Rear Axle Drive Shaft: تفكيك 9 Critical Parts for Flawless Torque Delivery

هذا هو التفكيك الفني لل Rear Axle Drive Shaft, a vital drivetrain component for the FAW Jiefang CA3250P66K2L1T1E 6×4 تفريغ الشاحنة. هذا الدليل تفاصيل 9 serviceable parts that ensure reliable power transmission from the gearbox to the differential, which is essential for heavy-haul operations and off-road durability.

ال Rear Axle Drive Shaft is not a single part but a complex, high-speed, dynamically balanced assembly. Its primary function is to transmit the engine’s rotational power across a variable angle and distance from the gearbox to the rear axle differential. In a 6×4 dump truck like the CA3250P66K2L1T1E, this component endures immense stress, constant changes in angle due to suspension travel, and high-speed rotation. This breakdown focuses on the serviceable aspect, identifying the individual components that can be replaced during a standard rebuild or repair, which is essential for cost-effective fleet maintenance.

جوهر 1: ال “Articulation” منطق (The Universal Joint Assemblies)

The universal joint, or U-joint, is the heart of the Rear Axle Drive Shaft assembly’s ability to articulate. This assembly allows the shaft to spin smoothly even as the rear axle moves up and down with the suspension. This specific driveshaft uses two complete U-joint assemblies, one at each end. This articulation is managed by a group of four key components working in unison.

1. عنصر: ‘Cross and needle roller bearing assy’ (2201030-1050) – الكمية 2
هذا (شركات 5) is the central cross or spider. Each of its four arms, or trunnions, is a precision-ground journal designed to fit into a bearing cap. This assembly includes the four needle roller bearing caps that are pressed into the yokes. When this part fails, it typically results in significant driveline vibration or distinct audible noises during acceleration. Replacing it is a standard part of overhauling the Rear Axle Drive Shaft.

2. عنصر: ‘Flange yoke’ (2201023-80أ) – الكمية 2
هذا (شركات 2) is the yoke that physically bolts to the differential pinion flange and the transmission output flange. These yokes are secured by ‘Hexagon flange bolts’ (شركات 3, الكمية 8) and ‘Type I non-metallic insert hex lock nuts’ (شركات 1, الكمية 8).

هذا المنطق السحابي is a critical safety system. The non-metallic insert in the nut (شركات 1) provides prevailing torque. This prevents the fasteners from backing off under the constant, high-frequency vibration inherent in a heavy-duty drivetrain. Using standard nuts and bolts without this locking feature would lead to catastrophic failure of the Rear Axle Drive Shaft.

3. عنصر: ‘Circlip’ (2201041-80أ) – Select 8
هذا (شركات 4) is arguably the most critical component for U-joint longevity, functioning as a precision shim. These are the circlips, or snap rings, that lock the U-joint’s bearing caps (from Comp 5) into the yokes (شركات 2 and Comp 6).

The Bill of Materials (BOM) specifies ‘Select 8’ and lists multiple sub-part numbers (2201042-80أ, 2201043-80أ, إلخ.). هذا Selective Fit Logic أمر بالغ الأهمية. It means these circlips come in a range of precise thicknesses. A technician must assemble the joint and then select the correct thickness of circlip to achieve the precise, minimal end-play specified by the manufacturer. This selection process ensures there is no lateral movement, which would otherwise hammer the needle bearings to failure. This is a high-precision step in servicing the Rear Axle Drive Shaft.

جوهر 2: ال “Length & عزم الدوران” منطق (The Shaft Body Assembly)

This group of components forms the main body of the Rear Axle Drive Shaft. It is responsible for two functions: spanning the required distance between the transmission and the axle, and handling the dynamic length change required by the truck’s suspension.

1. عنصر: ‘Rear axle drive shaft weld yoke and spline sleeve assy’ (2201015-80أ) – الكمية 1
هذا (شركات 7) هو العنصر الهيكلي الأساسي. It consists of the main driveshaft tube, which is permanently welded to a yoke at one end (for one of the U-joints) and a spline sleeve (an internal spline) at the other.

هذا Welded Logic is a design choice for extreme strength and rigidity. The welds ensure the yokes and tube act as a single piece. This allows them to transfer immense torque without slipping, shearing, or breaking away from the tube under the extreme loads of a fully-loaded dump truck. This permanent bond is the backbone of the Rear Axle Drive Shaft.

2. عنصر: ‘Spline shaft yoke assy’ (2201020-80أ) – الكمية 1
هذا (شركات 6) is the ‘slip yoke’. It is a yoke (which holds the other U-joint) that is permanently attached to a matching external spline shaft. This external spline is designed to slide, or plunge, in and out of the spline sleeve (شركات 7).

هذا Plunge Logic is essential for any vehicle with a live-axle suspension. As the CA3250P66K2L1T1E’s rear axle articulates over bumps and terrain, the distance between the fixed transmission and the moving differential changes constantly. This slip-yoke assembly allows the Rear Axle Drive Shaft to lengthen and shorten dynamically, preventing the assembly from binding and destroying itself, the transmission bearings, or the differential pinion bearings.

3. عنصر: ‘Straight type grease nipple’ (CQ70001) – الكمية 1
هذا (شركات 8) is a small but functionally vital part. It is a standard zerk fitting that is threaded into the slip-yoke assembly (شركات 6) to allow for periodic lubrication. Technicians must pump chassis grease into this fitting as part of a regular maintenance schedule. This grease is the only thing protecting the male and female splines (شركات 6 and Comp 7) from fretting, تآكل, and grinding themselves into dust. A dry, unlubricated slip yoke is a common cause of Rear Axle Drive Shaft clunking and eventual failure.

جوهر 3: ال “High-Speed Stability” منطق (The Balancing System)

This final component group is dedicated to a single, critical purpose: high-speed rotational stability. A long, heavy rotating mass like this Rear Axle Drive Shaft will cause destructive, harmonic vibrations if it is not perfectly balanced, much like a vehicle’s tire and wheel assembly.

1. عنصر: ‘Balance plate’ (2201071-1ح) – Qty As Req.
هذا (شركات 9) is a small, precisely weighted metal plate. The BOM lists multiple variations (2201072-1ح, 2201073-1ح, إلخ.) and a quantity of ‘As Required’. This indicates the منطق التوازن.

After the entire Rear Axle Drive Shaft assembly is assembled, it is placed on a high-speed dynamic balancing machine. The machine spins the shaft at operational speed and electronic sensors detect any tiny imbalance or heavy spot along its length.

The technician then spot-welds these ‘Balance plates’ (شركات 9) of a specific weight onto the driveshaft tube (شركات 7) at specific locations to counteract the heavy spots. This process is essential for a smooth, vibration-free operation at highway speeds. An unbalanced Rear Axle Drive Shaft will quickly destroy U-joints, transmission seals, and pinion bearings.

Rear Axle Drive Shaft: Complete 9-Part Serviceable Breakdown

الجدول التالي يوفر كامل, تفصيل مفصل للجميع 9 serviceable component types in the Rear Axle Drive Shaft تجميع FAW Jiefang CA3250P66K2L1T1E 6×4 تفريغ الشاحنة. Note that components listed as ‘As Required’ or ‘Select’ are precision-fitting parts that must be chosen by the technician to meet build specifications.

المواصفات الأساسية

المواصفات لذلك Rear Axle Drive Shaft are defined by its role as a high-torque, high-angle driveline component for a heavy-duty dump truck application. Understanding these specifications is key to ordering the correct assembly.