FAW First Shaft Assembly And Input Gear: انهيار شامل ل 11 المكونات الأساسية

مرحبًا بك في هذا الدليل الفني الشامل حول FAW First Shaft Assembly And Input Gear, the complete “input” group for the manual transmission in the FAW Jiefang CA4251P66K24T1A3E5 6×4 جرار نصف مقطورة ديزل. This assembly is the critical link between the engine’s clutch and the transmission’s gearset.

ال FAW First Shaft Assembly And Input Gear (also known as the input shaft) is responsible for receiving 100% of the engine’s torque from the clutch disc. It holds the main ‘Input Gear’ (1701121-A0L) أيّ, بدوره, drives the transmission’s counter-shaft, setting the entire gear-driven system in motion.

This in-depth guide is an essential resource for professional transmission technicians and parts specialists. سنقوم بتفكيك الكل FAW First Shaft Assembly And Input Gear, breaking it down into its 11 مكونات صالحة للخدمة, including the main shaft, the input gear, the critical support bearings, and all the circlips and seals that ensure its precise alignment and leak-free operation.

Core Shaft & Gear: ال “Input” of the Transmission

ال FAW First Shaft Assembly And Input Gear is composed of two primary, named components:

**1. First Shaft – الانتقال (1701112-A7G):** هذا هو “First Shaft,” more commonly known as the transmission input shaft. It is a high-strength, hardened steel shaft. الجبهة “أنف” of this shaft is splined and extends into the clutch housing, where it engages with the splined hub of the clutch disc. This spline is what allows the FAW First Shaft Assembly And Input Gear to be connected (and disconnected) from the engine’s flywheel.

**2. Input Gear – First Shaft (1701121-A0L):** هذا هو “Input Gear.” This large, helically-cut gear is permanently fixed (either splined or press-fit) onto the ‘First Shaft’. Its function is to transfer 100% of the engine’s torque from the shaft to the transmission’s counter-shaft, which is in constant mesh with this gear. The helical cut of the teeth is a critical design feature, ensuring quiet operation and maximum surface area contact for high-torque transfer. A chipped or worn tooth on this gear is a catastrophic failure for the FAW First Shaft Assembly And Input Gear and the entire transmission.

The Main Bearing System (6212-ZNBR/C3YB2)

كامل FAW First Shaft Assembly And Input Gear must be supported as it spins under immense loads. This is the job of the ‘Deep groove ball bearing with stop ring’ (6212-ZNBR/C3YB2). This is the main bearing for the input shaft.

This large, heavy-duty ball bearing (أ “6212” مسلسل) is pressed onto the ‘First Shaft’ (1701112-A7G). Its outer race is then secured in a precision-bored hole in the ‘Front housing’ (bell housing) of the transmission case. This bearing must handle both the “radial” حمولة (the sideways force from the gears pushing against each other) و “axial” حمولة (the push/pull force from the clutch being engaged and disengaged).

ال “stop ring” (or snap ring) on the bearing’s outer race is a critical feature. This ring fits into a groove in the transmission housing, locking the bearing (and thus the entire FAW First Shaft Assembly And Input Gear) in its precise fore-and-aft position. This is a vital function for maintaining the perfect gear mesh inside the transmission.

Precision Alignment: circlip & Gasket System

ال FAW First Shaft Assembly And Input Gear requires incredibly precise “end-play” (the amount of in-and-out movement). This is controlled by a complex set of “selective fit” circlips and a gasket.

The parts list calls out four separate ‘Circlip – أول محمل خلفي رمح’ items (1701131-A7G, 1701132-A7G, 1701133-A7G, and 1701134-A7G), as well as a ‘Gasket – أول محمل خلفي رمح’ (1701123-A7G). This indicates that these parts are not identical.

هذا هو “selective fit” أو “shimming” نظام. The different part numbers for the circlips correspond to different, precise thicknesses. During assembly, a technician must measure the shaft’s end-play with a dial indicator. They will then consult a chart and select the correct-thickness circlip and/or gasket from this set. This process “sets the preload” on the main bearing. Using the wrong circlip will cause the FAW First Shaft Assembly And Input Gear to be too “tight” (leading to bearing failure) or too “loose” (leading to gear whine and misalignment).

A separate ‘Circlip – العتاد العكسي’ (1701314-A7G) is also listed. This is a standard snap ring used to hold the reverse idler gear in its proper place on its own shaft, which is also part of the FAW First Shaft Assembly And Input Gear‘s overall function.

Ancillary Seals and Bushings

ال FAW First Shaft Assembly And Input Gear is completed by two critical, but small, عناصر: the ‘Bushing’ (1701111-A7G) and the ‘Oil seal – first shaft’ (1701135-A7G).

**1. The ‘Oil seal’ (1701135-A7G):** هذا هو الشيء الرئيسي “input shaft seal.” It is a radial lip seal that is pressed into the front of the transmission housing. Its flexible rubber lip rides on a polished surface of the first shaft. Its only job is to keep the transmission’s gear oil *inside* the transmission. A failure of this seal is a critical failure of the FAW First Shaft Assembly And Input Gear نظام, as it allows gear oil to leak into the dry clutch housing, saturating the clutch disc and causing it to slip and fail.

**2. The ‘Bushing’ (1701111-A7G):** هذا هو “pilot bushing” for the main shaft. The rear of the ‘First Shaft’ (input shaft) is hollowed out. ال “أنف” أو “tip” of the transmission’s *main* shaft (the one with all the sliding gears) fits *inside* this hollowed-out section. This bushing, made of bronze or a similar low-friction material, is pressed into this hole. It provides the front support for the entire main shaft. A worn bushing here will cause the main shaft to “wobble,” leading to gear grinding, اهتزاز, and shifting problems. It is a critical, often-overlooked part of the FAW First Shaft Assembly And Input Gear.

FAW First Shaft Assembly And Input Gear Parts List

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 11 components identified in the ‘First Shaft Assembly and Input Gear’ رسم تخطيطي للجرار FAW CA4251P66K24T1A3E5. A rebuild of the FAW First Shaft Assembly And Input Gear requires careful selection of the correct circlips.

المواصفات الفنية وسياق التجميع

المواصفات ل FAW First Shaft Assembly And Input Gear are defined by its function as the primary torque input for the transmission. هذا FAW First Shaft Assembly And Input Gear is a precision-balanced, high-strength assembly.