FAW J6P Rear Baffle Plug: Deconstructing 3 Critical Parts for Flawless Cab Sealing

Welcome to this in-depth deconstruction of the FAW J6P Rear Baffle Plug system, a critical component set for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck. This guide analyzes the 3 distinct plug types used to seal the cab. These parts are essential for environmental protection and operator comfort.

The FAW J6P Rear Baffle Plug components are not simply cosmetic covers. They are high-tolerance elastomeric seals. These plugs are engineered to fill manufacturing access holes in the cab’s sheet metal, creating an impermeable barrier. This guide will break down the three specific plug types, their materials, and their critical role in preventing water, dust, and noise intrusion.

Core 1: The ‘Primary Cavity Seal’ Logic (The Main Plug)

This component is the namesake of the FAW J6P Rear Baffle Plug system. It is a specific, likely non-symmetrical plug designed to seal a primary access or manufacturing hole in the rear cab structure.

1. Component: ‘Plug – Rear Baffle’ (5613163-A01) – Qty 1
This (Comp 1) is the main sealing plug for the rear baffle. Its single quantity and specific name suggest it is designed for one particular, large, or irregularly shaped aperture on the cab’s rear wall.

The Manufacturing Logic is the most probable reason for the hole’s existence. During the assembly of the J6P cab, or more specifically during the electro-deposition (e-coat) anti-corrosion process, holes are required. These holes allow priming fluids to coat the interior of the cab’s box sections and allow air to escape.

Once this process is complete, the hole is a liability. The FAW J6P Rear Baffle Plug (Comp 1) is the component designed to permanently and hermetically seal this access hole after painting, preventing any future intrusion.

The Sealing Logic is critical. This plug is manufactured from a high-grade elastomeric material, such as EPDM rubber, which is chosen for its extreme durability, resistance to temperature changes, UV light, and chemicals.

The design of this FAW J6P Rear Baffle Plug likely features multiple-flange ridges or a “Christmas tree” profile. This design ensures that when the plug is pushed into the hole, the ridges flex and then expand on the other side. This creates a high-pressure, mechanical lock and a 360-degree watertight seal that cannot be dislodged by vibration.

Core 2: The ‘Standardized Aperture’ Logic (Round Plugs)

This group represents the smaller, standardized plugs that complement the primary component, sealing other holes on both the front and rear cab structures.

1. Component: ‘Round Plug C – Front Baffle’ (5302808-A01) – Qty 2
This (Comp 2) is a standardized, circular plug. The name ‘Front Baffle’ indicates its intended location, yet it is part of the overall FAW J6P Rear Baffle Plug system (139). The quantity of 2 suggests a symmetrical application, such as one on the driver’s side and one on the passenger’s side firewall or floor pan.

2. Component: ‘Round Plug – Rear Baffle’ (5613161-A01) – Qty 1
This (Comp 3) is another circular plug, but with a different part number, indicating a different diameter or specification from Comp 2. Its singular quantity suggests it seals one specific hole on the rear baffle.

The Standardization Logic is key here. Using simple, round holes is far cheaper for manufacturing than creating custom-shaped ones. These plugs are used to seal holes drilled for optional equipment. For example, a cab may be stamped with holes for a wiring harness or an auxiliary air line that the CA3250P66K2L1T1E model does not use. These plugs provide a fast, cheap, and effective way to seal these unused option ports.

The Acoustic Isolation Logic is a vital secondary function. These plugs are not just for water and dust. An open hole in the cab’s firewall (Comp 2) or rear wall (Comp 3) would allow an immense amount of engine, transmission, and road noise to enter the cab.

The soft, dense rubber of the FAW J6P Rear Baffle Plug components acts as an effective sound deadener. It absorbs vibrations from the sheet metal and blocks the passage of airborne sound waves, contributing significantly to the quietness of the cab and reducing operator fatigue.

Core 3: The ‘Service & Failure’ Logic (The System)

The service life and failure modes of the FAW J6P Rear Baffle Plug system are critical for long-term maintenance. These are not ‘fit-and-forget’ parts in a harsh environment.

The Failure Mode Logic is based on material degradation. Over a service life of many years, the elastomeric plugs are subjected to constant vibration, heat cycles from the engine and sun, and exposure to ozone. This will eventually cause the rubber to harden, become brittle, and crack.

A failed FAW J6P Rear Baffle Plug will shrink or crack, breaking the seal. The first sign for a driver is often a water leak, with water dripping inside the cab after rain or a wash. Other symptoms include a noticeable increase in road or engine noise, or a draft. A technician inspecting a “phantom” water leak should always check the integrity of these plugs first.

A secondary failure mode is the plug being physically dislodged. This can happen from a high-pressure washer being aimed directly at the plug, or from debris striking it from underneath the truck.

The Service Logic is simple replacement. These plugs are not repairable. They are designed to be a one-time-use item. If a plug is removed for any reason (e.g., to run a new wire), it should never be reused. The act of removal deforms the sealing ridges, and it will not provide a reliable seal.

A technician must replace it with a new, corresponding FAW J6P Rear Baffle Plug from this system. This ensures the cab’s environmental and acoustic integrity is restored to factory standards. The inclusion of “Front Baffle” parts in this system kit (139) ensures a technician has all the common plugs for a cab sealing job.

FAW J6P Rear Baffle Plug: Complete 3-Part Breakdown

The following table provides the complete, detailed breakdown of all 3 component types in the FAW J6P Rear Baffle Plug assembly (System 139) for the FAW Jiefang CA3250P66K2L1T1E 6×4 dump truck.

Core Specifications

The specifications for the FAW J6P Rear Baffle Plug system are defined by its role as a complete sealing solution for the cab body-in-white.