Thermostat FAW J6P & Pompe à eau: 30 Pièces essentielles pour un contrôle thermique parfait

Bienvenue dans cette déconstruction experte du Thermostat FAW J6P and Water Pump assembly (Chapitre 27). C'est le complet “Gestion thermique” module for the FAW Jiefang CA3250P66K2L1T1E 6×4 tombereau.

C'est un complexe “Assemblage logique” de 30 types de composants, engineered to perform one task: to maintain the engine’s perfect operating temperature (90-100° C) under all load conditions, from a cold start to a heavy uphill pull.

Le “Dual-Circuit Logic” est la clé de cela Thermostat FAW J6P système. Quand le moteur est froid, the ‘Wax-type thermostat assy’ (Comp 3) is *closed*. Ce “Contourner la logique” forces coolant to *bypass* the main radiator and circulate only within the engine block, allowing the engine to warm up rapidly. This reduces wear, improves emissions, and provides faster cab heat. Once the coolant reaches operating temperature (Par exemple, 85° C), the ‘Thermostat’ opens, “clôture” the bypass and “opening” the main circuit, forcing 100% of the coolant to the radiator. This entire process is powered by the ‘Water pump assy’ (Comp 26), le “cœur” du système.

This expert guide is an essential resource for engine technicians, gestionnaires de flotte, et spécialistes des pièces détachées. We will deconstruct the entire 30-component group into its four primary “logique” systèmes: le “Thermal Regulation Logic” (le Thermostat FAW J6P and its housing), le “Fluid Circulation Logic” (the water pump and inlet pipes), le “Coolant Conditioning Logic” (the water filter and shut-off valves), et la critique “Scellage & Plumbing Logic” (all the gaskets, tuyaux, and O-rings) that connect the Thermostat FAW J6P système.

Cœur 1: Le “Régulation Thermique” Logique (The FAW J6P Thermostat)

Ce groupe est le “cerveau” of the entire cooling system. Its logic is to intelligently direct the flow of coolant based on temperature.

1. Composant: ‘Wax-type thermostat assy’ (1306010-29D)
Ce (Comp 3) is the core of the Thermostat FAW J6P assemblée. La liste en appelle à deux (2) of them. Ce “Dual-Thermostat Logic” is a high-performance, fail-safe design. Il fournit un énorme “flow-through” capacité (essential for a heavy-duty engine) and provides redundancy. If one thermostat fails in the “closed” position, the other can still provide enough flow to prevent an immediate, catastrophic overheat.

Le “Wax Motor Logic” is how it works. Ceci est un non-électrique, self-contained unit. A small, laiton “pellet” inside is filled with a special wax that is engineered to melt and expand at a precise temperature (Par exemple, 85° C). As this wax expands, it pushes a small piston, which overcomes a spring and opens the main valve. C'est le “logique” that opens the path to the radiator. As the engine cools, the wax solidifies, and the spring forces the valve shut.

2. Composants: ‘Thermostat body’ (1306021-863) & ‘Thermostat cover’ (1306013-70UN)
Ce (Comp 5 & 2) est le “Housing Logic.” The ‘Body’ is the main cast-iron or aluminum manifold that bolts to the engine. It contains the “by-pass” port. The two ‘Thermostats’ (Comp 3) sit inside this body. La « couverture »’ (Comp 2) est le “capuchon” that bolts to the body, and it contains the main “sortie” port that leads to the radiator. The ‘Gasket-thermostat’ (Comp 4), dont il y en a deux (2), provides the critical “joint statique” that prevents coolant from leaking *around* the closed thermostat, which would defeat the “fast warm-up” logique. L'ensemble Thermostat FAW J6P housing is a critical, high-flow junction.

Cœur 2: Le “Fluid Circulation” Logique (The Water Pump)

Ce groupe représente le “cœur” of the cooling system. Alors que le Thermostat FAW J6P est le “cerveau,” ce composant est le “muscle.”

1. Composant: « Ensemble de pompe à eau’ (1307010-36D)
Ce (Comp 26) est le “Centrifugal Flow Logic.” This is a belt-driven (from the FEAD system) pompe. C'est “logique” is to be a high-volume, relatively low-pressure pump. An internal, multi-bladed “impeller” spins at high speed. It doesn’t “suck” water in; il “slings” it outwards by centrifugal force, creating a low-pressure void at its center (le “entrée”) that draws coolant in, and a high-pressure zone at its edge (le “sortie”) that pushes coolant into the engine block.

Le “Mechanical Seal Logic” is its most critical feature. The pump shaft (which holds the pulley on the outside and the impeller on the inside) must pass *through* the pump housing. UN “garniture mécanique” (a spring-loaded, carbon-and-ceramic ring) is what prevents high-pressure coolant from leaking out. This seal is “water-lubricated.” When this seal eventually wears out, coolant will drip from a “trou d'évacuation” in the bottom of the pump casting. Ce “Weep Logic” is a built-in “failsafe indicator,” telling the technician the pump must be replaced before the bearing fails completely.

2. Composant: ‘Water pump inlet pipe assy’ (1307050-29D)
Ce (Comp 14) est le “Main Suction Logic.” This is the large-diameter pipe that connects the ‘Water pump assy’ (Comp 26) au “sortie” (bas) of the radiator, completing the main cooling circuit. It’s a critical-flow component, securely bolted on (Comp 15) to prevent any air from being sucked into the system.

Cœur 3: Le “Coolant Conditioning & Service” Logique

Ce groupe “logique” est de “filtre” et “chemically treat” the coolant, a feature unique to heavy-duty systems and vital for protecting the Thermostat FAW J6P et moteur.

1. Composant: ‘Water filter assy’ (1307020-29D)
Ce (Comp 17) est le “Conditioning Logic.” This is not just a particle filter. C'est “logique” c'est être un “Bypass Filter” that contains “Supplemental Coolant Additives” (SCA). A small “saigner” of coolant constantly flows through this filter.

Le “SCA Logic” is to slowly release chemicals (like nitrites and molybdates) into the coolant. These chemicals are essential. Ils “plate” the inside of the “wet” revêtements de cylindre, empêcher “cavitation”—a process where tiny, imploding steam bubbles (caused by diesel vibration) act like microscopic jackhammers, eating holes *through* the cylinder liners. This filter’s “logique” is to *prevent* this, making it a critical component for a long engine life.

2. Composant: ‘Water filter shut-off valve’ (1307017-29D)
Ce (Comp 24) est le “Serviceability Logic.” The ‘Water filter’ (Comp 17) is a regular service item. Ce “shut-off valve” (a ball or gate valve) is installed *before* the filter. C'est “logique” is to allow a technician to *stop* the flow of coolant *to the filter*, allowing it to be spun off and replaced *without* draining the entire 30-40L cooling system. This is a massive time- and cost-saving feature.

3. Composant: ‘Heater water drain switch assy’ (1311060-50UN)
Ce (Comp 6) is another “Logique de service.” It is a small drain valve located in the “heater core” circuit (the plumbing that provides heat to the truck’s cab). C'est “logique” is to allow a technician to drain just the heater core circuit for service, or to help bleed air from that circuit.

Cœur 4: Le “Plomberie & Scellage” Logique (Tous les autres)

Ce dernier groupe “logique” is to connect all the components of the Thermostat FAW J6P and water pump system with a 100% leak-proof, joint haute température.

1. Le “Bypass Pipe” Logique (Composant 9)
The ‘Water pump bypass pipe’ (Comp 9) est le “Cold Engine Circuit.” Quand le Thermostat FAW J6P (Comp 3) is *closed*, this is the pipe that re-routes the “chaud” coolant from the engine block *directly* back to the “succion” side of the ‘Water pump’ (Comp 26). Ce “Contourner la logique” is what allows the coolant to circulate (and the cab heater to work) *before* the engine is at operating temperature.

2. Le “Interface” Logique (Composants 18, 20)
The ‘Intermediate connecting pipe’ (Comp 18) and ‘Single-pipe intermediate connecting pipe’ (Comp 20) sont les “Logique d'interface” composants. These are rigid, pre-formed pipes that connect the ‘Thermostat body’ (Comp 5) to the cylinder head or other parts of the block. They are used in tight spaces where a flexible rubber hose would kink, fondre, or rub through.

3. Le “Scellage” Logique (Joints & O-Rings)
This system uses three types of seals. Les « Joints »’ (Comp 4, 8) sont “Static Seals” for flat, non-moving surfaces (comme le Thermostat FAW J6P couverture). The ‘O-rings’ (Comp 10, 19, 25) sont “Dynamic Seals” used to seal the ends of the slip-fit “intermediate pipes” (Comp 9, 18, 20), allowing them to expand and contract with heat. Enfin, the ‘Copper gaskets’ (Comp 12) sont “Crush Washers” for the ‘Hollow bolts’ (Comp 13), creating a high-pressure, metal-on-metal seal.

Thermostat FAW J6P & Water Pump Parts List

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 30 types de composants dans le Thermostat FAW J6P and Water Pump assembly for the FAW Jiefang CA3250P66K2L1T1E 6×4 tombereau.

Spécifications de base

Les spécifications pour le Thermostat FAW J6P and Water Pump assembly are defined by its function as the complete thermal management system for the engine.