With over 20 years of experience in exporting brake system components, we specialize in the development and production of high-quality brake master cylinders. Our products are widely used in markets across Europe, the Middle East, Africa, and South America. We support OEM and ODM services, and possess full-process manufacturing capabilities from raw material casting to final assembly.

Search products (by OE Number)

We provide a wide range of master cylinder products categorized by OE numbers and compatible brands for easy reference and selection.

Brake Master Cylinder products

Picture	Product	OEM	Description	DIA	FSD	SPS
	Brake Master Cylinder MB57892/8HF8-127273	MB57892 8HF8-127273	MITSTUBISHI
	Brake Master Cylinder		MITSTUBISHI
	Brake Master Cylinder GND 10/FXFR2560	GND 10 FXFR2560
	Brake Master Cylinder 4237416/4797844	4237416 4797844	IVECO FIAT LANCIA
	Brake Master Cylinder 4237418/4726277/4765079	4237418 4726277 4765079	IVECO/FIAT LANCIA
	Brake Master Cylinder 4237415/F026003160/4254480/4723798/4765078/4783798	4237415 F026003160 4254480 4723798 4765078 4783798	FIAT IVECO (MK75-9A)
	Brake Master Cylinder 4732110/4164296/2997342/4754206/4762814/4324597	4732110 4164296 2997342 4754206 4762814 4324597	IVECO
	Brake Master Cylinder H28920.2.1/99463713/98434065	H28920.2.1 99463713 98434065	IVECO (59-12V/59-12K)
	Brake Master Cylinder H28926.7.1/500395653/504042985/504089711	H28926.7.1 500395653 504042985 504089711	IVECO (40C 14/17DK)
	Brake Master Cylinder H25934.0.1/42530542/02991743/2991743	H25934.0.1 42530542 02991743 2991743	IVECO (Estate35-10)
	Brake Master Cylinder 9989017/4839489/4844302	9989017 4839489 4844302	IVECO
	Brake Master Cylinder 02041237323/42556838	02041237323 42556838	IVECO

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Full range of brake and clutch parts, Especially for Trucks and Cars

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What is a Brake Master Cylinder?

The brake master cylinder is one of the core components of a hydraulic brake system. It transforms the mechanical force applied by the driver on the brake pedal into hydraulic pressure, which is then transmitted through brake lines to wheel cylinders or calipers to achieve braking.

Structure of the Brake Master Cylinder

Part Name (English)	Function Description (English)
Reservoir Cap	Prevents contamination of brake fluid by sealing the reservoir.
Diaphragm	Allows air pressure changes while maintaining fluid seal.
Stop Screw	Limits piston travel to prevent over-extension.
Spring	Returns the piston to its resting position after braking.
Seal Retaining Ring	Holds sealing rings securely for hydraulic integrity.
Front Cup Seal	Seals front chamber to prevent fluid leakage.
Washer	Distributes pressure and prevents component loosening.
Front Piston	Converts mechanical force into hydraulic pressure.
Rear Cup Seal	Seals rear chamber to prevent back leakage.
Rear Piston	Controls secondary hydraulic circuit in dual-chamber designs.
Push Rod Seat	Connects push rod to piston for force transmission.
Washer	Provides sealing or damping to reduce wear.
Snap Ring / Retaining Ring	Secures pistons and internal parts in position.
Dust Boot	Protects the piston from dust and moisture ingress.
Push Rod	Transfers pedal force to the piston for brake actuation.

👉If you want to know more about Brake Master Cylinder, please check out our article: What Is a Brake Master Cylinder? (Comprehensive Guide)

Key Component Spotlight: Piston Cup Seal

The piston cup seal is one of the most crucial sealing components inside the brake master cylinder. Its performance directly impacts the system’s sealing integrity, responsiveness, and lifespan.

We use premium original seals from Switzerland’s Datwyler, offering:

High-resistance materials: heat-resistant, oil-resistant, and aging-resistant

Precision-molded for perfect fit with piston and cylinder bore

Over 400,000 simulated brake cycles—far exceeding industry standards

Double sealing tests: air-tightness and vacuum performance

Brake Master Cylinder Working Principle

Non-Braking Condition

The pistons do not block the bypass ports; brake fluid flows freely between the reservoir and the cylinder. The system remains at atmospheric pressure.

Normal Braking Condition

When the brake pedal is pressed, the push rod moves the rear piston leftward. The sealing cup covers the bypass port, hydraulic pressure builds in the rear chamber, pushing the front piston. Both chambers generate pressure and deliver fluid to the wheel cylinders.

Brake Release Condition

When the pedal is released, the return spring pushes the pistons back. Brake fluid returns from the lines into the master cylinder. If piston return is too fast and creates vacuum, fluid is replenished from the reservoir via the compensation port.

About Us

We specialize in the R&D and manufacturing of hydraulic brake and clutch components, supplying OEM and aftermarket customers in over 80 countries. Our fully in-house production—from casting and CNC machining to assembly and testing—ensures stable quality backed by ISO/TS16949 certification.

Years of Production experience

9600

Factory area(m²)

3000+

Product category

2,000,000+

Annual Production

Learn more

Our Product Advantages

Material

High-purity ZL111 aluminum alloy with excellent pressure resistance and corrosion resistance; treated with T6 heat treatment and sandblasting for enhanced surface durability.

Sealing System

Equipped with premium Datwyler seals from Switzerland, ensuring outstanding airtightness and long-term stability under high temperature and pressure.

Machining Process

Utilizes 4-axis CNC machining and deep-hole drilling, with secondary precision machining at critical points to ensure superior concentricity and sealing performance.

Quality Inspection

Each unit undergoes dimensional checks, visual inspection, airtight and vacuum tests, and simulated life-cycle testing in compliance with international standards.

Compatibility

Compatible with major vehicle brands including Toyota, Volkswagen, GM, and Hyundai—ideal for global aftermarket applications.

Customization Capability

Supports OEM, drawing-based development, and private-label customization to meet diverse client requirements.

Manufacturing Capabilities

We operate complete casting, machining, assembly, and testing lines, fully staffed by experienced technicians and automated systems to ensure stable quality and output.

8 aluminum gravity casting lines

28 CNC machining lines with 4-axis centers & deep-hole drills

8 master cylinder assembly lines + 4 booster assembly lines

In-house labs for air tightness, vacuum, fatigue, and endurance testing

Mold development team: from concept to delivery

Download Center

Product Catalog (by OE)

Material Certifications

Performance & Test Reports

Illustrated Installation Guide

Visual Inspection by Trained Staff

Dimensional and Concentricity Checks

Air-Tightness Pressure Tests

Vacuum Sealing Tests

Endurance Tests (Optional)

Final Sampling and Traceability Coding

Quality Control & Certifications

Each unit undergoes the following quality control tests before shipment:

Visual Inspection by Trained Staff

Dimensional and Concentricity Checks

Air-Tightness Pressure Tests

Vacuum Sealing Tests

Endurance Tests (Optional)

Final Sampling and Traceability Coding

Frequently Asked Questions

How can I tell if the master cylinder is failing?

Spongy pedal, longer braking distance, brake warning light, fluid leakage

Does it require regular replacement?

Not usually, but replace if sealing fails or symptoms occur

Can I customize non-standard models?

Yes, we support drawing-based and branded customization

Get a Quote or Sample

Free samples & engineering support available Open to global distributor & brand partnerships

Leave A Message

Products

Brake Master Cylinder Clutch Master Cylinder Clutch Slave Cylinder Brake Wheel Cylinder Brake Proportioning Valve Cylinder Accessories

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Products By Brand OEM Services About us Resource

Email: cth4921687671996@gmail.com

Phone: 0086-15957686676

Factory Add: No. 333, Chengzhong Road, Yuhuan City, Taizhou City, Zhejiang Province, China

+86 15957686676

cth4921687671996@gmail.com

+86 15957686676

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