FAW Central Bridge Differential Assembly: Критический анализ 12 Основные компоненты

Welcome to this critical technical analysis of the FAW Central Bridge Differential Assembly (Часть №. 2503010QA6T). Это “логика” core of the “centre” или “вперед” drive axle for the FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This is the component that allows the truck to make turns without wheel hop.

The FAW Central Bridge Differential Assembly, также известный как “inter-wheel differential carrier,” is a complex set of gears. It is responsible for receiving power from the driveshaft via the main “ring gear” and then splitting that power between the two “half-shafts” (ось) that go to the wheels.

This in-depth guide is an essential resource for professional driveline technicians and parts specialists. Мы разберем всю FAW Central Bridge Differential Assembly в свой 12 исправные компоненты, including the main ‘Differential case assembly’, the ‘Ring gear’, the internal ‘Planetary’ and ‘Half-shaft’ шестерни, and the critical tapered roller bearings.

Основной компонент: The Differential Case (2403015FA6T)

Сердце FAW Central Bridge Differential Assembly is the ‘Rear axle differential case assembly’ (2403015FA6T). (Примечание: “Задняя ось” is used as a generic term for the diff case, but this assembly is for the *centre* bridge). This is the heavy-duty cast iron “клетка” или “carrier” that houses the entire internal gearset.

This component is machined with extreme precision, as it must hold the “spider” и “сторона” gears in a perfect mesh. As shown in the parts list, this case is a two-piece assembly, bolted together to form a sphere:

• ‘Rear axle differential right case’ (2403018FA6T) – 1 единица
• ‘Rear axle differential left case’ (2403017FA6T) – 1 единица

These two halves are machined as a **matched set** and must never be interchanged with halves from another FAW Central Bridge Differential Assembly. The ‘Centre axle driven bevel gear’ (the ring gear) is bolted to the large flange of this case. When the driveshaft spins the ring gear, it is *this case* that rotates, which in turn carries the internal spider gears with it.

The “Reduction” Логика: Кольцо (2502037EA6T) and Ratio (io=2.867)

The ‘Centre axle reduction gearbox assembly (io=2.867)’ (2503010QA6T) and the ‘Centre axle driven bevel gear’ (2502037EA6T) define the axle’s “reduction” логика. The “io=2.867” is the critical “логика” – it is the **Input/Output ratio**.

This ratio means that for every 2.867 revolutions of the truck’s driveshaft (spinning the pinion gear), this ‘Centre axle driven bevel gear’ (the ring gear) will rotate exactly *once*. This is the final gear reduction in the entire powertrain. It multiplies the torque from the transmission, providing the immense force needed to move a fully-loaded trailer. This is a core function of the FAW Central Bridge Differential Assembly.

The ‘Centre axle driven bevel gear’ (ring gear) is bolted to the ‘Rear axle differential case assembly’ using the 16 «Болты с шестигранной головкой’ (Q1851845TF2KS). Это критически важно, high-shear, single-use fasteners that must be torqued in a precise star pattern to prevent the ring gear from warping or shearing off under load. This gear is the primary input to the FAW Central Bridge Differential Assembly.

The “Дифференциал” Логика: Spider and Side Gears

The “логика” принадлежащий FAW Central Bridge Differential Assembly is its ability to allow the left and right wheels to turn at different speeds. This is achieved by the internal gearset:

• **’Planetary gear’ (2403056Д1Х) – 4 единицы:** Это “spider gears.”
• **’Half-shaft gear’ (2403051D1HB1) – 2 единицы:** Это “side gears.”

Here is how this FAW Central Bridge Differential Assembly works: The four ‘Planetary gears’ are mounted on two shafts (the ‘Long’ 2403061-A6T and ‘Short’ 2403062-A6T) that are fixed *inside* the differential case. The two ‘Half-shaft gears’ are splined to the axle shafts (half-shafts) and mesh directly with these four spider gears.

**When driving straight:** The entire case, spider gears, and side gears all spin as one solid unit. The spider gears do not rotate on their shafts; they simply act as a “solid block,” forcing both side gears (and thus both wheels) to turn at the same speed.

**When turning a corner:** The inner wheel must slow down, and the outer wheel must speed up. The differential “логика” allows this. The inner wheel’s side gear slows down. This forces the spider gears to “orbit” или “walk” around the slower side gear. Этот “ходьба” движение, по очереди, *accelerates* the other side gear, allowing the outer wheel to spin faster. This action is the core logic of the FAW Central Bridge Differential Assembly.

Thrust Washers and Bearings: The Unsung Heroes

The internal gears of the FAW Central Bridge Differential Assembly are under immense separating forces. The parts list includes ‘Gasket-half-shaft gear’ (2403053Д1Х) and ‘Planetary gear gasket’ (2403058-А9Т). Эти “прокладки” are actually critical **thrust washers**.

These are hardened, anti-friction washers placed *behind* the side gears and spider gears. They prevent the steel gears from grinding themselves into the soft cast iron of the differential case. A worn-out thrust washer will create excessive “backlash” или “помои” in the differential, ведущие к “clunk” on acceleration and eventual gear failure.

Весь FAW Central Bridge Differential Assembly (the case with the ring gear bolted to it) spins within the main axle housing on two massive ‘Tapered roller bearing assembly’ единицы (2403060-A8T-C00 and 2403070-A6T-C00). These are the main “carrier bearings.” They support the entire weight of the differential, the torque from the driveshaft, and the entire weight of the truck. A failure of these bearings is a critical fault, often heard as a “whine” или “growl.” These bearings are a key serviceable part of the FAW Central Bridge Differential Assembly.

FAW Central Bridge Differential Assembly Parts List

В следующей таблице представлена ​​полная, подробная разбивка всех 12 components identified in the ‘Central Bridge Differential Assembly (io=2.867)’ схема трактора FAW CA4251P66K24T1A3E5. Этот FAW Central Bridge Differential Assembly is a precision-matched set.

Технические характеристики и контекст сборки

Технические характеристики FAW Central Bridge Differential Assembly определяются своей функцией как высокомоментный, final-drive reduction gearset with an integrated differential. The FAW Central Bridge Differential Assembly это “логика” core of the centre axle.