FAW J6P Deflector Plate: Deconstructing 2 Critical Parts for Flawless Airflow Management

This is the essential technical guide to the FAW J6P Deflector Plate, a key aerodynamic component for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This analysis deconstructs the 2 critical component types that create the complete assembly, detailing its function in managing airflow and protecting the cab.

The FAW J6P Deflector Plate is an engineered assembly, often mistaken for simple trim. Its function is twofold: to deflect airflow smoothly around the cab’s rear corner to reduce drag, and to act as a protective “trim cover” for the cab’s side. This guide will analyze the main assembly and its specialized vibration-resistant fasteners.

Core 1: The ‘Aerodynamic & Protection’ Logic (The Main Assembly)

The core of this system is the deflector itself, a large, pre-formed assembly that defines the cab’s rear-side profile.

1. Component: ‘Rear side trim cover assembly’ (5613110-A01) – Qty 1
This (Comp 1) is the complete FAW J6P Deflector Plate assembly. The name ‘assembly’ confirms it is a single, replaceable unit, likely made from a durable, molded ABS plastic or polymer composite. Its dual-name “trim cover” and system name “deflector” describe its two functions.

The Aerodynamic Logic is its primary purpose as a “deflector.” This component is not flat; it is precisely contoured. It catches the high-velocity air moving along the side of the J6P cab and directs it cleanly away from the vehicle.

Without the FAW J6P Deflector Plate, this airflow would strike the gap between the cab and the dumper body, creating a pocket of turbulence and drag. This drag increases fuel consumption. By smoothing this transition, the deflector helps maintain aerodynamic efficiency, which is a critical factor in long-haul operations.

The Protection Logic is its secondary function as a “trim cover.” The CA3250P66K2L1T1E is a dump truck that operates in harsh environments. The FAW J6P Deflector Plate acts as a sacrificial shield.

It protects the cab’s painted sheet metal from high-velocity debris, stones, mud, and water spray kicked up by the front wheels. This prevents paint chipping, abrasion, and the resulting rust, preserving the cab’s structural integrity and resale value.

The Aesthetic Logic is also important. The FAW J6P Deflector Plate covers the cab’s structural seams and mounting brackets, providing a clean, finished, and professional appearance that is characteristic of the J6P line.

Core 2: The ‘Vibration-Proof’ Logic (The Fasteners)

This group represents the hardware used to secure the FAW J6P Deflector Plate to the cab. The choice of fastener is a deliberate engineering decision for reliability in a high-vibration environment.

1. Component: ‘Combination bolt’ (CQ1460616F6) – Qty 3
This (Comp 2) is a specialized fastener. A “combination bolt” is a precision component that comes from the factory with a washer (typically a spring lock washer and/or a flat washer) pre-installed and captive on the bolt shank.

The Vibration-Proof Logic is the single most important reason for using this fastener. A dump truck is subject to constant, multi-axis vibration from the engine, road, and hydraulic systems. On a standard bolt-and-washer setup, this vibration can cause the nut or bolt to loosen, leading to rattling or part failure.

The integrated spring washer on the combination bolt provides constant, unyielding tension. It bites into the bolt head and the mounting surface, effectively “locking” the bolt in place and preventing it from backing out due to vibration. This ensures the FAW J6P Deflector Plate remains secure.

The Service Logic is about efficiency and error-proofing. During assembly or service, the technician does not need to source, hold, and align a separate bolt and washer. The one-piece design is faster to install and makes it impossible to forget the washer, which is a common source of installation error.

The 3-point mounting pattern provides a stable, triangular fixation for the FAW J6P Deflector Plate, distributing the load and vibration forces evenly across the component.

Core 3: The ‘Failure & Serviceability’ Logic

Understanding the wear and failure patterns of the FAW J6P Deflector Plate is key to proper maintenance and diagnosis.

The Failure Mode Logic is primarily external. As a “deflector,” this component is on the front line. The most common cause of failure is impact. This includes stones and debris at high speed, scraping against obstacles on a narrow work site, or spillage from the dumper body.

These impacts will cause the plastic housing of the FAW J6P Deflector Plate (Comp 1) to crack, shatter, or break away from its mounting points. While cosmetically damaging, this is a sacrificial failure that protects the more expensive cab sheet metal.

A secondary failure mode is vibration fatigue. If the combination bolts (Comp 2) are ever removed and re-used, they may lose their locking tension. This can allow the deflector to vibrate, which will enlarge the mounting holes in the plastic assembly, leading to a rattling noise and eventual component failure.

The Service Logic is designed for simple replacement. The FAW J6P Deflector Plate is not repaired; it is replaced as a single unit (5613110-A01). A technician simply removes the three combination bolts to detach the old, damaged assembly.

For a reliable, long-lasting repair, it is critical to use new combination bolts (CQ1460616F6) for the installation. Re-using the old bolts is not recommended, as their anti-vibration properties are compromised after their first use. New bolts guarantee the new deflector is mounted with the correct, vibration-proof torque and tension.

FAW J6P Deflector Plate: Complete 2-Part Breakdown

The following table provides the complete, detailed breakdown of all 2 component types in the FAW J6P Deflector Plate assembly (System 138) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Deflector Plate are defined by its dual role as an aerodynamic deflector and a protective trim component.