Genuine SINOTRUK HOWO Gear Selector Top Cover Housing (AZ2222210038) is engineered to maintain the structural integrity and precision required for the demanding shift cycles of heavy-duty trucks. As a vital piece of sinotruk spare parts, this housing is designed for the 10-speed double-rod HW series gearboxes, providing the stable platform for the shift rods, selector forks, and the critical interlock mechanism.

Technical Specifications

The AZ2222210038 is a precision-engineered component for the HW series gearbox shift mechanism.

Specification	Value
Part Number	AZ2222210038
Alternative Names	Transmission Small Cover, Gearbox Control Housing
Product Name	Gear Selector Top Cover Housing
Compatible Transmissions	HW19710, HW19712 (10-speed Double-Rod HW Series)
Compatible Vehicles	SINOTRUK HOWO, HOWO A7, SITRAK
Brand	SINOTRUK (Original OEM Specification)
Material	High-Strength Cast Aluminum Alloy
Configuration	Designed for Double Shift Rod Linkage
Function	Supports Shift Rods and Interlock Mechanism
Condition	Brand New

Installation Notes

Replacing the gear selector top cover housing requires careful alignment to ensure proper gear engagement.

1.Safety and Preparation: Ensure the vehicle is safely supported and the transmission is in Neutral. Clean the top of the gearbox thoroughly to prevent dirt from falling into the transmission when the cover is removed.

2.Removal: Disconnect the external shift linkage and any air lines. Remove the mounting bolts. Carefully lift the old AZ2222210038 housing, noting the position of the internal shift forks. Clean the mating surface of the gearbox housing.

3.Alignment: CRITICAL STEP. Ensure the internal shift rods/forks in the new housing are in the Neutral position. Carefully lower the housing onto the gearbox, ensuring the internal selector forks engage correctly with the synchronizer sleeves.

4.Sealing and Bolting: Apply a thin, even bead of high-temperature RTV silicone sealant or use a new genuine gasket. Install the mounting bolts and tighten them in a star pattern to the specified torque.

5.Linkage Adjustment: Reconnect the external shift linkage and air lines. Check the gear shift lever in the cab for proper travel and smooth engagement in all gears. Fine-tune the linkage adjustment as necessary.