When your Sinotruk SITRAK C7H struggles to stay in first gear or pops out of reverse under load, don’t blame the driver — check the synchronizer sliding sleeve. El 1312302057 is a critical component in the ZF-sourced (often branded as ZF) 16-speed transmission, responsible for engaging low gears cleanly and holding them under heavy torque.
Especificaciones técnicas:
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Número de parte: 1312302057Z-F
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Product Type: Synchronizer Sliding Sleeve
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Material: High-Strength Alloy Steel
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Compatibilidad: Sinotruk SITRAK C7H Heavy-Duty Trucks (all models utilizing matching transmission systems)
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Outer Diameter: 155mm
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Inner Diameter: 120mm
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Espesor: 20mm
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Peso neto: 1.2kg
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Estándar: OE (Original Equipment) Calidad, Compliant with Sinotruk Factory Specifications
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Garantía: 12-Month Manufacturer Warranty
1. TRATAMOS A CADA CLIENTE COMO NUESTRO AMIGO, PEGARSE AL PRINCIPIO: BENEFICIO MUTUO Y GANADOR ;
2. UNA VARIEDAD DE ELECCIÓN DE PRODUCTOS: CALIDAD, MARCA, EMBALAJE;
3. LE RESPONDEREMOS SU CONSULTA EN 24 HORAS.
4.Proveedor de piezas de rendimiento profesional SINOTRUCK
5. ESTAREMOS EN SERVICIO 24/24 HORAS DEL DÍA LABORAL.
6. CULO: LE OFRECEMOS EL MEJOR SERVICIO POSTVENTA.
How to Install the 1312302057 Z&F Synchronizer Sliding Sleeve – Pro Tips
Before beginning, make sure the transmission is securely mounted on a stand and fully drained. This sleeve operates inside the main shaft assembly of the 16-speed manual/AMT gearbox found in Sinotruk SITRAK C7H trucks (2016–present), so full disassembly is required.
Start by removing the shift fork and inspecting its groove for wear. A worn fork will cause misalignment and uneven movement — one of the top reasons new sleeves fail early.
El 1312302057 sleeve fits gears 1–2 and reverse cluster, where impact loads are highest during起步 (start-up) and backing maneuvers. Align the internal splines carefully with the hub; forcing it can damage adjacent synchronizer rings.
Use a light coat of molybdenum-disulfide grease on the splines — never dry install. Check axial travel after mounting: it should slide smoothly without binding or lateral play. If resistance occurs, recheck alignment and clean any burrs from the shaft.
Reassemble using OEM torque specs (typically 90 Nm for retaining nuts), then refill with SAE 75W-90 GL-5 or synthetic equivalent. Perform a low-speed gear cycling test before road use.
