

The part is a critical pneumatic actuator that provides positive locking and release functions for the gearbox on the HOWO A7 8X4 heavy truck. This robust cylinder assembly ensures that the transmission remains securely locked in the selected gear range, preventing unintended disengagement under high torque loads. The part is engineered for rapid response and consistent force output, contributing to safe and reliable vehicle operation.
At howo Parts, we supply the genuine Transmission lock work cyclinder assembly that meets the strictest OEM standards. Our Transmission lock work cyclinder includes the Forked movable joint, Hexagonal thin nut, ES flat pin, and Spring store cylinder. Every component of The part is manufactured to precise tolerances, ensuring leak‑free pneumatic operation and long‑term reliability. The part is designed for the HOWO A7 8X4 transmission, offering consistent locking force and resistance to vibration.
Proper locking function is essential for transmission protection and driver safety. The part plays a central role in maintaining gear engagement and preventing accidental disengagement. Regular inspection and timely replacement of Transmission lock work cyclinder components will prevent air leaks, reduced locking force, and premature wear. Trust our Transmission lock work cyclinder to keep your HOWO A7 8X4 shifting securely for millions of kilometres.
The Forked movable joint is a pivoting connector that links the actuator rod to the shift fork. It accommodates angular misalignment and ensures smooth force transmission within The part. This joint is made from hardened steel for wear resistance and long life.
The Hexagonal thin nut is a low‑profile fastener used to secure the forked joint to the actuator rod. Its slim design allows for use in confined spaces within The part. The nut is zinc‑plated for corrosion protection and provides reliable clamping force.
The ES flat pin is a hardened cylindrical pin that provides a pivot point for the forked joint. It is precision‑ground to ensure smooth articulation and is secured with a retaining ring. This pin is a critical component of The part, enabling reliable movement under load.
The Spring store cylinder is the main actuating unit that stores mechanical energy and provides locking force. It incorporates a powerful spring and a pneumatic piston, delivering consistent holding force even when air pressure is lost. This cylinder is the core of The part, ensuring failsafe locking in the event of system failure.
| Part NO. | Description |
|---|---|
| 190003964418 | Forked movable joint |
| Q350B08T15 | Hexagonal thin nut |
| WG780 350055 | ES flat pin |
| WG780 350055/1 | ES flat pin |
| WG9000360514 | Spring store cylinder |
| WG9000360514/1 | Spring store cylinder |
Our Transmission lock work cyclinder incorporates a spring‑loaded mechanism that maintains locking force even in the event of air supply loss. This ensures that the transmission remains securely engaged, preventing unintended gear disengagement and enhancing safety.
Every element of The part, from the fork joint to the spring cylinder, is manufactured to exacting tolerances. This ensures smooth actuation, consistent locking pressure, and long‑term reliability.
We supply The part as a comprehensive assembly with all necessary pins, nuts, and cylinders. This simplifies ordering and ensures you have all parts for a complete replacement of The part.
We maintain a large inventory of Transmission lock work cyclinder assemblies and service parts to ensure fast delivery worldwide. Our technical experts provide installation guidance and troubleshooting support for The part.
The part is essential for maintaining gear engagement and preventing unwanted shifting. A compromised Transmission lock work cyclinder can lead to gear disengagement under load, resulting in driveline shock and potential component damage. Regular inspection and using genuine Transmission lock work cyclinder parts ensure that your HOWO A7 8X4 remains safe and reliable.
The part is designed to withstand extreme temperatures and corrosive environments. The spring store cylinder uses high‑grade spring steel and corrosion‑resistant coatings, while the ES flat pin and fork joint are hardened and plated to resist wear and rust.
When installing The part, torque the Hexagonal thin nut to the specified value. Ensure that the ES flat pin is fully inserted and secured with a retaining ring. Proper alignment of the fork joint is critical for smooth operation of The part.
We recommend inspecting The part every 50,000 km. Check for air leaks, corrosion, and spring fatigue. Test the locking force by applying air pressure and verifying full engagement. Replace any worn components immediately to maintain system integrity. Early replacement of Transmission lock work cyclinder elements prevents gearbox damage.
Our Transmission lock work cyclinder is specifically designed for the HOWO A7 8X4 transmission, matching the original equipment in fit and function. The part is compatible with all variants of the vehicle, ensuring a direct replacement without modifications.
Each Transmission lock work cyclinder component undergoes 100% inspection, including pressure testing, spring force verification, and dimensional checks. We offer a comprehensive warranty against defects, giving you full confidence in your Transmission lock work cyclinder purchase.
We maintain a large stock of Transmission lock work cyclinder assemblies and individual service parts to support fleet maintenance and urgent repairs. Bulk orders are available with competitive pricing and fast shipping. Contact our sales team for custom requirements for your Transmission lock work cyclinder.
Investing in a genuine Transmission lock work cyclinder reduces total ownership costs by preventing transmission failures, extending gear life, and improving driver confidence. The robust construction of The part ensures lower lifetime cost compared to inferior aftermarket alternatives.
Aftermarket lock cylinders often use inferior springs and seals, leading to premature failure and safety risks. Our Transmission lock work cyclinder is built to the same rigorous standards as the original equipment, ensuring consistent performance and safety. Trust The part from howo Parts for your HOWO A7 8X4.
The part provides positive and reliable locking for the transmission, preventing unintended gear disengagement during heavy pulls or descents. Its robust construction minimises maintenance requirements and ensures that the drivetrain remains secure. Regular maintenance of The part ensures safe and dependable vehicle operation.
Designed for diverse operating environments, The part delivers consistent locking force in extreme temperatures, high humidity, and dusty conditions. Its sealed construction protects internal components from contamination, ensuring reliable operation.
The part incorporates multiple safety features, including a spring‑loaded failsafe that maintains locking force even with loss of air pressure. The ES flat pin and fork joint are designed to withstand high shear loads, ensuring that the locking mechanism remains intact under extreme conditions.
Our Transmission lock work cyclinder uses advanced sealing technology with high‑quality O‑rings and precision‑machined bores to ensure leak‑free operation. The spring store cylinder is designed for rapid response, providing immediate locking action when air pressure is applied.
The spring store cylinder in The part is calibrated to deliver the optimal locking force for the HOWO A7 8X4 transmission, ensuring secure gear engagement without excessive stress on the shift mechanism. This balance of force and precision ensures long service life and reliable performance.
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.