FAW J6P Rear Axle: Deconstructing 57 Critical Parts for Maximum Load Capacity

This is a complete technical deconstruction of the FAW J6P Rear Axle (Model CAR16T300W) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This guide breaks down the 57 serviceable components, from the main reducer to the differential lock, detailing the parts required for a full service and rebuild of this critical assembly.

The FAW J6P Rear Axle is a heavy-duty, single-reduction axle with an integrated differential lock, designed for extreme-duty applications. Its 5.263 final drive ratio (io=5.263) provides immense torque multiplication, which is essential for off-road and heavy-haul scenarios. This deconstruction will analyze the complete assembly, focusing on the serviceable units that technicians must manage to ensure the longevity and reliability of the entire drivetrain. We will explore the input pinion, the differential, the locking mechanism, and the axle shafts, all of which form the complete FAW J6P Rear Axle system.

Core 1: The “Input & Reducer” Logic (The Pinion Assembly)

This group forms the input section of the FAW J6P Rear Axle. It receives power from the driveshaft and performs the first and primary stage of gear reduction (io=1.333). This assembly’s precise setup is critical for the axle’s lifespan.

1. Component: ‘Main reducer assy’ (2402010AA6E) – Qty 1
This (Comp part) is the complete input pinion and gear set. This is the heart of the FAW J6P Rear Axle‘s reduction. It is a precision-machined, matched set, meaning the pinion gear and the main ring gear (Comp 39) must be replaced together to ensure perfect tooth contact.

2. Component: Bearing & Support Group (32315, 2402049-A0E, 2402048-A0E)
This group (Comp 11, 13, 12) is the set of tapered roller bearings and oil thrower that support the pinion shaft. The Tapered Roller Logic is critical. These bearings must handle massive axial (thrust) and radial (sideways) loads simultaneously. The FAW J6P Rear Axle relies on these heavy-duty bearings for rigid pinion alignment under torque.

3. Component: ‘Adjustment shim-main reducer driven pinion’ (2402097~99-A0E) – Qty As Req.
This (Comp 9) is a set of precision shims, provided in thicknesses like 0.5mm, 0.15mm, and 0.10mm. The Pinion Pre-load Logic is the most critical assembly step. These shims are used to set the precise rotating torque (pre-load) on the pinion bearings. An incorrect shim pack will cause the bearings on the FAW J6P Rear Axle input to fail very quickly, leading to catastrophic damage.

4. Component: Seal & Flange Group (2402055-A0E, 2402067-A0E, 2402036AA6E)
This group includes the main ‘Oil seal-driven pinion’ (Comp 18) and ‘Dust cap’ (Comp 19). This system prevents gear oil from leaking out and contaminants (dirt, water) from entering the FAW J6P Rear Axle housing. The ‘Flange-main reducer’ (Comp 10) is what connects to the driveshaft, secured by the ‘Nut’ (Comp 22).

Core 2: The “Differential & Lock” Logic (Torque Distribution)

This assembly is the ‘brain’ of the FAW J6P Rear Axle. It manages the torque split between the left and right wheels and houses the driver-controlled differential lock, which is essential for navigating low-traction environments.

1. Component: ‘Differential assy’ (2403015-A0E) – Qty 1
This (Comp A) is the complete differential carrier, which includes the case halves (‘Left case-differential’ 2403017-A0E and ‘Right case’ 2403018-A0E) and all internal gears. This entire unit is bolted to the main ring gear (Comp 39).

2. Component: Spider & Gear Group (2403061-A0E, 2403056-A0E, 2403051-A0E)
This group (Comp 47, 46, 49) includes the ‘Cross’ (spider), the ‘Planetary gear’ (spider gears), and the ‘Half shaft gear’ (side gears). This Planetary Logic is what allows the wheels to rotate at different speeds when turning. The FAW J6P Rear Axle uses a robust 4-pinion design for maximum strength under load.

3. Component: Differential Lock Group (2406024~34-A0E)
This (Comp 24-27) is the air-actuated locking mechanism. It includes the ‘Fork-diff lock’ (Comp 24), ‘Sliding sleeve’ (Comp 25), and ‘Fixed sleeve’ (Comp 26). When the driver activates the ‘Switch assy-diff lock’ (Comp 37), air pressure moves the fork, which slides the sleeve to lock the differential. This makes the FAW J6P Rear Axle a ‘solid’ axle, forcing both wheels to turn at the same speed.

4. Component: ‘Air cylinder’ & ‘Piston’ (2406016-A0E, 2406014-A0E)
This (Comp 35, 31) is the external actuator. The ‘Air cylinder’ receives air from the ‘Hose connector’ (Comp 36) and pushes the ‘O type ring-diff lock piston’ (Comp 31), which in turn moves the lock fork. This is the activation system for the FAW J6P Rear Axle differential lock.

Core 3: The “Foundation & Output” Logic (Housing & Shafts)

This group represents the foundation of the entire assembly and the final components that deliver power to the wheel hubs. The strength of these parts is paramount for the FAW J6P Rear Axle‘s load-bearing and torque-handling capabilities.

1. Component: ‘Rear axle housing’ (2401011-A6E) – Qty 1
This (Comp 2) is the main structural backbone. It holds the differential, contains the lubricating oil, and supports the vehicle’s load. It also features the ‘Breather’ (Comp 4) and ‘Plug-magnetic’ (Comp 5, T62104M) for maintenance. The FAW J6P Rear Axle housing is a massive cast component built to withstand extreme punishment.

2. Component: ‘Driven pinion’ (2402037AA6E) – Qty 1
This (Comp 39) is the main ‘ring gear’. It is bolted to the differential case (Comp A) using 18 high-strength ‘Bolt-fastening reducer’ (Comp 7). This gear is a matched set with the input pinion (Comp 2402010AA6E) and defines the final drive ratio of the FAW J6P Rear Axle.

3. Component: ‘Left half shaft’ & ‘Right half shaft’ (2403081B483, 2403082B483)
These (Comp 56, 57) are the axle shafts. They are splined into the differential’s side gears (Comp 49) and transmit torque to the wheel hubs. These shafts are designed to flex torsionally to absorb shock loads, protecting the FAW J6P Rear Axle differential from sudden, damaging impacts.

Core 4: The “Alignment & Pre-load” Logic (Differential Carrier)

This final group is critical for servicing the differential. These components set the alignment and pre-load of the entire differential carrier within the FAW J6P Rear Axle housing.

1. Component: ‘Tapered roller bearing’ (32216/YA6E) – Qty 1
This (Comp 44) is one of the two massive tapered roller bearings that support the entire differential assembly (Comp A). These bearings handle the immense radial load of the vehicle and the axial thrust from the ring gear.

2. Component: ‘Cover-differential bearing’ (2402019-A0E) & ‘Nut-fastening differential bearing cover’ (2402023-A0E)
This (Comp 51, 52) is the bearing cap and fastener set for the other side of the differential carrier. These caps hold the bearings (Comp 44) in place and are fundamental to the structural integrity of the FAW J6P Rear Axle.

3. Component: ‘Adjustment shim-differential bearing’ (2403071-A0E) – Qty 2
This (Comp 45) is a precision shim. The Backlash Logic is set here. Technicians use these shims to move the entire differential carrier left or right, setting the precise tooth contact pattern (backlash) between the pinion (Comp 2402010AA6E) and ring gear (Comp 39). This adjustment is fundamental to a quiet and long-lasting FAW J6P Rear Axle.

FAW J6P Rear Axle: Complete 57-Part Breakdown

The following table provides the complete, detailed breakdown of all 57 component types in the FAW J6P Rear Axle assembly (CAR16T300W) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This list is essential for ordering spare parts and performing a complete overhaul of the FAW J6P Rear Axle.

Core Specifications

The specifications for the FAW J6P Rear Axle are defined by its heavy-duty single-reduction design and integrated differential lock, making it ideal for the demanding environment of a 6×4 dump truck. Understanding these specifications is key to ordering the correct FAW J6P Rear Axle parts.