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2cv MASTER CYLINDER

The 2CV Méhari Club Cassis offers a complete range of master cylinders for all model years of your 2CV, as well as all peripheral parts for the master cylinder, such as brake fluid reservoirs, seals, mounting bolts and 2CV master cylinder controls. You will also find different types of brake fluid, Lockheed Dot 4 fluid for 2CVs equipped with drum brakes and LHM fluid for those equipped with front disc brakes.

2CV brake master cylinder: principle and operation

The master cylinder plays a key role in transmitting the hydraulic pressure needed to operate a vehicle's brakes. When the driver presses the brake pedal, it applies force to the piston of the 2CV master cylinder, to which it is directly connected. This force compresses the brake fluid inside the cylinder, creating hydraulic pressure. This pressure is then transmitted by the brake fluid to the vehicle's front and rear brake systems. The master cylinder therefore converts the mechanical pressure of the pedal into hydraulic pressure in the brake circuit, enabling the friction components (drums or discs) to be activated. Some master cylinder models are equipped with a single piston and are called ‘single-circuit master cylinders’, while others have two pistons (dual-circuit master cylinders). The presence of two pistons ensures better distribution between front and rear braking thanks to greater hydraulic pressure at the front of the vehicle. It also provides added safety: if one piston malfunctions, there is still a second piston to ensure braking action.

The 2CV master cylinder: several models for different generations of 2CVs

Like the braking system, the master cylinder of the 2CV has evolved significantly throughout the history of the famous Citroën. The models differ mainly in the following ways:
- The mounting point: originally mounted on the chassis until 1967, the 2CV brake master cylinder was then mounted directly on the body of the vehicle.
- The number of circuits: after single-circuit 2CV master cylinders until 1978, Citroën subsequently adopted dual-circuit master cylinder models for both 2CVs equipped with front drum brakes and front disc brakes.
- The seal system: the first generations of 2CVs had copper seals until 1967, before switching to red rubber seals for 2CVs requiring Lockheed Dot 4 brake fluid and green rubber seals for those requiring LHM fluid.
- The diameter of the rigid pipes or brake hoses in the braking system: different diameters were used between 1948 and 1990, changing from 12 mm when the 2CV was launched to 9 mm from 1963 and then to 8 mm after 1973.
- The model of brake pedal 2CV: round pedal for models up to 1967 with a compass system to interact with the master cylinder then fixed to the chassis. Rectangular brake pedal for all models after 1967, with the pedal/master cylinder connection made by means of a long control rod for single-circuit master cylinders (until 1978) and then a shorter rod for ‘double-circuit’ models (from 1978 to 1990).
To select the master cylinder reference that is perfectly suited to your 2CV, please consult the dedicated page in our technical library (in French). There you will find a summary table with all the necessary information according to the model year of your car.

Numerous accessories and peripheral parts for the 2CV master cylinder

Single or double reservoir brake fluid tanks, single or dual circuit brake fluid tanks, long or short master cylinder control rods, reservoir seals, mounting spacers, sealing plates, 2CV brake master cylinder bellows and fixing bolts are among the many peripheral spare parts and accessories that you can also order on this page, whether to repair the master cylinder or optimise its performance.

Please feel free to consult our other sections dedicated to 2CV brakes: front brakes, rear brakes, handbrakes, brake circuits and pedal assemblies.

All our 2CV MASTER CYLINDER products (29)

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MCC Parts
Promo 20%
Master cylinder 08 mm Lockheed - simple circuit
Price
€74.88 VAT inc.
Promo Price -20%
€59.90 VAT inc.
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MCC Parts
Promo 10%
Master cylinder 08 mm LHM - double circuit
Price
€94.13 VAT inc.
Promo Price -10%
€84.71 VAT inc.
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MCC Parts
Promo 15%
Master cylinder 08 mm Lockheed - double circuit
Price
€108.12 VAT inc.
Promo Price -15%
€91.91 VAT inc.
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MCC Parts
Promo 15%
Master cylinder dot 4 (5/67-78)

Master cylinder dot 4 (5/67-78)

Ref. : 1001001 In stock
Price
€77.63 VAT inc.
Promo Price -15%
€65.98 VAT inc.
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MCC Parts
Promo 25%
2cv Lockheed master cylinder 1 exit  (before 9/63)
Price
€99.87 VAT inc.
Promo Price -25%
€74.91 VAT inc.
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MCC Parts
Master cylinder fixing bolts (2 pieces)
Price
€17.88 VAT inc.
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MCC Parts
Plastic reservoir Lockheed – simple circuit
Price
€34.38 VAT inc.
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MCC Parts
Promo 30%
Master cylinder 9/12 Lockheed - simple circuit
Price
€81.50 VAT inc.
Promo Price -30%
€57.05 VAT inc.
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MCC Parts
Promo 20%
2cv Lockheed master cylinder 2 exits  (09/1963 ? 05/1967)
Price
€105.63 VAT inc.
Promo Price -20%
€84.50 VAT inc.
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Brake fluid LHM (1l bottle)

Brake fluid LHM (1l bottle)

Ref. : 1001300 In stock
Price
€15.30 VAT inc.
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MCC Parts
Plastic reservoir cap seal – double circuit
Price
€2.24 VAT inc.
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MCC Parts
Short brake pedal pushrod (88 mm)

Short brake pedal pushrod (88 mm)

Ref. : 1001098 In stock
Price
€3.74 VAT inc.
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MCC Parts
Master cylinder spacer (1 piece)

Master cylinder spacer (1 piece)

Ref. : 1001017 In stock
Price
€4.49 VAT inc.
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MCC Parts
Master cylinder seal

Master cylinder seal

Ref. : 3001100 In stock
Price
€6.24 VAT inc.
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MCC Parts
Promo 5%
Long brake pedal pushrod (105.75 mm)

Long brake pedal pushrod (105.75 mm)

Ref. : 1001099 In stock
Price
€6.36 VAT inc.
Promo Price -5%
€6.04 VAT inc.
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Adaptables Parts
Old master cylinder gaiter

Old master cylinder gaiter

Ref. : 3001050 In stock
Price
€8.36 VAT inc.
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Brake fluid Lockheed Motul (0.5l bottle)
Price
€13.30 VAT inc.
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Brake fluid LHM Motul (1l bottle)

Brake fluid LHM Motul (1l bottle)

Ref. : 1606536 In stock
Price
€13.90 VAT inc.
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Adaptables Parts
Plastic reservoir cap – double circuit
Price
€18.38 VAT inc.
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MCC Parts
Brake pedal bracket

Brake pedal bracket

Ref. : 1003104 In stock
Price
€24.87 VAT inc.
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MCC Parts
Plastic reservoir – double circuit

Plastic reservoir – double circuit

Ref. : 1001360 In stock
Price
€43.62 VAT inc.
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MCC Parts
Lockheed double circuit plastic jar

Lockheed double circuit plastic jar

Ref. : 1001361 In stock
Price
€59.63 VAT inc.
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Brake fluid Lockheed (0.5l bottle)

Brake fluid Lockheed (0.5l bottle)

Ref. : 1001310 In stock
Price
€12.30 VAT inc.
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602 parts
Master cylinder 08 LHM double circuit trw

Master cylinder 08 LHM double circuit trw

Ref. : 1820911 In the process of being replenished
Price
€187.38 VAT inc.
Lockheed brake fluid (1 litre)

Lockheed brake fluid (1 litre)

Ref. : 1005392 In the process of being replenished
Price
€19.90 VAT inc.
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