Ensemble de boîtier avant FAW: Pourquoi ces 24 Les pièces critiques sont essentielles à l’intégrité du moteur

Bienvenue dans ce guide technique critique sur le Ensemble de boîtier avant FAW. C'est le complet “front cover” et “timing gear case” assemblage pour le FAW Jiefang CA4251P66K24T1A3E5 6×4 tracteur semi-remorque diesel. This component is the structural face of the engine.

Le Ensemble de boîtier avant FAW est un complexe, precision-machined casting that performs multiple vital functions. It covers and seals the engine’s entire timing gear train, provides the mounting points for numerous critical accessories (like the fuel pump and power steering pump), and contains the passages for oil and coolant.

This in-depth guide is an essential resource for professional engine technicians and parts managers. Nous déconstruirons l'ensemble Ensemble de boîtier avant FAW dans son 24 composants réparables, including bearing covers, la pompe à huile, oil cooler piping, and the vast array of seals and fasteners required for a leak-free engine.

Composant principal: The Front Housing (1701015-A2V)

Le coeur du Ensemble de boîtier avant FAW is the ‘Front housing with steel wire sleeve set assy’ (1701015-A2V). This is the main structural casting, typically made from high-grade aluminum to save weight. Ce n'est pas seulement un “couverture”; it is a load-bearing component that adds to the engine’s overall rigidity.

Its primary function is to create a sealed “cas” that encloses the engine’s entire timing gear train (as detailed in assembly 16). This case contains the high-velocity “éclabousser” of oil that lubricates the timing gears, preventing it from leaking and protecting the gears from road dust and water.

Le “steel wire sleeve set” (Par exemple, Hélicoil) designation is a critical quality feature. It means the aluminum casting has been pre-fitted with hardened steel thread inserts. This is vital for all the accessory mounting bolts, as it prevents the soft aluminum threads from stripping during service, assurer une sécurité, high-torque mount for the life of the Ensemble de boîtier avant FAW.

Shaft and Bearing Support System

Le Ensemble de boîtier avant FAW provides the mounting and sealing for several critical shafts that pass through it. The ‘Cover-first shaft rear bearing’ (1701141-A7G) et son 'Joint’ (1701142-A7G) are a key sub-assembly. C'est le principal “capuchon” that bolts to the *inside* of the front housing, securing the large input shaft bearing (voir montage 143) in its bore.

De la même manière, the ‘End cap-intermediate shaft front bearing’ (1701028-A9P) est le “capuchon” that seals and secures the front bearing of the transmission’s counter-shaft (voir montage 144). These bearing caps are not interchangeable and are precision-machined.

Le Ensemble de boîtier avant FAW also houses the ‘Bushing-shift fork shaft’ (1701013-A9P). This is a bronze bushing pressed into the housing, which supports the end of a shift rail from the “capot supérieur” assemblée (voir montage 153). These bearing supports are what ensure all the transmission’s internal shafts are held in perfect, parallel alignment.

Integrated Lubrication System Components

Le Ensemble de boîtier avant FAW is not just a case; it is an active part of the engine’s lubrication system. The ‘Oil pump assembly’ (1707840-A6V) is mounted *to* (or *in*) this housing, driven by a gear on the crankshaft. Cette assemblée est la “cœur” of the transmission’s own oil system, drawing fluid from the sump and force-feeding it to all the gears and bearings.

This system also includes the ‘Oil pipe assembly’ (1701435-A6V), ‘Oil spray pipe assembly’ (1701450-A2V), and ‘Intake oil pipe assembly’ (1701420-A2V). Ce sont les “artères” de la Ensemble de boîtier avant FAW. They are rigid pipes that route the pressurized oil from the pump to specific, critical locations, such as spraying a constant jet of oil onto the main gear-mesh points and into the bearings.

Le Ensemble de boîtier avant FAW also has service ports, such as the ‘Cover-outer observation hole’ (1601042-A2K) (the clutch inspection port) et son 'Joint’ (1601041-A2K), which are bolted to the front. These integrated oil-handling features make the Ensemble de boîtier avant FAW a highly complex and critical component.

Attaches, Bouchons, and Seals

Le Ensemble de boîtier avant FAW must be perfectly sealed. This is accomplished by a large number of specialized fasteners and seals.

**Attaches:** The entire assembly is secured with dozens of high-tensile ‘Hex flange bolts’ (Q1841030S, Q1840816, Q1841035S, Q1841050, Q18410110S, Q1841230). The flange head and “S” taper (ou “T” taper) designation indicate they are high-strength, fixations résistantes aux vibrations. « Boulons à tête hexagonale’ (CQ1500616, CQ1501512S) and ‘Stud bolts’ (CQ1211640) are used in specific, high-load areas.

**Bouchons & Scellés:** The ‘Hollow dowel screw’ (1701442-A2V) et « Boulon creux’ (1701440-A2V, 1701442-A2V) sont “banjo” boulons, used to connect the oil lines while allowing fluid to flow through them. They are sealed with ‘Gasket rings’ (1701415-A2V). The ‘Hydraulic pneumatic O-ring rubber seal’ (CQ7343236B) provides a critical seal for a high-pressure connection, likely for the oil pump or a sensor.

The ‘Hex nuts’ (CQ34008, CQ34116) et « Joints à ressort’ (Q40306, Q40405) are used to secure the stud bolts. This comprehensive hardware set is what ensures the Ensemble de boîtier avant FAW can contain high-pressure oil and withstand constant engine vibration.

FAW Front Housing Assembly Parts List

Le tableau suivant fournit l'intégralité, ventilation détaillée de tous 24 components identified in the ‘Front Housing Assembly’ schéma du tracteur FAW CA4251P66K24T1A3E5. Ce Ensemble de boîtier avant FAW is the structural and logical hub of the transmission.

Spécifications techniques et contexte d'assemblage

Les spécifications pour le Ensemble de boîtier avant FAW sont définis par sa fonction de structure, precision-machined “timing case” et “boîtier de cloche” de la transmission. L'ensemble Ensemble de boîtier avant FAW is a key structural component.