Sinotruk Spare Parts: Gearbox Output Shaft Rear End Cover (AZ2222100023) for HOWO T7H

The Gearbox Output Shaft Rear End Cover (Part No. AZ2222100023) is a structural component designed exclusively for the Sinotruk HOWO T7H heavy-duty truck series. Positioned at the rear of the transmission housing, this cover plays a vital role in the HW series gearbox assembly (commonly HW19712 or HW25712 models).

As a critical item in our Sinotruk spare parts inventory, this cover serves two main functions: it provides axial support for the output shaft bearing and houses the oil seal to prevent transmission fluid leakage. A cracked or warped rear cover is a common cause of chronic oil leaks and driveshaft vibration. Our replacement part is cast to OEM specifications to ensure a perfect seal and proper bearing preload.

Technical Specifications

• Part Name: Gearbox Output Shaft Rear End Cover / Bearing Housing

• OEM Reference: AZ2222100023

• Product Category: Sinotruk Spare Parts > Transmission System

• Compatible Vehicle: Sinotruk HOWO T7H / Sitrak C7H

• Material: High-Strength Grey Cast Iron (HT250 equivalent) for thermal stability.

• Machining: CNC-machined mating surfaces for leak-free gasket sealing.

• Features: Includes pre-drilled bolt holes and oil seal recess.

• Weight: 3.5 kg 

Installation Note: When replacing the AZ2222100023 cover, we recommend also inspecting the output shaft oil seal and the paper gasket. Applying the correct sealant torque is crucial to prevent cracking the cast iron ear.