Conjunto de pedal de freio e embreagem FAW: Uma análise especializada de 22 Componentes críticos

Bem-vindo a esta análise técnica especializada do Conjunto de pedal de freio e embreagem FAW (Conjunto 541). Este é o completo, multi-part driver control interface for the FAW Jiefang CA4251P66K24T1A3E5 6×4 trator semirreboque diesel. This assembly is the critical link translating driver intentions into mechanical, pneumático, and hydraulic actions.

O Conjunto de pedal de freio e embreagem FAW é um complexo, firewall-mounted unit. Isso é “lógica” é triplo: it provides the mechanical levers for the driver’s feet (‘Brake pedal assy’ and ‘Clutch pedal assy’), it provides the “mestre” actuation for the hydraulic clutch (‘Clutch master cylinder assy’), and it provides the proportional “lógica” for the air brake system (‘Válvula de freio & connecting head assy’).

This in-depth guide is an essential resource for professional technicians and fleet managers. Vamos desconstruir todo Conjunto de pedal de freio e embreagem FAW em seu 22 componentes reparáveis, including the main ‘Pedal bracket’, the ‘Pedal shaft’, the ‘Clutch switch assembly’, the ‘Stop light switch assembly’, and all associated hardware. Entendendo isso Conjunto de pedal de freio e embreagem FAW is key to diagnosing many braking and shifting issues.

Core Structure: The ‘Pedal Bracket’ (3504031-91C)

A base de todo Conjunto de pedal de freio e embreagem FAW is the ‘Pedal bracket’ (3504031-91C). Este é o serviço pesado, fabricated steel “esqueleto” that bolts directly to the truck’s firewall. Its function is to provide a rigid, un-flexing mount for all the other components.

This bracket must be incredibly strong, as it has to withstand the full force of a “panic stop,” where the driver may exert hundreds of pounds of force on the brake pedal. Any flex in this bracket would translate to a “esponjoso” ou “macio” pedal feel, reducing braking confidence.

This bracket is also the “lógica” hub for the pivot system. It is precision-bored to accept the ‘Pedal shaft’ (3504032-50A). This single, hardened steel shaft acts as the main pivot axle for *both* the ‘Brake pedal assy’ and the ‘Clutch pedal assy’. The pedals pivot on this shaft via the ‘Bushing-pedal shaft’ (3504061-50A), which is a low-friction, replaceable wear component. O inteiro Conjunto de pedal de freio e embreagem FAW is built upon this bracket.

O “Brake Logic”: Válvula (3514010-50A) and Pedal (3504070-91C)

O “Pedal de freio” lado do Conjunto de pedal de freio e embreagem FAW is a pneumatic control system. O ‘conjunto do pedal do freio’ (3504070-91C) is the steel lever the driver’s foot presses. Quando pressionado, this pedal’s primary job is to actuate the ‘Brake valve & connecting head assy’ (3514010-50A).

This valve is the “lógica” of the air brake system. It is a **proportional valve**. It takes the high-pressure (120+ PSI) air from the truck’s main tanks and “metros” it out to the brake lines based on *how far* the driver has pressed the pedal.

• **Pedal 20% pressed:** Valve releases ~30 PSI to the brakes.
• **Pedal 100% pressed:** Valve releases the full 120 PSI for a panic stop.

This proportional logic is what allows the driver to “pena” the brakes. The ‘Return spring-brake pedal’ (3504036-50A) is a heavy-duty spring that ensures the pedal (and thus the valve) returns to the “zero” position instantly when the driver’s foot is removed, releasing the brakes. A failed or “pegajoso” Conjunto de pedal de freio e embreagem FAW‘s brake valve is a critical safety failure.

O “Clutch Logic”: Cilindro mestre (1602110-76C) and Pedal (1602020-76C)

O “Clutch Pedal” lado do Conjunto de pedal de freio e embreagem FAW is a hydraulic control system. The ‘Clutch pedal assy’ (1602020-76C) is the steel lever for the driver’s left foot. Quando pressionado, it pivots on the ‘Pedal shaft’ and pushes a rod.

This rod actuates the ‘Clutch master cylinder assy’ (1602110-76C). Este é o “lógica” of the clutch control. É um pequeno, hydraulic pump. It takes the driver’s mechanical push and converts it into high-pressure *hydraulic* fluid (fluido de freio). This fluid is fed from the ‘Clutch master cylinder oil cup assy’ (1602100-50A), which is the plastic fluid reservoir.

This hydraulic pressure is then sent *out* of the cab, through a hose (veja Montagem 139), and into the “Clutch Booster.” The booster then uses this small hydraulic signal to control a large *pneumatic* (ar) cilindro, which provides the “power assist” to disengage the heavy-duty clutch. A failure of this master cylinder, or air in the line, resultará em um “morto” pedal that goes to the floor, leaving the driver unable to shift. Esta parte do Conjunto de pedal de freio e embreagem FAW is essential for operating the vehicle.

The Electronic Logic: Interruptores (3720010-A01 & 3754030-76C)

O Conjunto de pedal de freio e embreagem FAW is not just mechanical; it is also an electronic “entrada” system for the truck’s ECU (Unidade de controle do motor).

**’Stop light switch assembly’ (3720010-A01):** This is the brake light switch. It is a simple plunger switch that is activated by the ‘Brake pedal assy’ (3504070-91C) as soon as it is pressed. Isso é “lógica” is to instantly turn on the truck’s (and trailer’s) brake lights. A failure of this switch is a major safety hazard.

**’Clutch switch assembly’ (3754030-76C):** This is the clutch pedal sensor, mounted on the ‘Clutch switch bracket assy’ (1602250-76C). This switch’s “lógica” is vital for the truck’s computer. It sends a signal to the ECU the moment the driver presses the clutch. The ECU uses this signal to:

• Instantly disengage the Cruise Control.
• Instantly disengage the Engine Brake / Jake Freio.
• (Em alguns modelos) Enable the “start-interlock” (preventing the engine from starting unless the clutch is pressed).
• (On automated models) Signal the engine to briefly cut fuel for a smoother, faster shift.

Selos, Pins, e fixadores

O inteiro Conjunto de pedal de freio e embreagem FAW is designed for a high-vibration, high-use environment. The ‘Sealing gasket-pedal bracket’ (3504033-50A) is the large foam or rubber gasket that seals the entire ‘Pedal bracket’ (3504031-91C) against the cab firewall, blocking noise, aquecer, and fumes.

The system is held together by a series of fail-safe pins and high-tensile fasteners. The ‘Cotter pin’ (Q436150) and ‘Cotter pin’ (Q5002016) are used on the ‘Clevis pin’ (Q5100825) and ‘Threaded pivot-brake pedal’ (3504062-50A). Esse “castle-nut-and-pin” logic is a positive mechanical lock, ensuring these critical pivot points can *never* vibrate apart.

‘Hex head flange lock nuts’ (CQ32608) and various ‘Combination bolts’ (CQ1460620) e 'Parafusos de cabeça sextavada’ (CQ1500620) with ‘Spring gaskets’ (Q40306, Q40308) are used to secure all the components to the main bracket. Every piece of hardware in the Conjunto de pedal de freio e embreagem FAW is a safety-critical, fixador à prova de vibração.

FAW Brake Pedal And Clutch Pedal Assembly Parts List

A tabela a seguir fornece o completo, detalhamento de todos 22 components identified in the ‘Brake Pedal And Clutch Pedal Assembly’ (541) diagrama para o trator FAW CA4251P66K24T1A3E5.

Especificações Técnicas e Contexto de Montagem

As especificações para o Conjunto de pedal de freio e embreagem FAW are defined by its dual-function “lógica” as both a pneumatic brake controller and a hydraulic clutch master. Esse Conjunto de pedal de freio e embreagem FAW is a safety-critical driver interface.