FAW Left Hand Wing Mirror: The 3 Critical Secrets for Superior Visibility

Welcome to this critical safety analysis of the FAW Left Hand Wing Mirror (Electric). This is the complete, 3-component-type, “multi-logic” visibility system for the FAW Jiefang CA4251P66K24T1A3E5 6×4 diesel semi-trailer tractor. This assembly is the driver’s single most important safety tool, providing a clear field of vision to manage the vehicle’s massive blind spots.

The “logic” of the FAW Left Hand Wing Mirror is far more advanced than a simple piece of glass. It is an “all-weather” system combining a “dual-view” mirror (main flat glass and lower convex glass), integrated “electric actuators” (for remote adjustment), and a powerful “heating element” (for de-icing and de-fogging). This assembly is designed to provide perfect, reliable visibility in all conditions.

This in-depth guide is an essential resource for collision repair specialists, technicians, and parts managers. We will deconstruct the entire FAW Left Hand Wing Mirror assembly into its 3 distinct serviceable component types. We will analyze the “dual-view” and “breakaway” logic of the main ‘Mirror Assy’ (Component 1), the “aero-finish” logic of the ‘Decorative Cover’ (Component 2), and the critical “high-torque” fastener logic (Component 3) that anchors this system to the door.

Core 1: “Dual-View” & Structural Logic (Component 1) (The “Longer” Module)

The ‘Left outer rear-view mirror assy’ (8202015AA01) is the primary component and serviceable unit. This is the “black box” of the FAW Left Hand Wing Mirror system. It is a complete assembly that includes the structural arm, the main housing, the mirror glass, and all internal electronics (motors and heater).

1. The “Dual-View” Safety Logic:

The “logic” of a commercial truck mirror is “dual-view.” This component houses two separate pieces of glass, each with a specific safety logic:

• Main Mirror (Flat): The large, upper glass is a “flat” 1:1 mirror. Its “logic” is to provide an accurate, true-to-life reflection, allowing the driver to precisely judge the distance and speed of vehicles in adjacent lanes.
• Convex Mirror (Wide-Angle): The smaller, lower glass is “convex” (curved). Its “logic” is to “bend” the light, capturing a much wider field of view. This is the critical “blind-spot” mirror, allowing the driver to see their own “steer” and “drive” tires, as well as cars that are hidden from the main mirror.

2. The “Structural Arm” Logic (Rigidity & Breakaway):

The FAW Left Hand Wing Mirror is a “long-arm” or “West-Coast” style mirror. The arm that holds the mirror head is a critical structural component.

Rigidity Logic: The arm is cast from heavy-duty aluminum or steel. Its “logic” is to be completely rigid. At highway speeds, “wind buffeting” on the large mirror head creates immense vibration. This rigid arm, combined with the 5-bolt fastener system (Component 3), is what prevents the glass from “shaking” and becoming an unusable, blurry mess.

Breakaway Logic: The arm is designed to “fold” or “break away.” Its “logic” is “sacrificial.” In a minor collision (like striking a post or another mirror), the arm is designed to “fold” in, absorbing the impact and preventing the mirror’s mounting bolts from *ripping* a hole in the ‘Front Door’ (Assembly 683) sheet metal.

Core 2: The “All-Weather” Electric Logic (Implicit in Component 1)

The “Electric” (电动) designation in the original diagram refers to the two key electronic systems built *inside* the ‘Mirror Assy’ (8202015AA01). These are the “comfort and safety” logic of the FAW Left Hand Wing Mirror.

1. Electric Actuator Logic (Adjustment):

Inside the mirror housing are two small, 24V DC electric motors (actuators). The “logic” of this system is “remote adjustment.” The driver uses the ‘Electric rear view mirror control switch’ (from Assembly 577) to precisely aim the *main* mirror glass (up, down, left, right) from the safety and comfort of their seat. This “logic” is essential for multi-driver fleets, allowing each driver to set their mirrors perfectly before starting a trip.

2. Electric Heater Logic (De-Icing):

Laminated to the *back* of the main mirror glass is a “resistive heating element,” just like a rear window defroster. The “logic” of this system is “all-weather visibility.” In fog, snow, ice, or heavy rain, the driver can activate this heater. It quickly warms the glass, evaporating mist, melting ice, and ensuring the driver’s most critical safety view is *always* clear.

These internal components (the heated glass plate, the motor pack) are the true “serviceable units” *within* the main ‘Mirror Assy’, and are often sold as separate repair parts.

Core 3: The “Aero-Finish” & Fastener Logic (Components 2 & 3)

This final group of components details the “installation” and “finishing” logic for the FAW Left Hand Wing Mirror.

Component 2: ‘Left lower fixed base decorative cover’ (8202021-A01): This is the “aesthetic” component. Its “logic” is to provide a clean, “automotive-grade” finish. It is a “scuff plate” or “cover” that snaps on *after* the mirror is installed, *hiding* the five mounting bolts (Component 3) from view.

This cover also has an “aerodynamic” logic. By “smoothing over” the bolt heads and mounting flange, it prevents high-speed air from “whistling” as it passes over, which is a key part of the cab’s “anti-NVH” (Noise) design.

Component 3: ‘Inner hexagon cylindrical head combination screw’ (T2180630F6) – Qty 5: This is the “fastener logic.”

• “Inner Hexagon” Logic: (Allen head) This is a “high-torque” logic, allowing a technician to apply the very high, precise clamping force needed to anchor the heavy mirror.
• “Combination” Logic: This (组合) means the screw has a *captive, pre-attached lock washer*. This is the “anti-vibration” logic. It “bites” into the metal, preventing the 5 bolts from *ever* vibrating loose. This is what guarantees the FAW Left Hand Wing Mirror remains rigid and rattle-free.

FAW Left Hand Wing Mirror Parts List & Specifications

The following table provides the complete, detailed breakdown of all 3 component types identified in the FAW Left Hand Wing Mirror assembly for the FAW CA4251P66K24T1A3E5 tractor.

Specifications

The specifications for the FAW Left Hand Wing Mirror are defined by its function as a multi-logic, “all-weather” electronic visibility system.