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Master brake cylinder  installation

Quick info of how to connect an aftermarket master brake cylinder on to a brake system. The information applies to all sizes of cylinders. 0.625 "- 0.7" - 0.75 "- 0.875" - 1.0 ". The guide is made with OBP and Girling brake cylinders for reference.

AN3  thread = 3/8" -24 and AN4 thread = 7/16" -20

 
 
 

outlet

Master brake cylinder outlet (pressure side)

Thread The outlet is angled and has 3/8 "-24 thread with a convex cone at the bottom. Imperial thread has become a kind of market standard.

Seal It is possible to use adapters to seal against the cone in the bottom. These adapters need to be concave. It's also possible to use a washer to seal against the top surface at the master brake cylinder.

Size of the brake pipe used is 3/16 "and the size of the brake hose is 1/8".

outlet - brake pipe

outlet - brake hose

Brake hose builder SS

Brake hose builder SS

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Stainless steel fittin...
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Brake hose builder

Brake hose builder

£ 3
Anodized steel fitting...
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outlet - adapters

 
 
 

inlet

Master brake cylinder (inlet)

Thread The inlet is located at the end of the brake cylinder and has a 7/16 "-20 thread with a concave cone in the bottom. Imperial thread has become a kind of market standard.

Sealing It is possible to use adapters to seal against the cone in the bottom. These adapters need to be convex. It's also possible to use a washer to seal against the top surface at the master brake cylinder.

Size Brake pipe and hose is 1/4 ". Sometimes 7/16" thread is also used together with 3/16 "brake pipe, so pay attention to the information.

inlet - brake pipe

inlet - brake hose

inlet - adapters