O guia completo: Cárter de óleo FAW para o trator CA4251P66K24T1A3E5

Bem-vindo ao guia técnico completo do Cárter de óleo FAW (Parte não. 1009010-99C), the critical lubrication reservoir for the FAW Jiefang CA4251P66K24T1A3E5 6×4 trator semirreboque diesel. This assembly is the foundation of the engine’s entire oiling system.

O Cárter de óleo FAW is not just a simple container; it is an engineered system designed to safely store, legal, and manage the engine’s oil supply. It ensures that the oil pump pickup is constantly submerged, even under the extreme conditions of heavy hauling, steep grades, and sharp turns.

Este guia detalhado é um recurso vital para técnicos profissionais, gestores de frota, e especialistas em peças. Vamos desconstruir todo Cárter de óleo FAW assembly into its smallest serviceable units, including the main pan, its complex internal baffling, the gasket, drain plug, e todos os fixadores associados.

Componente principal: The Oil Pan Assembly (1009010-99C)

The largest and most significant component is the ‘Oil Pan Assembly’ (1009010-99C). This is the main reservoir that holds the engine’s entire supply of lubricating oil (often 30+ liters in an engine of this size). It is typically manufactured from stamped, deep-draw steel or cast aluminum. A stamped steel Cárter de óleo FAW offers excellent durability against impacts, while a cast aluminum pan (which this likely is, given the complex internal structure) offers superior rigidity and heat dissipation.

O desenho do Cárter de óleo FAW é crítico. O “reservatório” is the lowest, deepest part of the pan, designed to collect the oil and provide a deep, stable reservoir for the oil pump pickup tube. The entire pan also acts as a passive oil cooler; the hot oil returning from the engine spreads across the pan’s large surface area, and the airflow underneath the truck helps dissipate heat, maintaining the oil’s viscosity and lifespan.

Um danificado Cárter de óleo FAW, whether from a road debris impact or a cracked weld, é uma falha crítica. Even a small leak can quickly drain the engine of oil, leading to catastrophic failure of the crankshaft bearings and turbocharger. A integridade estrutural do Cárter de óleo FAW is fundamental to engine health.

O Selo Crítico: Junta do cárter de óleo (1009031-81D)

The ‘Oil Pan Gasket’ (1009031-81D) is the single component responsible for creating a leak-proof seal between the Cárter de óleo FAW and the engine block’s “bed plate” ou “skirt.” In modern diesel engineering, this is no longer a simple cork or paper gasket.

This part is a high-tech “perfil” junta. It is typically constructed as a rigid steel carrier plate, which has been stamped into the exact shape of the pan’s rail. A high-grade, oil-resistant elastomer (like silicone or FKM) is then precision-molded onto this carrier, with raised “beads” that trace the bolt holes and the perimeter.

This design is vastly superior to older gasket types. The steel carrier prevents the gasket from “squeezing out” ou “extruding” when the 34 pan bolts are tightened. The molded elastomer beads provide a concentrated, high-pressure seal with minimal clamping force, ensuring a durable, resistente a vibrações, and leak-free joint. Esta junta é um item descartável; once it has been compressed, it must be replaced to guarantee a proper seal when servicing the Cárter de óleo FAW.

Internal Baffling: Controlling Oil Surge

The most complex and arguably most important components *within* the Cárter de óleo FAW are its baffles. A 6×4 tractor is subjected to immense G-forces: hard acceleration, heavy braking, and high-G turns. Under these conditions, o 30+ liters of oil would “slosh” ou “surge” violently, like water in a bucket. If this surge momentarily uncovers the oil pump pickup tube, it will suck air. Esse “oil starvation,” even for a fraction of a second, is fatal to an engine, as it will instantly destroy the bearings.

Esse Cárter de óleo FAW features a complex, multi-part baffling system to prevent this. The parts list calls for four ‘Turning Baffles’ (1009026-81D), two ‘Front Intermediate Baffles’ (1009023-81D), and two ‘Rear Intermediate Baffles’ (1009024-81D). This total of eight internal plates creates a “trap” ou “maze” around the oil sump.

The ‘Turning Baffles’ are likely the “walls” that form a box around the sump. They feature small, one-way “trap doors” that allow oil to flow *in* to the sump easily, but prevent it from sloshing *out* during a turn. The ‘Intermediate Baffles’ are plates that run along the length of the Cárter de óleo FAW, controlling the “para frente e para trás” slosh that occurs during braking and acceleration.

These baffles also serve a second function as a “windage tray.” The crankshaft, spinning at thousands of RPM, acts like a giant whisk, creating an oil “cloud” ou “rope” in the crankcase. Esse “windage” robs the engine of power (parasitic loss) and can overwhelm the piston’s oil control rings. These baffles are positioned to strip this oil from the air, allowing it to drain calmly back into the sump. The design of this baffling system is a key engineering feature of the Cárter de óleo FAW.

Service and Monitoring Components

The parts list includes the two primary points of service for the Cárter de óleo FAW. The ‘Oil dipstick assembly’ (1009070-99C) is the only component used for monitoring the oil level. This assembly includes the dipstick itself (a long, flexible metal blade), the tube it sits in, and the O-ring seal on its handle to prevent crankcase pressure from escaping.

O segundo, and most frequently used, service point is the ‘Oil pan drain plug’ (1009022-29D). Este é um serviço pesado, threaded bolt located at the absolute lowest point of the Cárter de óleo FAW. It is designed to allow for the complete drainage of all used engine oil during a service.

Criticamente, this plug is sealed by its own ‘Gasket ring’ (CQ72320). Este é um “arruela de pressão,” typically made of soft aluminum, cobre, or a composite. When the drain plug is tightened, this soft ring “crushes” to form a perfect, liquid-tight seal against the pan. Esta junta é um item descartável. Reutilizando um antigo, work-hardened gasket ring is the #1 cause of a leaking drain plug. Um serviço profissional da Cárter de óleo FAW always includes a new gasket ring.

O sistema de fixação: A Study in Clamping Force

A integridade do Cárter de óleo FAW seal is entirely dependent on its fastener system. The parts list calls for two different bolts: eight units of ‘Hex flange bolt, haste grossa’ (Q1841225) e 26 units of ‘Hex flange bolt, haste grossa’ (Q1840820).

This massive quantity of **34 bolts** is necessary to provide perfectly uniform clamping pressure along the entire perimeter of the gasket. The long, thin rail of a stamped steel or cast aluminum Cárter de óleo FAW is flexible; if fewer bolts were used, the pan would warp between the bolts, criando um “scalloped” leak path. The two different part numbers indicate different bolt lengths or diameters, used for specific locations on the pan (Por exemplo, where it passes over the main bearing cap seals).

Esses “mesa” bolts are critical. The integrated washer head spreads the clamping force over a wide area, preventing the bolt head from cracking the pan’s flange or crushing the gasket unevenly. These bolts must be tightened to a low, specific torque (Por exemplo, 18-25 N · m) in a precise, multi-stage, crisscross pattern to ensure the Cárter de óleo FAW seats correctly.

FAW Oil Pan Parts List

A tabela a seguir fornece o completo, detailed breakdown of all components identified in the ‘Oil Pan’ diagrama para o trator FAW CA4251P66K24T1A3E5. Esta lista é essencial para qualquer serviço da Cárter de óleo FAW.

Especificações Técnicas e Contexto de Montagem

As especificações para o Cárter de óleo FAW are defined by its function as a high-capacity, structural oil reservoir with an advanced internal baffling system.