The part is a high-performance final drive assembly that transfers engine torque to the rear wheels of the Sitrak C7H. This comprehensive kit includes all necessary components – from the differential casing and gears to bearings, seals, and fasteners – for a complete overhaul or replacement of the rear axle drive system.
For complete technical specifications and ordering details, please refer to the official Sinotruk Catalog, which provides comprehensive information on all available variants and compatible truck models for The part.
The part is engineered to provide exceptional durability and efficiency, featuring precision-cut gears, robust bearings, and a rugged housing. Its advanced design ensures smooth operation, reduced noise, and long service life, making it an ideal choice for heavy-duty applications. This MCY Rear-Axle Drive Unit is the definitive solution for operators who demand reliable power transmission and minimal maintenance.
Whether you are rebuilding a worn axle or upgrading to a higher-capacity unit, this MCY Rear-Axle Drive Unit kit delivers factory-quality components and a straightforward installation. Every part is manufactured to the highest standards, ensuring that your Sitrak C7H continues to perform at its best.
The Nameplate is a durable identification tag that provides essential information about The part, including part numbers and specifications. It ensures traceability and aids in maintenance record-keeping.
This plug seals the oil filling or draining hole in the axle housing. In the MCY Rear-Axle Drive Unit, it provides a reliable seal against oil leakage and contamination, ensuring the drive unit remains properly lubricated.
This document provides the precise gear ratio and backlash settings for the bevel gear pair. In the MCY Rear-Axle Drive Unit, it serves as a critical reference for correct assembly and gear meshing adjustment, ensuring optimal power transfer and reduced noise.
This heavy-duty tapered roller bearing supports the differential assembly. In the MCY Rear-Axle Drive Unit, it provides high radial and axial load capacity, ensuring smooth and durable operation under extreme torque conditions.
This O-ring provides a static seal between the bearing housing and the axle casing. In the MCY Rear-Axle Drive Unit, it prevents lubricant leakage and keeps contaminants out, maintaining the integrity of the oil seal.
The Bearing Housing is a precision-machined component that supports the differential bearings. In the MCY Rear-Axle Drive Unit, it is made of high-strength cast iron and provides a rigid mounting point for the bearing assembly.
This tapered roller bearing supports the pinion shaft. In the MCY Rear-Axle Drive Unit, it is designed to handle high axial and radial loads, ensuring precise gear alignment and smooth rotation.
The Oil Seal Assembly prevents lubricant leakage at the axle shaft entry point. In the MCY Rear-Axle Drive Unit, it features a double-lip design with a spring-loaded sealing edge, providing excellent sealing performance even under high pressure and temperature.
The Flange Assembly connects the drive shaft to the pinion. In the MCY Rear-Axle Drive Unit, it is forged from high-strength steel and features a splined bore for positive torque transmission.
The Lock Nut secures the pinion bearing preload. In the MCY Rear-Axle Drive Unit, it is a precision-ground nut with a fine-pitch thread, allowing accurate adjustment of bearing tension.
This cylindrical roller bearing supports the differential side gears. In the MCY Rear-Axle Drive Unit, it provides high radial load capacity and allows axial movement, accommodating thermal expansion.
This retaining ring secures the bearing on the shaft. In the MCY Rear-Axle Drive Unit, it is made of spring steel and provides positive axial retention under all operating conditions.
This set of shims is used to adjust the preload and backlash of the main drive bearings. In the MCY Rear-Axle Drive Unit, they ensure correct gear meshing and optimal bearing life.
The Differential Case houses the differential gears and bearings. In the MCY Rear-Axle Drive Unit, it is a precision-machined casting that provides a robust housing for the internal components.
The Differential Cover seals the differential case and provides access for inspection. In the MCY Rear-Axle Drive Unit, it is made of stamped steel with a gasket flange for leak-free sealing.
This planet shaft supports the planetary gears. In the MCY Rear-Axle Drive Unit, it is hardened and ground to provide a durable pivot point for the gears.
This longer planet shaft is used for the opposite side of the differential. In the MCY Rear-Axle Drive Unit, it is identical in construction to the shorter shaft but with increased length to accommodate the assembly.
The Planetary Gears are the rotating elements of the differential. In the MCY Rear-Axle Drive Unit, they are precision-ground from alloy steel for quiet operation and high torque capacity.
The Side Gears transfer torque from the differential to the axle shafts. In the MCY Rear-Axle Drive Unit, they are made of case-hardened steel with precision-cut teeth for reliable power transmission.
This additional planet shaft supports the thrust washers. In the MCY Rear-Axle Drive Unit, it ensures proper axial positioning of the planetary gears.
These thrust washers prevent metal-to-metal contact between the gears and the case. In the MCY Rear-Axle Drive Unit, they are made of hardened steel with a wear-resistant coating.
These high-strength bolts secure the differential cover and bearing caps. In the MCY Rear-Axle Drive Unit, they are grade 12.9 with a fine-pitch thread, providing exceptional clamping force and vibration resistance.
This tapered roller bearing supports the differential side bearings. In the MCY Rear-Axle Drive Unit, it provides high load capacity and precise axial adjustment.
This is the main housing assembly that contains all differential components. In the MCY Rear-Axle Drive Unit, it includes an integrated differential lock mechanism, providing additional traction when needed.
These nuts are used to set the preload and backlash of the differential bearings. In the MCY Rear-Axle Drive Unit, they are precision-threaded for accurate adjustment.
These cotter pins secure the adjusting nuts after adjustment. In the MCY Rear-Axle Drive Unit, they prevent unintentional loosening, ensuring the settings remain stable over time.
This set of shims is used to adjust the position of the drive pinion. In the MCY Rear-Axle Drive Unit, they ensure correct gear contact pattern and quiet operation.
This set of housing components includes the main casting and associated parts. In the MCY Rear-Axle Drive Unit, they form the structural core of the differential assembly.
This high-performance sealant is applied to mating surfaces to prevent oil leaks. In the MCY Rear-Axle Drive Unit, it provides a durable, oil-resistant seal that withstands high temperatures and pressures.
This premium grease is used for lubricating bearings and gears during assembly. In the MCY Rear-Axle Drive Unit, it provides initial protection and ensures smooth operation until the oil circulates.
The MCY Rear-Axle Drive Unit is built with high-strength materials and precision-cut gears, capable of handling the highest torque outputs of the C7H engine. This ensures reliable power transmission and long service life, even under the most demanding operating conditions.
This MCY Rear-Axle Drive Unit kit includes every component needed for a full axle rebuild – from the differential case to all bearings, seals, gears, and fasteners. No additional parts are required, saving time and ensuring compatibility.
All gears and bearings in the MCY Rear-Axle Drive Unit are manufactured to exacting tolerances, ensuring correct meshing and minimal noise. The included shim sets allow precise adjustment of backlash and preload, resulting in smooth and quiet operation.
The MCY Rear-Axle Drive Unit is manufactured to the exact OEM specifications, guaranteeing a perfect fit on the Sitrak C7H. The use of premium materials and advanced manufacturing processes ensures that this drive unit will deliver reliable performance for millions of kilometers.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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