FAW J6P Right Centre Shaft: Deconstructing 15 Critical Parts for Flawless Torque Splitting

Welcome to this specialized technical analysis of the FAW J6P Right Centre Shaft, a foundational component in the CA10TA160M gearbox for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This guide provides a complete deconstruction of the 15 parts that make up the FAW J6P Right Centre Shaft, a critical “countershaft” in the transmission’s twin-shaft design.

The FAW J6P Right Centre Shaft works in perfect harmony with its “Left” counterpart to handle the immense power from the engine. This “twin-countershaft” logic splits the torque, effectively halving the load on each gear tooth. This design is essential for the durability and reliability required in a heavy-duty dump truck application.

Core 1: The “Shaft & Keyway” Logic (The Core Spine)

This group represents the foundation of the FAW J6P Right Centre Shaft. It includes the shaft itself and the various keys used to permanently lock the drive gears onto it, ensuring the entire assembly spins as one solid unit.

1. Component: ‘Centre shaft’ (1701211-A7G)
This (Comp 3) is the ‘Centre shaft’ itself, the spine of the assembly. As the FAW J6P Right Centre Shaft, this component is identical to its left-side counterpart. It is a single, heavy-duty shaft, precision-machined from forged steel to be incredibly rigid and resistant to the torsional (twisting) forces of a high-torque diesel engine.

The Torque Splitting Logic is its core purpose. The FAW J6P Right Centre Shaft runs parallel to the mainshaft and the ‘Left Centre Shaft’. It receives approximately 50% of the power from the input shaft gear and is in constant, permanent mesh with the “driven” gears on the mainshaft. This load-sharing is what makes the gearbox so robust.

2. The “Key” Group (Comp 4, 5, 6)
This group includes: ‘Woodruff key’ (Comp 4), ‘Spring cylindrical pin’ (Comp 5), and ‘Flat key’ (Comp 6). These are all “locating keys” used to fix the gears to the FAW J6P Right Centre Shaft.

The Locking Logic is their function. The drive gears (like Comp 7, 8, 9) are not “free-spinning”; they must be rigidly locked to the FAW J6P Right Centre Shaft. A ‘Woodruff key’ (Comp 4) is a half-moon shaped key that sits in a crescent-shaped slot, locking a gear hub in place. A ‘Flat key’ (Comp 6) is a simple, strong key for a straight slot. A ‘Spring pin’ (Comp 5) is a vibration-proof pin, likely used to secure a gear collar.

Core 2: The “Main Drive Gear” Logic (The Gear Set)

This is the primary “working” part of the FAW J6P Right Centre Shaft. These are the fixed gears that provide the “drive” torque to the mainshaft’s “driven” gears.

1. The “Main Gears” (Comp 7, 8, 9)
This group includes: ‘Second gear – centre shaft’ (Comp 7), ‘Third gear – centre shaft’ (Comp 8), and ‘Fourth gear – centre shaft’ (Comp 9). These gears are the drive-side of the main gear ratios.

The Constant Mesh Logic is key. Unlike the mainshaft gears (which spin freely), all gears on the FAW J6P Right Centre Shaft are *fixed* to the shaft (e.g., by the keys in Core 1). They spin as one single, solid unit, perfectly synchronized with the ‘Left Centre Shaft’.

This means when the engine turns the FAW J6P Right Centre Shaft, all these gears (2nd, 3rd, 4th) are spinning at the same RPM. The driver selects a gear by locking the corresponding “driven” gear (on the mainshaft) to the mainshaft, which completes the power path for that specific ratio.

2. Component: ‘Reduction gear – centre shaft’ (1701217-A7G)
This (Comp 11) is the ‘Reduction gear’. This is likely the main “input” gear of the FAW J6P Right Centre Shaft, which meshes with the ‘First Axis’ (input shaft) gear.

Its Reduction Logic is to provide the first, main gear reduction in the entire gearbox. It multiplies the torque *before* it even gets to the 2nd/3rd/4th gears, providing the massive “grunt” or “pulling power” needed for a dump truck. It is secured on the shaft by its own ‘Snap ring’ (Comp 12). This gear’s health is critical to the FAW J6P Right Centre Shaft.

Core 3: The “Power Take-Off” Logic (The PTO Gear)

This component’s logic is to provide a “tap” or “take-off” point for the engine’s power, allowing it to run auxiliary equipment, which is essential for a dump truck.

1. Component: ‘PTO gear – centre shaft’ (1701246-A7G)
This (Comp 10) is the ‘Power Take-Off Gear’. This gear is also fixed to the FAW J6P Right Centre Shaft and spins constantly with it (anytime the clutch is engaged).

The Hydraulic Logic is its application. This gear (Comp 10) is what meshes with the idler gear of the PTO unit (which is bolted to the side of the gearbox housing). When the driver engages the PTO, this gear transmits the engine’s power *out* of the gearbox to run the hydraulic pump for the dump body.

Its position on the FAW J6P Right Centre Shaft is critical. Because this shaft spins whenever the clutch is engaged (even when the main gearbox is in neutral), it allows the dump truck to be stationary but still use the engine’s power to run the hydraulic pump and raise the dump bed. This functionality is a hallmark of the FAW J6P Right Centre Shaft design.

Core 4: The “Bearing & Retention” Logic (The Mounts)

This final group is responsible for supporting the entire FAW J6P Right Centre Shaft assembly, holding it in its precise location and allowing it to spin smoothly under immense radial and axial loads.

1. The “Bearing” Group (Comp 2, 13)
This includes: ‘Cylindrical roller bearing’ (Comp 2) and ‘Cylindrical roller bearing with stop ring’ (Comp 13). These are the main bearings for the FAW J6P Right Centre Shaft, supporting it at the front and rear of the gearbox case.

The Roller Bearing Logic is used for its superior strength. Unlike ball bearings, roller bearings have a larger contact patch, making them ideal for handling the extremely high *radial* loads (the “pushing” force between gears) inside a heavy-duty gearbox. The ‘stop ring’ on Comp 13 is a snap ring on the *outer* race, which “locates” the bearing in the housing bore.

2. The “Retention” Group (Comp 1, 12, 14, 15)
This group includes: ‘Snap ring – centre shaft rear bearing’ (Comp 1), ‘Snap ring – reduction gear’ (Comp 12), ‘Baffle plate – centre shaft front bearing’ (Comp 14), and ‘Hexagon head bolt with guide neck’ (Comp 15).

The Axial Control Logic is their function. The ‘Snap rings’ (Comp 1, 12) fit into grooves on the FAW J6P Right Centre Shaft itself to lock bearings or gears (like the ‘Reduction gear’, Comp 11) in place, preventing any “axial” (in-and-out) movement.

The Baffle Plate Logic (Comp 14) is critical. This plate, held by the ‘Hexagon head bolt’ (Comp 15), acts as a “retainer” for the front bearing (Comp 13). It also functions as an “oil slinger” or “baffle,” directing lubricating oil into the bearing race while also preventing excessive “splash” from reaching the front seal. This entire group ensures the FAW J6P Right Centre Shaft stays perfectly positioned.

FAW J6P Right Centre Shaft: Complete 15-Part Breakdown

The following table provides the complete, detailed breakdown of all 15 component types in the FAW J6P Right Centre Shaft assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Right Centre Shaft are defined by its role as one of two “countershafts” in a high-torque, twin-countershaft gearbox design.