Features & Benefits
- 1 & 1/2 Inch bore
- For use with DOT 3 brake fluid only
- Casting FD2704 repair kit part WAG-F3622
- Weighs 8lbs and measures H-4, L-10, W-8 box checked 12/2018
- Ideal for ensuring the safety of your vehicle
- Guaranteed top-notch quality
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Wagner Master Cylinder Part F661 1 & 12 Inch Bore Single Piece Piston Check Valve for use with DOT 3 Brake Fluid Only Casting FD2704 Repair Kit is
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Wagner Master Cylinder Part F661 ensures safety with single piece piston check valve
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What Stands Out
High Compatibility
Designed specifically for DOT 3 brake fluid, ensuring optimal performance and safety for your brake system without compatibility issues.
Durable Construction
Crafted from robust materials, the F661 cylinder provides long-lasting reliability and withstands demanding automotive environments.
Easy Installation
Single-piece piston design simplifies installation and maintenance, saving time and reducing the chances of assembly errors for DIY enthusiasts.
Product Details
- Wagner Master Cylinder Part F661
- 1 & 1/2 Inch Bore Single Piece Piston Check Valve
- For use with DOT 3 Brake Fluid Only
- Casting FD2704 Repair Kit is Part WAG-F3622
- Weighs 8 lbs
- Box size: H 4, L 10, W 8
- Box checked in December 2018
| Product Dimensions | 10 x 8 x 4 inches (25.4 x 20.3 x 10.2 cm); 8 Pounds (3.63 kg) |
| Date First Available | December 18, 2018 |
| Manufacturer | Wagner |
Who Should Buy?
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DIY Mechanics
Ideal for DIY enthusiasts repairing or replacing brake systems using DOT 3 brake fluid efficiently.
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Automotive Technicians
Professional mechanics will benefit from its reliability and compatibility with standard brake fluid requirements.
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Vintage Vehicle Owners
Owners of classic cars requiring specific parts will find this high-quality master cylinder suitable for their needs.
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High-Performance Vehicles
Not suitable for race cars or high-performance applications that require specialized brake fluids or components.
Product Description
Wagner Master Cylinder Part F661 1 & 12 Inch Bore Single Piece Piston Check Valve for use with DOT 3 Brake Fluid Only Casting FD2704 Repair Kit is Part WAG-F3622: F661
Have any Query? Chat with us
Customer Questions & Answers
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Question:
What is the Wagner Master Cylinder Part F661 designed for?
Answer: The Wagner Master Cylinder Part F661 is engineered for hydraulic brake systems, particularly those using DOT 3 brake fluid. This component plays a crucial role in the brake system by providing the necessary pressure to activate the brakes efficiently. It is suitable for a variety of automotive applications, making it an essential part for vehicle safety and performance. -
Question:
How does the single piece piston check valve function?
Answer: The single piece piston check valve in the Wagner F661 works by ensuring that brake fluid flows in one direction, maintaining pressure within the system. This mechanism prevents backflow, which is vital for consistent brake performance. When the brake pedal is pressed, the piston moves, allowing fluid to flow towards the brake calipers, enhancing the braking action. -
Question:
Why is it important to use DOT 3 brake fluid with this part?
Answer: Using DOT 3 brake fluid with the Wagner Master Cylinder F661 is essential as it is specifically formulated to work with the materials and design of the cylinder. DOT 3 brake fluid has a lower boiling point and is made to absorb moisture, preventing corrosion within the brake system. Always follow manufacturer guidelines to ensure optimal performance and safety. -
Question:
Can the Wagner Master Cylinder F661 be installed in different vehicle makes?
Answer: Yes, the Wagner Master Cylinder F661 is versatile and can be installed in various vehicle makes and models that require a system compatible with its specifications. However, it is important to consult the vehicle’s manual for compatibility, as each vehicle may have specific requirements for brake components to ensure efficiency and safety. -
Question:
What should I check before installing the Wagner Master Cylinder?
Answer: Before installation, ensure that the vehicle's brake lines, fluid reservoir, and fittings are clean and free of contaminants. Inspect the old master cylinder for any wear or damage, as remnants can affect the performance of the new part. A thorough cleaning will aid in smooth installation and enhance function after the replacement. -
Question:
Is professional installation recommended for the Wagner Master Cylinder F661?
Answer: While skilled DIYers may successfully install the Wagner Master Cylinder F661, professional installation is recommended for those unfamiliar with brake systems. Professionals can ensure proper fitment, check for any underlying issues, and perform a comprehensive brake system inspection. This expertise can enhance safety and performance during operation. -
Question:
What are the signs that the master cylinder needs replacement?
Answer: Some signs indicating a failing master cylinder include a spongy brake pedal, brake fluid leaks, or the brake warning light appearing on the dashboard. If the brake response feels inconsistent or requires more pressure to engage, it’s vital to investigate further and consider replacing the master cylinder to maintain vehicle safety. -
Question:
Can the Wagner F661 be used in racing or high-performance applications?
Answer: The Wagner Master Cylinder F661 is designed primarily for standard vehicle applications and may not perform optimally under extreme conditions like racing or high-performance driving. For such applications, consider specialized brake components designed to handle the increased demands of performance driving, ensuring both efficiency and safety. -
Question:
What is included in the casting FD2704 repair kit?
Answer: The casting FD2704 repair kit typically includes various seals, gaskets, and possibly a new piston designed to restore the functionality of the master cylinder. These components are vital for a reliable seal and optimal performance after any wear over time. Reviewing the kit contents before purchase ensures all necessary parts are included for an effective repair. -
Question:
Where can I buy the Wagner Master Cylinder Part F661 in Isle of Man?
Answer: You can purchase the Wagner Master Cylinder Part F661 from Ubuy in Isle of Man. Ubuy offers a seamless shopping experience, ensuring you have access to this essential part for your vehicle's braking system. Their platform provides a variety of options and easy navigation to help you find the exact component you need.
Wagner Parts Accessories Editorial Review
The Wagner Master Cylinder Part F661 is a must-have for those looking for a reliable replacement for their old and worn-out master cylinder. This single-piece piston check valve is compatible with DOT 3 brake fluid, making it a versatile option for various types of machinery. It's an OEM replacement, making it easy to install on your machines, such as water well pulling machines, front-end loaders, and more. The part has received positive feedback from customers who have already tried and tested it on their machinery. One user shared that the F661 fit perfectly on their 1989 International 4700, while another said it worked well on their old W18 wheeled front-end loader, and it was worth the price compared to rebuilding. If you're in need of a reliable and efficient master cylinder replacement part, the Wagner Master Cylinder Part F661 is an excellent choice. Buy one today and enjoy a smoother and more robust braking performance!
Customer Reviews & Ratings
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Pros
- Compatible with DOT 3 brake fluid
- Single-piece piston check valve
- Easy to install as an OEM replacement
- Received positive feedback from customers who tried and tested the product
Platform Trust & Buyer Confidence
MT
Mohd
Verified buyer
“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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Shawati
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“Accurate delivery timing given”
16 June 2026 · via Trustpilot
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Youcef
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“Not madly expensive like I thought, and much quicker than promised.”
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“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”
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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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