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. The 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.
Технические спецификации:
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номер части: 1312302057Z-F
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Product Type: Synchronizer Sliding Sleeve
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материал: High-Strength Alloy Steel
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Совместимость: Sinotruk SITRAK C7H Heavy-Duty Trucks (all models utilizing matching transmission systems)
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Outer Diameter: 155мм
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Inner Diameter: 120мм
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Thickness: 20мм
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Вес нетто: 1.2кг
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Стандарт: OE (Original Equipment) Качество, Compliant with Sinotruk Factory Specifications
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Гарантия: 12-Month Manufacturer Warranty
1. МЫ ОТНОСИТСЯ К КАЖДОМУ КЛИЕНТУ КАК НАШ ДРУГ, ПРИГЛАШАЕМСЯ К ПРИНЦИПУ: ВЫИГРЫША И ВЗАИМНАЯ ВЫГОДА ;
2. РАЗНООБРАЗНЫЙ ВЫБОР ТОВАРОВ: КАЧЕСТВО, БРЕНД, УПАКОВКА;
3. МЫ ОТВЕТИМ ВАМ НА ЗАПРОС В 24 ЧАСЫ.
4.Профессиональный поставщик запчастей SINOTRUCK
5. МЫ БУДЕМ В ОБСЛУЖИВАНИИ 24/24 ЧАСЫ РАБОЧЕГО ДНЯ.
6. ЖОПА: МЫ ПРЕДЛАГАЕМ ВАМ ЛУЧШЕЕ ПОСЛЕПРОДАЖНОЕ ОБСЛУЖИВАНИЕ.
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.
The 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.
