbone of the gear engagement system. As a vital piece of sinotruk spare parts, this hub is responsible for two critical functions: providing the friction surface for speed synchronization and serving as the anchor point for the sliding sleeve that locks the gear to the main shaft.
Technical Specifications
The 1297 304 529 synchronizer cone hub is a robust, precision-engineered component designed for the extreme demands of the ZF Ecosplit 4 system.
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Specification
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Value
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Part Number
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1297 304 529
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Alternative Names
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Synchronizer Clutch Body, 1st/2nd Gear Hub
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Product Name
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Synchronizer Cone Hub
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Transmission Model
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ZF 16S2530, 16S2230 (Ecosplit 4 Series)
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Compatible Vehicles
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SINOTRUK HOWO, SITRAK, and other trucks using ZF 16S gearboxes
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Brand
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ZF (Original OEM Specification)
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Material
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High-Strength Forged Steel (Carburized)
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Hardness
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58-63 HRC (Rockwell Hardness C Scale)
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Function
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Anchor point for sliding sleeve and friction surface support for synchronizer ring
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Weight (Approx.)
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1.120 KG
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Condition
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Brand New
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Installation Notes
Replacing the synchronizer cone hub is a highly specialized task that requires complete transmission disassembly. This work must be performed by a certified transmission specialist in a clean, controlled environment.
1.Transmission Disassembly: The gearbox must be removed from the vehicle and placed on a stable stand. Accessing the hub requires the main shaft to be disassembled, often involving the use of specialized pullers and a hydraulic press.
2.Inspection of Mating Parts: Before installing the new 1297 304 529 hub, thoroughly inspect the main shaft splines for wear. More critically, inspect the mating sliding sleeve and the synchronizer rings. If the old hub failed, the mating parts are likely worn and should be replaced simultaneously to prevent immediate failure of the new hub.
3.Installation and Lubrication: Clean the main shaft splines thoroughly. Lightly lubricate the internal splines of the new hub with the specific ZF-approved transmission oil (e.g., ZF-Ecofluid M). Use a press to install the hub onto the main shaft, ensuring it is seated perfectly against its shoulder. Never use a hammer.
4.Synchronizer Assembly: Reassemble the synchronizer rings, sliding blocks, and springs, ensuring they are correctly seated. Verify that the sliding sleeve moves smoothly on the new hub.
5.Final Reassembly: Reassemble the transmission, ensuring all components are torqued to factory specifications. Use new gaskets and seals.
6.Testing: After reinstallation, test the gear engagement in all positions. The shift should be smooth, and the transmission must hold the gear securely under load without vibration or noise.
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