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. O 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.
Especificações técnicas:
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Número da peça: 1312302057Z-F
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Product Type: Synchronizer Sliding Sleeve
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Material: High-Strength Alloy Steel
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Compatibilidade: Sinotruk SITRAK C7H Heavy-Duty Trucks (all models utilizing matching transmission systems)
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Diâmetro Externo: 155milímetros
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Diâmetro interno: 120milímetros
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Thickness: 20milímetros
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Peso líquido: 1.2kg
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Padrão: OE (Original Equipment) Qualidade, Compliant with Sinotruk Factory Specifications
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garantia: 12-Month Manufacturer Warranty
1. TRATAMOS CADA CLIENTE COMO NOSSO AMIGO, FICAR NO PRINCÍPIO: VANTAGEM E BENEFÍCIO MÚTUO ;
2. UMA VARIEDADE DE ESCOLHA DE PRODUTOS: QUALIDADE, MARCA, EMBALAGEM;
3. RESPONDEREMOS SUA INQUÉRITO EM 24 HORAS.
4.Fornecedor de peças SINOTRUCK de desempenho profissional
5. ESTAMOS A SERVIÇO 24/24 HORAS DO DIA DE TRABALHO.
6. BUNDA: OFERECEREMOS A VOCÊ O MELHOR SERVIÇO PÓS-VENDA.
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.
O 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.
