LUCAS 41701A Nos Lockheed Brake Master Cylinder Triumph Dual 47DE4 TR7 TR8 Circuit

( Brand: Lucas ), ( Manufacturer Part Number: 41701A ), ( Part Type: Circuit Brake Cylinder ), ( Size: One Size ), ( Unit Type: Unit )

Review LUCAS Nos Lockheed Brake Master Cylinder Triumph Tr7 Tr8 Dual Circuit

The **Lucas 41701A 47DE4 NOS Lockheed Brake Master Cylinder** is a meticulously preserved, no-service (NOS) hydraulic component designed exclusively for classic Triumph motorcycles, including the iconic **Triumph TR7 and TR8** models. This dual-circuit brake master cylinder is a direct replacement for the original Lockheed unit, ensuring seamless integration with the bike s braking system while maintaining the authenticity of its vintage engineering. Crafted from high-quality materials, the master cylinder features a robust, corrosion-resistant construction that guarantees durability and reliable performance over countless miles. The dual-circuit design enhances safety by providing redundant braking power, ensuring that even if one circuit fails, the other remains fully operational, a critical feature for riders who demand both precision and dependability. The NOS designation confirms that this part has never been opened, serviced, or altered, preserving its original factory condition with minimal wear, making it an ideal choice for restoration projects or enthusiasts seeking to maintain the integrity of their classic Triumph. Whether installed in a meticulously restored TR7 or a carefully maintained TR8, this master cylinder delivers the smooth, responsive braking action that these legendary machines are renowned for, blending vintage charm with modern reliability.

### **Pros and Cons of buying a Lucas 41701A 47DE4 NOS Lockheed Brake Master Cylinder (Triumph TR7/TR8, Dual Circuit)**

1. **Original Equipment Quality (OEM)**

The Lucas 41701A is a **New Old Stock (NOS)** part, meaning it was originally manufactured by Lockheed (a well-respected brake manufacturer) and has since been reconditioned or restored to like-new condition. This ensures reliability comparable to factory-spec components.

2. **Dual-Circuit Design**

The dual-circuit system means if one circuit fails, the other remains functional, improving safety. This is particularly important for vintage cars like the TR7/TR8, where brake reliability is critical.

3. **Direct Fitment for Triumph TR7/TR8**

This part is specifically designed for the **Triumph TR7 and TR8**, ensuring compatibility without modifications. It replaces the original Lockheed master cylinder, which was a common failure point in these models.

4. **High-Quality Materials & Build**

Lockheed master cylinders were known for their robust construction, using durable seals and a sturdy housing. The NOS version retains these qualities, often with better-than-average condition.

5. **Reliability & Longevity**

Many vintage car owners report that NOS brake components last significantly longer than aftermarket alternatives, reducing the need for frequent replacements.

6. **Aesthetic & Historical Value**

For enthusiasts, owning a NOS part adds authenticity to a restored or maintained Triumph. It aligns with the car s original specification, enhancing its value in the classic car market.

7. **Widely Available Support**

Since this is a well-documented part, mechanics and forums (e.g., Triumph TR clubs) have extensive knowledge about installation, bleeding, and troubleshooting.

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1. **Cost Compared to Aftermarket Alternatives**

NOS parts are **more expensive** than modern aftermarket master cylinders. While they offer superior quality, the price may be a barrier for budget-conscious buyers.

2. **Potential for Hidden Issues**

Even though it s NOS, the part may have **minor wear or internal corrosion** despite reconditioning. Some sellers do not disclose every detail, so thorough inspection is necessary.

3. **Limited Availability**

Unlike mass-produced aftermarket parts, NOS components can be **harder to find**, especially if the seller has a small inventory. Prices may fluctuate based on demand.

4. **Installation Complexity**

Replacing a master cylinder requires **bleeding the brake system**, which can be time-consuming if not done correctly. Improper bleeding may lead to spongy brakes or air leaks.

5. **Age-Related Wear**

Even if the part is NOS, the **seals and internal components** may still degrade over time, especially if the car is driven frequently. Regular maintenance is required.

6. **Potential for Counterfeit NOS Parts**

Some sellers may mislabel **used or reconditioned** parts as NOS. Buyers must verify the part s authenticity through documentation or trusted sources.

7. **Not Always the Latest Technology**

Since this is an older design, it lacks modern advancements like **self-adjusting mechanisms or improved corrosion resistance** found in contemporary master cylinders.

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The **Lucas 41701A NOS Lockheed Brake Master Cylinder** is an **excellent choice** for Triumph TR7/TR8 owners who prioritize **reliability, authenticity, and long-term performance**. Its dual-circuit design enhances safety, and its OEM quality ensures compatibility and durability. However, the **higher cost and potential for hidden issues** mean it may not be the best option for those on a tight budget or seeking the latest technology.

For **restoration projects or high-mileage daily drivers**, the NOS part is a **strong recommendation** due to its proven track record. For **casual drivers or those looking for cost-effective solutions**, an **aftermarket master cylinder** (from reputable brands like ATE, Brembo, or Wileux) may be a more practical alternative, though with slightly reduced historical accuracy.

If you value **originality, safety, and long-term reliability**, purchasing the **Lucas 41701A NOS Lockheed master cylinder** is a **wise investment**. Ensure you buy from a **trusted seller** with proper documentation and inspect the part thoroughly before installation. If budget is a concern, weigh the pros and cons carefully aftermarket options can be a viable alternative if you re not overly concerned about NOS authenticity.

Details:

Condition: Used acceptable with visible surface oxidation, grease, and wear from age previous use. Original Lucas 47DE4 Distributor and Ignition Tune-up Kit for late model Ferguson Tractors. Perfect for parts or as a restoration project classic agricultural machinery. Made in England.

This vintage assembly includes the main distributor housing marked Lucas England Patented 41701A, cap, rotor, and internal components. Sold as-is as a collection of parts.

part #: 41701a prices

• $185.58-$200.00

specifications hydraulicylind:

• brand: Lucas
• mpn: 41701a
• part type: Circuit Brake Cylinder
• size: One Size
• unit type: Unit

shipping hydraulicylind:

• service: USPS Ground Advantage
• type: Calculated
• class: Standard
• cost: $9.06
• carrier: USPS
• transit: 5-12 Days

offer hydraulicylind:

• started: June 11, 2026
• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home

returns hydraulicylind:

• policy: No Returns

general hydraulicylind:

• Business Industrial > Hydraulics, Pneumatics, Pumps Plumbing > Hydraulic Pneumatic Cylinders
• condition: Used

seller hydraulicylind:

• rating: 88.8%
• # reviews: 78
• city: Schaumburg, Illinois

payments hydraulicylind:

• credit card: Diners-club
• wallet: Apple-pay
• other