Genuine SINOTRUK HOWO T7H Gearbox Output Shaft Rear End Cover (AZ2222100023) is a critical structural and sealing component that ensures the integrity of the entire gearbox. As a vital piece of sinotruk spare parts, this cover is specifically designed for the HW series transmissions used in the high-performance HOWO T7H and SITRAK C7H trucks. Its primary function is to provide a precise, stable housing for the output shaft oil seal, preventing the catastrophic loss of gear oil that can lead to range gear failure.

Technical Specifications

The AZ2222100023 is a precision-engineered component for the HW series gearbox.

Specification	Value
Part Number	AZ2222100023
Alternative Names	Output Shaft Rear Housing, Gearbox Rear Cover
Product Name	Output Shaft Rear End Cover
Compatible Transmissions	HW Series (e.g., HW19710, HW25712)
Compatible Vehicles	SINOTRUK HOWO T7H, HOWO A7, SITRAK C7H
Brand	SINOTRUK (Original OEM Specification)
Material	High-Strength Cast Alloy
Seal Configuration	Designed for Double Oil Seal
Function	Seals Output Shaft Exit and Protects Range Gear
Condition	Brand New

Installation Notes

Replacing the output shaft rear end cover requires attention to detail, particularly concerning sealing surfaces and torque specifications.

1.Safety and Preparation: Ensure the vehicle is safely supported and the driveshaft is disconnected. Drain the gearbox oil to a level below the output shaft. Clean the mating surface on the gearbox housing thoroughly.

2.Seal Installation: Press the new output shaft oil seals (often a double seal) into the new AZ2222100023 cover using a proper seal driver. Ensure the seal lips are lubricated and facing the correct direction (spring side towards the oil).

3.Surface Sealing: Apply a thin, even bead of high-temperature RTV silicone sealant or use a new gasket on the cover’s mating surface. The surface must be perfectly clean and oil-free.

4.Mounting: Carefully slide the cover over the output shaft, taking care not to damage the new seals. Install the mounting bolts.

5.Torque Sequence: Tighten the bolts in a star pattern to the manufacturer’s specified torque (typically 25-35 Nm for M8 bolts in aluminum housing). Uneven tightening will warp the cover and cause leaks.

6.Post-Installation Check: Reinstall the output shaft flange and tighten the retaining nut to the high torque specification (consult the service manual). Refill the gearbox with the correct oil. Start the engine and inspect for leaks.