FAW J6P Gearshift Guard: Breaking Down 3 Critical Parts for Flawless Cabin Integration

Welcome to this essential teardown of the FAW J6P Gearshift Guard for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This is not just a piece of trim; it is a critical interface and storage module. This guide breaks down the 3 core components that form the complete assembly for flawless service.

The FAW J6P Gearshift Guard is a multi-function component that is central to the cab’s interior. It serves several crucial functions: it acts as a protective housing for the gearshift linkage, it provides vital sound and thermal insulation from the transmission tunnel, and it integrates essential, at-hand storage for the driver.

In the high-vibration environment of a CA3250P66K2L1T1E dump truck, a component like this must be engineered for extreme durability. A poorly designed guard will rattle, squeak, and transmit excessive heat and noise into the cab, leading to driver fatigue and complaints. This deconstruction will analyze the main guard (5305011-B27) and its integrated storage box (5305021-B27).

We will explore the logic behind its material selection (typically high-impact, textured PC-ABS), its structural mounting points, and the way its components are assembled. For a technician, understanding the FAW J6P Gearshift Guard is key to performing interior service, diagnosing noise, vibration, and harshness (NVH) issues, or replacing damaged parts correctly.

Core 1: The “Structural Housing” Logic (The Main Guard)

This is the largest component and the foundation of the FAW J6P Gearshift Guard. It forms the visible, aesthetic “console” that surrounds the gear lever.

1. Component: ‘Gearshift Guard’ (5305011-B27) – Qty 1
This (Mark 1) is the main structural housing. It is a large, complex, injection-molded part that is precisely shaped to fit the cab’s floor panel and the lower dashboard.

The Material Logic: This guard is not made of simple, flimsy plastic. It is molded from an engineered thermoplastic, typically a PC-ABS (Polycarbonate / Acrylonitrile Butadiene Styrene) blend. This material is chosen for its superior combination of properties: high impact strength (to resist cracking from boots or tools), high-temperature resistance (to withstand heat from the transmission tunnel), and UV stability (to prevent fading).

The Acoustic Logic: A primary, unseen function of the FAW J6P Gearshift Guard is noise, vibration, and harshness (NVH) control. The large surface area of the guard acts as an acoustic barrier. It is often backed with a layer of sound-deadening felt or foam (not listed, but part of the assembly) to absorb and block transmission gear whine and road noise from entering the cab.

The Thermal Logic: The transmission tunnel on a heavy-duty truck can become extremely hot. This FAW J6P Gearshift Guard acts as a heat shield, protecting the driver’s legs from radiant heat and helping the climate control system operate more efficiently.

The Aesthetic Logic: This component is a major part of the cab’s interior design. The surface is given a “technical grain” or texture (a process done inside the injection mold) that makes it resistant to scratches, scuffs, and fingerprints. This texture also reduces glare, which is a key safety consideration.

The Service Logic: This main guard is the part that takes the most abuse. It is often cracked by heavy objects or broken during dashboard service. A technician replacing the 5305011-B27 must carefully disconnect the storage box (Core 2) and any underlying electrical connectors (like the Hi/Lo range switch) before unbolting the main guard from the floor.

Core 2: The “Utility” Logic (The Storage Box)

This component is a sub-assembly that is integrated directly into the main guard, providing essential, at-hand storage for the driver.

1. Component: ‘Gearshift Guard Storage Box’ (5305021-B27) – Qty 1
This (Mark 2) is the storage box module. The note “(配备储物盒)” or “with Storage Box” confirms this is a key feature of the FAW J6P Gearshift Guard. This box is typically mounted in the rear section of the main guard, accessible to the driver.

The Ergonomic Logic: This box is designed for “at-a-glance” utility. It provides a convenient, secure place for the driver to store essential items like logbooks, pens, keys, or a phone, preventing them from sliding around the cab.

The Construction Logic: This box is molded from the same durable PC-ABS material as the main FAW J6P Gearshift Guard to ensure a perfect color and texture match. It is often designed with a non-slip rubber mat at the bottom to prevent items from rattling.

The Integration Logic: This component is not just glued in; it is designed to be mechanically fastened *to* the main guard (Core 1). It uses tabs, clips, or its own set of small screws (not detailed in this diagram) to create a single, solid assembly. This two-piece construction (guard + box) is often simpler and stronger to manufacture than molding one, extremely complex part.

The Service Logic: A common failure is a cracked storage box, or the box itself coming loose from the main guard. A technician would service this by first removing the entire FAW J6P Gearshift Guard assembly from the floor, then turning it over to access the fasteners that secure this storage box (5305021-B27) to the main guard (5305011-B27).

Core 3: The “Mounting” Logic (The Fasteners)

These are the critical fasteners that secure the entire FAW J6P Gearshift Guard assembly (Core 1 and 2) to the cab’s floor panel or transmission tunnel.

1. Component: ‘Cross recessed pan head combination screw’ (Q2360616F6) – Qty 3
This (Mark 3) is a set of three specific, high-reliability screws. The small quantity suggests they are for key structural mounting points, supplemented by hidden clips.

The Combination Screw Logic: The name ‘Combination Screw’ (组合螺钉) is critical. It means each screw (Q2360616F6) has a pre-installed, captive washer (likely a spring lock washer and a flat washer). This is a non-negotiable feature for a high-vibration environment.

This design ensures that the locking washer is present every time and exerts constant tension. This tension prevents the FAW J6P Gearshift Guard from vibrating loose, which is the number one cause of interior squeaks and rattles.

The Head Logic: “Cross recessed pan head” (十字槽平圆头) specifies a Phillips drive with a low-profile, wide head. This pan head distributes the clamping load over a wider area of the plastic guard, preventing the screw from cracking the mounting boss or pulling through the hole.

The Service Logic: When a driver reports a “loose” or “rattling” FAW J6P Gearshift Guard, a technician’s first action is to locate and check the torque on these three screws. They are often hidden under small cosmetic caps or beneath the storage box’s rubber mat. They must be tight, but not over-torqued, as this could strip the floor-pan threads.

FAW J6P Gearshift Guard: Complete 3-Part Breakdown

The following table provides the complete, detailed breakdown of all 3 component types specified for the FAW J6P Gearshift Guard system on the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Gearshift Guard are defined by its role as a structural, acoustic, and utility component of the cab interior.