FAW J6P Sub-Box Drive Gear: Deconstructing 6 Critical Parts for Flawless Range Shifting

Welcome to this critical deconstruction of the FAW J6P Sub-Box Drive Gear, the primary input component for the auxiliary “range” box in the CA10TA160M transmission. This assembly is vital for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This guide deconstructs the 6 components of the FAW J6P Sub-Box Drive Gear for technicians.

The FAW J6P Sub-Box Drive Gear is the crucial “bridge” between the main 5-speed gearbox and the 2-speed auxiliary (Hi/Lo) section. It takes 100% of the power from the mainshaft (Second Axis) and delivers it to the range-box gear set, allowing the 10-speed transmission to function.

Core 1: The “Input Drive” Logic (The FAW J6P Sub-Box Drive Gear)

This group represents the primary “working” component of the FAW J6P Sub-Box Drive Gear assembly. Its logic is to receive 100% of the power from the main 5-speed shaft (Second Axis) and transmit it into the 2-speed auxiliary (range box) gear set.

1. Component: ‘Input gear – auxiliary box’ (1701351-A7G)
This (Comp 5) is the heart of the FAW J6P Sub-Box Drive Gear. It is a single, heavy-duty gear, precision-machined from high-strength, case-hardened steel to withstand the full, multiplied torque from the main gearbox.

The Input Spline Logic is its “receiving” function. The *internal* bore of this gear is splined. These splines mate perfectly with the external splines on the *rear* of the ‘Second Axis’ (mainshaft). This creates a solid, non-slip connection.

Therefore, the FAW J6P Sub-Box Drive Gear (Comp 5) spins at the exact same speed as the mainshaft. If the driver has selected “3rd gear” in the main box, this gear is spinning at 3rd-gear-speed. This is the “input” to the auxiliary box.

The External Drive Logic is its “transmitting” function. The *external* teeth of this gear are in constant mesh with the planetary gear set or idler gears of the auxiliary (Hi/Lo) section. This gear is what physically drives the range box.

This component is the single point of power transfer between the two main sections of the gearbox. A failure of the FAW J6P Sub-Box Drive Gear, such as stripped internal splines or broken gear teeth, would completely sever the link between the main gearbox and the driveshaft. This would result in a total loss of drive in all gears, even if the main 5-speed box is functioning perfectly. Its integrity is absolutely critical to the entire drivetrain.

Core 2: The “Bearing & Support” Logic (The Mounting System)

A gear transmitting this much power cannot simply “float” on the shaft; it must be rigidly supported. This group holds the FAW J6P Sub-Box Drive Gear (Comp 5) in its exact, precise location, which is critical for the FAW J6P Sub-Box Drive Gear assembly’s alignment.

1. Component: ‘Deep groove ball bearing with stop ring’ (6018NR/YAB-2)
This (Comp 3) is the main bearing for the FAW J6P Sub-Box Drive Gear. This is a large, heavy-duty, single-row ball bearing designed to handle both high *radial* loads (the “pushing” force from the gear mesh) and moderate *axial* loads (thrust).

The Support Logic is straightforward. The *inner* race of this bearing (Comp 3) is pressed onto the main hub of the ‘Input gear’ (Comp 5). The *outer* race is pressed into a precisely-machined bore in the gearbox’s “mid-plate” or main housing. This bearing is what allows the entire FAW J6P Sub-Box Drive Gear assembly to spin smoothly at high speeds.

The Stop Ring Logic is the critical “positioning” feature, indicated by the ‘NR’ in the part number. This bearing has a “stop ring” (a snap ring) pre-installed in a groove on its *outer* race. This ring fits into a corresponding groove in the gearbox housing bore.

This stop ring physically *locks* the bearing in place, preventing the entire FAW J6P Sub-Box Drive Gear assembly from moving fore or aft (axially). This guarantees its perfect alignment with the auxiliary box gear train and is a key component for managing drivetrain thrust loads.

Core 3: The “Retention & Positioning” Logic (Hardware)

This final group consists of the specialized plates, rings, and bolts that complete the FAW J6P Sub-Box Drive Gear assembly. Their logic is to lock all the components together as a single, secure unit.

1. The “Retention Plate” Group (Comp 4, 6)
This group includes: ‘Positioning plate – input gear bearing’ (Comp 4) and ‘Hexagon flange bolt’ (Comp 6, Qty 6).

The Retainer Logic is the function of the ‘Positioning plate’ (Comp 4). This is a strong steel plate, often shaped like a “C” or a full circle, that bolts to the gearbox housing. It is installed *over* the main bearing (Comp 3).

This plate acts as a “hard stop” or “retainer.” It provides a secondary, mechanical lock (in addition to the bearing’s stop ring) to ensure the bearing’s outer race can never “walk” or be pushed out of its bore under extreme reverse-load or thrust conditions. This is a critical “belt-and-braces” design for the FAW J6P Sub-Box Drive Gear.

The Flange Bolt Logic (Comp 6) is in the fastener design. These six ‘Hexagon flange bolts’ (Q1841025S) have a built-in washer (a flange). This flange distributes the clamping load of the retainer plate (Comp 4) evenly and provides a wide surface area that resists loosening from the constant, high-frequency vibrations of a diesel drivetrain.

2. The “Internal Snap Ring” Group (Comp 1, 2)
This group includes: ‘Positioning ring – snap ring’ (Comp 1) and ‘Snap ring – input gear bearing’ (Comp 2).

The Internal Positioning Logic is the function of these two rings. They are used to precisely locate the main bearing (Comp 3) *onto the hub* of the ‘Input gear’ (Comp 5).

The ‘Snap ring – input gear bearing’ (Comp 2) is likely a heavy-duty snap ring that fits into a groove on the gear’s hub. This ring acts as the “back stop” that the bearing’s *inner* race is pressed up against. It sets the bearing’s precise location on the gear.

The ‘Positioning ring – snap ring’ (Comp 1) is then likely installed in a groove on the *other* side of the bearing, “trapping” the inner race. This “sandwich” of (Comp 2) -> (Bearing) -> (Comp 1) locks the bearing onto the FAW J6P Sub-Box Drive Gear, making them a single serviceable unit.

FAW J6P Sub-Box Drive Gear: Complete 6-Part Breakdown

The following table provides the complete, detailed breakdown of all 6 component types in the FAW J6P Sub-Box Drive Gear assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Sub-Box Drive Gear assembly are defined by its function as the sole power input for the gearbox’s auxiliary (range) section.