- Чанчунь город, Провинция Цзилинь, Китай
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Welcome to this critical technical guide on the FAW Transmission Mounting Logical Assembly. This is the complete, heavy-duty rear support system for the manual transmission, designed specifically for the FAW Jiefang CA4251P66K24T1A3E5 6×4 diesel semi-trailer tractor. This system is the structural “cradle” that supports the entire weight of the gearbox and isolates it from the chassis.
The FAW Transmission Mounting Logical Assembly is not the transmission itself, but rather the set of “Левый” (1706051A91W) и “Верно” (1706052A91W) brackets that bolt to the rear of the gearbox. These brackets then rest on the chassis crossmember (see Assembly 323), providing a flexible, vibration-damped connection.
This in-depth guide is an essential resource for professional chassis technicians, fleet managers, and parts specialists. We will deconstruct the entire FAW Transmission Mounting Logical Assembly into its 4 serviceable components, explaining the function of each bracket and the critical, high-tensile flange bolts used to secure them against the immense torque and vibration of a heavy-duty powertrain.
The heart of the FAW Transmission Mounting Logical Assembly consists of a symmetrical pair of heavy-duty support brackets:
These are not simple “л” скобки. They are massive, complex castings, typically made from high-strength ductile iron or fabricated steel. They are heavily ribbed and gusseted to provide maximum rigidity against “torque-twist.” Their primary function is to act as the “feet” of the transmission. They bolt directly to the sides of the transmission’s rear housing (the auxiliary “sub-box”).
The “logic” of this FAW Transmission Mounting Logical Assembly is to provide a wide, stable platform. The flat, lower surfaces of these brackets are what rest on top of the ‘Transmission mounting flexible cushion assy’ (the large rubber mounts, detailed in Assembly 323). Этот “bracket-on-cushion” design is what isolates the powertrain from the chassis, which is the entire purpose of a modern FAW Transmission Mounting Logical Assembly.
A crack or failure in one of these brackets is a catastrophic structural failure. It would cause the entire rear of the transmission to “sag” or drop. This would immediately misalign the entire driveline, changing the driveshaft’s “U-joint angles,” which would cause severe vibration, and eventual failure of the U-joints, center support bearing, or the transmission’s output shaft bearing. The integrity of this FAW Transmission Mounting Logical Assembly is therefore critical to the entire driveline.
The final two components of the FAW Transmission Mounting Logical Assembly are the high-tensile fasteners that secure the brackets to the transmission housing. A mount is only as strong as its bolts.
The parts list calls for two different bolt sizes, totaling 10 болты:
These are not standard hardware. The “фланец” head is an integrated washer. This is a critical design choice for mounting a steel bracket to an (often) aluminum transmission housing. The wide flange distributes the immense clamping force over a larger surface area, preventing the hard steel bolt from “digging into” или “cracking” the softer aluminum casing.
The “Т” suffix on these bolts (НАПРИМЕР., Q1851650**T**) indicates a specific high-tensile strength class (НАПРИМЕР., 10.9) and a specialized, corrosion-resistant coating. These bolts must endure the constant, multi-axis “shear” forces from the engine’s torque. The different part numbers (-1650T vs -1670T) indicate different lengths, which are required for the different thicknesses of the transmission casing’s mounting bosses.
Using the correct, factory-specified, high-tensile flange bolts is the only way to ensure the FAW Transmission Mounting Logical Assembly remains securely attached to the gearbox. A loose or failed bolt would cause the entire transmission to become unsupported, leading to catastrophic failure. The FAW Transmission Mounting Logical Assembly relies on this hardware.
The following table provides the complete, detailed breakdown of all 4 components identified in the ‘Transmission Mounting Logical Assembly’ diagram for the FAW CA4251P66K24T1A3E5 tractor. Этот FAW Transmission Mounting Logical Assembly is the core support structure for the gearbox.
| Mark | Часть №. | Наименование | Количество |
|---|---|---|---|
| 1 | Q1851650T | Hex head flange bolt | 6 |
| 2 | Q1851670T | Hex head flange bolt | 4 |
| 3 | 1706051A91W | Transmission mounting left bracket | 1 |
| 4 | 1706052A91W | Transmission mounting right bracket (symmetric with left part) | 1 |
The specifications for the FAW Transmission Mounting Logical Assembly are defined by its function as the heavy-duty, torque-resisting, vibration-isolating “feet” of the gearbox. The FAW Transmission Mounting Logical Assembly connects the transmission to the chassis.
| Vehicle Application | FAW Jiefang CA4251P66K24T1A3E5 6×4 Tractor |
| Component Group | FAW Transmission Mounting Logical Assembly |
| Основные компоненты | Левый кронштейн (1706051A91W) & Правый кронштейн (1706052A91W) |
| Материал (Typical) | High-Strength Cast Iron or Fabricated Steel |
| Total Fasteners | 10 (6x Q1851650T, 4x Q1851670T) |
| Fastener Type | High-Tensile Hex Head Flange Bolts |
| Mating Assembly (Шасси) | Transmission Auxiliary Mounting Crossbeam (Сборка 323) |
| Primary Function | To connect the rear of the transmission to the flexible cushion mounts, supporting its weight and resisting torque. |
FAW parts, including the Cylinder Block Assembly, are packaged with care to ensure safe delivery. Each component is secured in protective materials to prevent damage during transit. The logistics network guarantees timely shipments worldwide, supporting efficient maintenance operations. Below is an image illustrating the standard packaging for FAW truck parts, showcasing the attention to detail in handling and storage.
This packaging approach minimizes the risk of corrosion or impact damage, ensuring that parts like the FAW Cylinder Block Assembly arrive in perfect condition. Customers can rely on FAW’s logistics for consistent quality and reliability.
FAW — один из старейших и крупнейших производителей автомобилей в Китае., с уставным капиталом в юанях 35.4 млрд юаней и общие активы юаней 457.83 миллиард юаней.
КИТАЙСКАЯ ГРУППА FAW CO., ООО. (сокращение от FAW), бывший Китайский первый автомобильный завод, можно проследить его корни до июля 15, 1953, когда началось строительство первого сборочного завода. FAW — один из старейших и крупнейших производителей автомобилей в Китае., с уставным капиталом в юанях 35.4 млрд юаней и общие активы юаней 457.83 миллиард юаней.
Продажи тяжелых грузовиков в Китае по всему миру “пять подряд”, продажи тяжелых грузовиков по всему миру “шесть подряд”, продажа тракторов для 16 годы подряд абсолютный лидер отрасли.
