The Genuine SINOTRUK ZF Transmission Synchronizer Gear Cone Hub (1316.304.190) is the core component responsible for this precision. As a critical piece of sinotruk spare parts, this hub is the friction surface that works with the synchronizer ring to match the rotational speeds of the gear and the shaft before engagement. This speed matching is what prevents the dreaded “gear crunching” and allows for seamless shifting.
Technical Specifications
The 1316.304.190 hub is engineered for the extreme demands of the ZF Ecosplit transmission family.
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Specification
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Value
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Part Number
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1316.304.190
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Alternative Names
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Synchronizer Cone, Synchro Hub Component
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Product Name
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Synchronizer Gear Cone Hub
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Application
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ZF 16S Series Transmissions (e.g., 16S151, 16S221)
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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-Grade Carburized Steel
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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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Provides friction surface for speed synchronization (typically 3rd/4th gear)
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Condition
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Brand New
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Installation Notes
Replacing a synchronizer component is a highly technical procedure 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 completely disassembled to access the main shaft and the synchronizer assembly. Cleanliness is non-negotiable; even microscopic debris can compromise the synchronizer’s function.
2.Component Inspection: Before installing the new 1316.304.190 hub, thoroughly inspect all mating components, including the synchronizer ring, shift sleeve, and gear teeth. It is highly recommended to replace the synchronizer ring at the same time, as it is a wear item.
3.Installation and Lubrication: Lightly lubricate the friction surface of the new cone hub and the synchronizer ring with the specific ZF-approved transmission oil. Use specialized tools to press the hub onto the shaft or gear assembly, ensuring even pressure to prevent distortion.
4.Clearance Check: After reassembly, the technician must measure the synchronizer clearance (the gap between the ring and the hub) using a feeler gauge. This clearance must fall within the narrow tolerance specified in the ZF service manual to guarantee proper synchronization.
5.Final Reassembly: Reassemble the transmission, ensuring all components are torqued to factory specifications. Use new gaskets and seals throughout the process.
6.Testing: After reinstallation in the vehicle, test the gear engagement in all positions. Any grinding or excessive shift effort indicates a problem with the synchronization assembly or adjustment.
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