- Cidade de Chang Chun, Província de Jilin, China
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Bem-vindo a este guia técnico especializado sobre o Motor de partida FAW (Parte não. 3708010-53D-C00), the high-torque component responsible for “cranking” and starting the massive diesel engine in the FAW Jiefang CA4251P66K24T1A3E5 6×4 trator.
O Motor de partida FAW is a critical assembly that must generate immense torque to overcome the high compression of a large-displacement diesel engine. A failure of this one component renders the entire truck inoperable. O Motor de partida FAW não é uma única parte, but a complex assembly of a high-current electric motor and a mechanical engagement system.
Este guia detalhado é um recurso essencial para técnicos profissionais, gerentes de manutenção de frota, e especialistas em peças. Vamos desconstruir todo Motor de partida FAW assembly and its critical mounting hardware, exploring the internal logic of the solenoid, the Bendix drive, and the high-tensile fasteners that secure it to the engine’s flywheel housing.
The main component is the ‘Starter Motor Assembly’ (3708010-53D-C00). Este é o completo Motor de partida FAW unidade, which is replaced as a single part. Este é um serviço pesado, 24-volt, high-current DC (Direct Current) electric motor. Its function is to convert the battery’s electrical energy into the massive rotational force (torque) needed to spin the engine’s flywheel from a dead stop.
Unlike a car starter, esse Motor de partida FAW is gear-driven. It mounts directly to the engine’s flywheel housing, where its pinion gear can engage the flywheel’s ring gear. The entire assembly is environmentally sealed to protect its sensitive internal components from water, sal de estrada, and dirt, ensuring starting reliability in all weather conditions.
Internamente, o Motor de partida FAW is comprised of two main sub-systems that work in perfect synchrony:
O “músculo” do Motor de partida FAW is a powerful series-wound DC motor. This design is chosen specifically because its torque is inversely proportional to its speed; it produces the absolute maximum torque at zero RPM (stall), which is exactly what is needed to begin turning a cold, heavy diesel engine.
This power comes at a cost: a massive current draw. Quando a chave é girada, esse Motor de partida FAW can draw 800-1000 amplificadores (ou mais) from the 24-volt battery system, a flow of energy that is immense. This current flows through the field coils and the armature via a set of “pincéis” e um “commutator,” which are the primary wear items inside the Motor de partida FAW.
No entanto, this DC motor spins very fast (Por exemplo, 5,000-10,000 RPM) with relatively low torque. The engine’s flywheel needs to be turned very slowly (Por exemplo, 100-200 RPM) but with enormous torque. To solve this mismatch, o Motor de partida FAW contains an **internal planetary gear reduction set**.
The high-speed shaft from the electric motor spins a small “sun” engrenagem. This sun gear is meshed with several “planet” engrenagens, which in turn mesh with a fixed “anel” engrenagem (the outer wall of the gear case). This forces the “planet carrier” (which holds the planet gears) to rotate at a much slower speed, but with massively multiplied torque. The output shaft of this planetary carrier is what ultimately drives the Bendix gear. Esse “gear-reduction” design is what gives the Motor de partida FAW its incredible cranking power.
The solenoid, the smaller cylinder on top of the Motor de partida FAW, performs two critical functions at the same time.
**1. High-Current Relay:** The wire from the ignition key carries only a small (1-2 Amp) sinal. This signal energizes an electromagnet inside the solenoid. This magnet pulls a heavy copper-disc plunger across two massive copper contacts. This completes the main circuit, acting as a heavy-duty relay that allows the 800+ amps to flow from the battery directly to the Motor de partida FAW‘s main windings.
**2. Mechanical Actuator:** As the solenoid plunger is pulled in by the electromagnet, it is also connected to a “alavanca de câmbio” ou “fork.” This lever pivots and forcefully pushes the starter’s drive gear (o “Bendix” ou “pinion” engrenagem) avançar, along a helical spline. This forward motion is what causes the starter’s pinion gear to physically engage and mesh with the teeth of the engine’s large flywheel.
This timing is perfect: the solenoid *first* meshes the gear, and *then* (at the end of its travel) closes the electrical contacts to power the motor. This ensures the motor only spins *after* the gears are fully engaged, preventing them from clashing and stripping.
The Bendix drive has one final, recurso crítico: an **overrunning clutch**. As soon as the engine fires and starts to run (at 600+ RPM), it will spin the flywheel much faster than the Motor de partida FAW is turning it. This clutch is a one-way mechanism. It allows the starter to turn the flywheel, but it “roda livre” in the other direction. This prevents the fast-spinning engine from back-driving the Motor de partida FAW, which would spin the starter’s armature at 50,000+ RPM and cause it to disintegrate from centrifugal force.
The parts list for this Motor de partida FAW assembly focuses entirely on its mounting hardware. This is because the Motor de partida FAW é a “caixa preta” component that is not typically serviced internally. No entanto, its mounting is a critical, alto torque, high-vibration interface.
The list calls for three different ‘Hex flange bolts’:
The three different part numbers indicate that all three bolts have different lengths. This is common for a Motor de partida FAW, as it mounts to a complex, non-flat cast surface (the flywheel housing) and must clear other components. Esses “mesa” bolts are essential, as the integrated washer head spreads the clamping load over a wide area, preventing the bolt from cracking the starter’s aluminum mounting flange.
The list also includes one ‘Hex head flange lock nut’ (Q032614). This implies that one of the starter’s mounting points is a **stud** (a bolt permanently threaded into the flywheel housing) rather than a bolt hole. O Motor de partida FAW slides onto this stud, e isso “Porca da trava do flange” is used to secure it. O “trancar” recurso (prevailing torque design) is critical to prevent this nut from backing off under the intense vibration of the diesel engine.
A tabela a seguir fornece o completo, detalhamento de todos 5 components identified in the ‘Starter Motor’ diagrama para o trator FAW CA4251P66K24T1A3E5. A secure mount is critical to the function of the Motor de partida FAW.
| Marca | Parte não. | Nome da peça | Quantidade |
|---|---|---|---|
| 1 | 3708010-53D-C00 | Conjunto do motor de partida | 1 |
| 2 | Q1841440 | Parafuso de flange sextavado, haste grossa (Tipo padrão) | 1 |
| 3 | Q1841470 | Parafuso de flange sextavado, haste grossa (Tipo padrão) | 1 |
| 4 | Q1841455 | Parafuso de flange sextavado, haste grossa (Tipo padrão) | 1 |
| 5 | Q032614 | Porca de fixação flangeada de cabeça sextavada | 1 |
As especificações para o Motor de partida FAW são definidos por sua função como um motor de alto torque, gear-reduction electric motor. O inteiro Motor de partida FAW assembly is a safety-critical component for vehicle operation.
| Aplicação em veículos | FAW Jiefang CA4251P66K24T1A3E5 6×4 Trator |
| Grupo de Componentes | Motor de partida FAW |
| Conjunto principal P/N | 3708010-53D-C00 |
| Tipo de sistema | Alto Torque, Gear-Reduction DC Starter |
| Voltage System (Típico) | 24Em DC |
| Key Internal Components | Solenóide (Relay/Actuator), Bendix Drive (Pinion Gear), Overrunning Clutch, Planetary Gear Set, DC Armature |
| Sistema de montagem | 3x Flange Bolts (Q184-series), 1x Flange Lock Nut (Q032614) |
| Função Primária | To rotate the engine’s flywheel, overcoming compression to initiate the combustion cycle. |
Peças FAW, incluindo o conjunto do bloco de cilindros, são embalados com cuidado para garantir uma entrega segura. Cada componente é protegido por materiais de proteção para evitar danos durante o transporte. A rede logística garante envios pontuais em todo o mundo, apoiando operações de manutenção eficientes. Abaixo está uma imagem ilustrando a embalagem padrão para peças de caminhão FAW, mostrando a atenção aos detalhes no manuseio e armazenamento.
Esta abordagem de embalagem minimiza o risco de corrosão ou danos por impacto, garantindo que peças como o conjunto do bloco de cilindros FAW cheguem em perfeitas condições. Os clientes podem confiar na logística da FAW para obter qualidade e confiabilidade consistentes.
FAW é um dos maiores e mais antigos fabricantes automotivos da China, com capital social de RMB 35.4 bilhões de yuans e ativos totais de RMB 457.83 bilhão de yuans.
CHINA FAW GRUPO CO., LTDA. (abreviação de FAW), anteriormente China First Automobile Works, pode traçar suas raízes até julho 15, 1953, quando sua primeira montadora começou a ser construída. FAW é um dos maiores e mais antigos fabricantes automotivos da China, com capital social de RMB 35.4 bilhões de yuans e ativos totais de RMB 457.83 bilhão de yuans.
Vendas globais de caminhões pesados na China “cinco seguidas”, vendas de caminhões pesados em todo o mundo “seis seguidas”, vendas de tratores para 16 anos consecutivos líder absoluto na indústria.
