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SINOTRUK HOWO Clutch Master Cylinder – OEM WG9925230840 | Reliable Hydraulic Control

PART NO.:
WG9925230840
Part Name:
Clutch Master Cylinder
Russian Name:
Главный цилиндр сцепления

The clutch master cylinder is a critical component in the hydraulic clutch actuation system, converting mechanical pedal force into hydraulic pressure to engage and disengage the clutch smoothly. For SINOTRUK HOWO heavy-duty trucks, the OEM number WG9925230840 identifies a precision-engineered clutch master cylinder designed to deliver consistent, responsive clutch operation under extreme working conditions. As a trusted supplier of Sinotruk howo parts, Deruna offers this genuine clutch master cylinder, manufactured to the strictest OEM specifications.

The WG9925230840 clutch master cylinder features a durable aluminium body, a precision-honed bore, and a high-quality piston seal that ensures leak-free performance and long service life. Its advanced design minimizes pedal effort, provides consistent hydraulic pressure, and delivers reliable clutch disengagement even under heavy loads. Whether you are overhauling the clutch system or replacing a worn cylinder, this component delivers the control and reliability that SINOTRUK HOWO trucks demand.

OEM direct replacement – no modifications needed  |  Engineered for SINOTRUK HOWO manual transmission systems

Clutch Master Cylinder

Clutch Master Cylinder

Главный цилиндр сцепления

Cilindro maestro de embrague

Clutch Master Cylinder

Clutch Master Cylinder

Главный цилиндр сцепления

Cilindro maestro de embrague

Clutch Master Cylinder

Clutch Master Cylinder

Главный цилиндр сцепления

Cilindro maestro de embrague

Product Overview – Clutch Master Cylinder WG9925230840

This clutch master cylinder is a precision-hydraulic component designed for SINOTRUK HOWO heavy-duty trucks. It converts the mechanical force from the clutch pedal into hydraulic pressure, which is transmitted to the clutch slave cylinder to disengage the clutch. The WG9925230840 cylinder is engineered to exacting OEM tolerances, ensuring a perfect fit and reliable performance in all operating conditions.

The cylinder body is manufactured from high-grade aluminium alloy, providing excellent corrosion resistance and lightweight strength. The bore is precision-honed to a mirror finish, ensuring smooth piston movement and minimal wear. The piston seal is made from a durable elastomer compound that resists brake fluid degradation, maintaining a leak-tight seal over the component’s service life. The cylinder is also equipped with a built-in reservoir and a push rod for easy integration with the pedal linkage.

Investing in the genuine WG9925230840 clutch master cylinder ensures that your truck maintains smooth, consistent clutch engagement, reduces pedal effort, and enhances driving comfort. It is the preferred choice for fleet operators and workshops that demand uncompromised quality and reliability from their clutch actuation components.

Technical Specifications – OEM WG9925230840 Clutch Master Cylinder

OEM Number WG9925230840
Part Name Clutch Master Cylinder
Brand SINOTRUK HOWO
Component Category Chassis / Clutch Actuation
Body Material High-grade aluminium alloy (A380)
Weight (approx.) 1.2 kg (2.6 lbs)
Bore Diameter 22.2 mm (7/8 inch)
Stroke Length 35 mm
Reservoir Capacity 50 mL
Maximum Hydraulic Pressure 80 bar (8 MPa)
Operating Temperature Range -40°C to +100°C
Seal Material EPDM (ethylene propylene diene monomer)
Port Thread M10 x 1.0 (outlet)
Application SINOTRUK HOWO A7, T7, 6×4, 8×4, and most heavy-duty models with manual transmissions

All values are based on OEM engineering specifications for the WG9925230840 clutch master cylinder. Minor deviations may occur due to manufacturing tolerances.

Key Features of the WG9925230840 Clutch Master Cylinder

Precision-Machined Aluminium Body

The WG9925230840 body is manufactured from high-grade aluminium alloy, providing excellent corrosion resistance, lightweight strength, and thermal stability.

Honed Bore for Smooth Operation

The cylinder bore is precision-honed to a mirror finish, ensuring low-friction piston movement and extended seal life.

High-Quality EPDM Seals

The seals are made from durable EPDM rubber, offering excellent resistance to brake fluid, temperature extremes, and aging.

Integrated Reservoir with Diaphragm

The built-in reservoir features a flexible diaphragm that compensates for fluid volume changes and prevents contamination.

Consistent Pressure Output

The precision-ground piston and seal geometry ensure consistent hydraulic pressure generation, resulting in smooth and predictable clutch engagement.

Extended Service Life

With its durable materials and precision construction, this master cylinder delivers long-lasting performance, reducing the frequency of clutch system repairs.

Why Choose the Genuine SINOTRUK HOWO WG9925230840 Clutch Master Cylinder?

The clutch master cylinder is a safety-critical component that directly affects clutch operation, drivability, and driver control. Using a counterfeit or substandard cylinder can lead to leaks, inconsistent pedal feel, premature clutch wear, and even clutch failure. The genuine WG9925230840 clutch master cylinder eliminates these risks through OEM-grade materials, precision manufacturing, and rigorous quality testing.

Key benefits of choosing the authentic WG9925230840:

  • Exact OEM fitment – The WG9925230840 matches the original in all critical dimensions – bore size, stroke, port location, and mounting points – ensuring a perfect fit with the pedal linkage and hydraulic line.
  • Superior sealing performance – The high-quality EPDM seals and precision-honed bore of the WG9925230840 ensure leak-free operation and consistent hydraulic pressure.
  • Consistent pedal feel – The precision piston and seal design provide a firm, responsive pedal feel, reducing driver fatigue and improving shift quality.
  • Reduced maintenance – The durability of the WG9925230840 minimises the need for frequent replacements, keeping your fleet operational and reducing downtime.
  • Warranty protection – Using genuine WG9925230840 parts helps maintain the vehicle’s warranty and ensures compliance with safety and quality standards.

Deruna sources the WG9925230840 clutch master cylinder directly from authorized manufacturers, subjecting each unit to a thorough quality inspection. We package each component securely to prevent damage during shipping, so it arrives ready for installation.

Installation & Maintenance Guide for the WG9925230840 Clutch Master Cylinder

Proper installation and regular maintenance are essential to maximize the service life and performance of the WG9925230840 clutch master cylinder. Follow these best practices:

Inspect the hydraulic system

Before installing the WG9925230840, inspect the clutch fluid lines and slave cylinder for wear or damage. Replace any worn components to ensure a complete, reliable system.

Use correct fluid

Fill the reservoir with the recommended DOT 3 or DOT 4 brake fluid. Never use mineral oil or other incompatible fluids.

Bleed the system

After installation, bleed the hydraulic system thoroughly to remove air and ensure a firm, responsive pedal feel.

Periodic inspection

Regularly check the cylinder for external leaks and inspect the fluid level and condition. Replace the fluid according to the manufacturer’s schedule.

Always refer to the SINOTRUK HOWO service manual for detailed procedures, torque values, and bleeding instructions. Regular maintenance of the WG9925230840 clutch master cylinder ensures reliable clutch operation and extends the life of the entire clutch system.

Vehicle Compatibility – SINOTRUK HOWO Models for WG9925230840

The WG9925230840 clutch master cylinder is compatible with a wide range of SINOTRUK HOWO heavy-duty trucks and commercial vehicles, including:

HOWO A7 HOWO T7 HOWO 6×4 HOWO 8×4 HOWO 4×2 HOWO Dump Trucks HOWO Concrete Mixers HOWO Tractor Units

For models not listed, cross-reference your original clutch master cylinder part number with WG9925230840. This component is designed to fit SINOTRUK HOWO manual transmission systems with standard clutch hydraulic configurations. Please consult your vehicle’s service manual or a qualified technician to confirm compatibility.

Conclusion – The WG9925230840 Clutch Master Cylinder: Precision and Durability

The WG9925230840 clutch master cylinder is a vital component of the SINOTRUK HOWO clutch actuation system, providing precise hydraulic control, consistent pedal feel, and reliable clutch disengagement in the most demanding heavy-duty applications. Its high-quality aluminium construction, precision-honed bore, and durable seals ensure that your truck delivers smooth gear changes and reduces driver fatigue, time after time.

By choosing the genuine WG9925230840 part, you protect your vehicle from the dangers of inferior aftermarket alternatives – leaks, inconsistent pedal feel, and premature failure. Instead, you invest in a component rigorously tested and validated by SINOTRUK HOWO, giving you peace of mind on every journey. Its superior materials, precision engineering, and corrosion resistance contribute to lower maintenance costs, reduced downtime, and enhanced driver comfort.

As a dedicated supplier of Sinotruk howo parts, Deruna is committed to delivering the WG9925230840 clutch master cylinder with the highest level of quality assurance. Every unit is inspected to meet OEM specifications, ensuring that you receive a product you can trust.

Equip your SINOTRUK HOWO with the genuine WG9925230840 clutch master cylinder – engineered for strength, precision, and uncompromising clutch control.

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