redrover
Well-Known Member
Hi Guys,
I installed my new CompBrake master cylinders yesterday. All went smoothly except for the brake feed pipe (from the reservoir), which I can't connect up. The flanged end of the pipe seats nicely, but the screw union can't pick up the thread. It's as if it's hitting a shoulder.
I have contacted CompBrake for the union specification, and they have confirmed it is a 7/16-20 thread (see attachment). My question is what is the thread of the standard union? I'm about to have a complete set of cupronickel brake lines made up, and basically need to try and work out if I need to specify a different union on the feed pipe (7/16-20 instead of whatever is on the car), or whether the cylinder itself is defective.
Thanks in advance
Michael![DSC_7272.JPG DSC_7272.JPG](https://classicroverforum.net/data/attachments/23/23661-5e5d927d60c56b3e00d2401361a9a9b8.jpg)
![MASTER-CYLINDER-[SETUP-GUIDE]-DIAGRAM.jpg MASTER-CYLINDER-[SETUP-GUIDE]-DIAGRAM.jpg](https://classicroverforum.net/data/attachments/23/23662-ef0ff049113bb9228d84c38564c208ac.jpg)
I installed my new CompBrake master cylinders yesterday. All went smoothly except for the brake feed pipe (from the reservoir), which I can't connect up. The flanged end of the pipe seats nicely, but the screw union can't pick up the thread. It's as if it's hitting a shoulder.
I have contacted CompBrake for the union specification, and they have confirmed it is a 7/16-20 thread (see attachment). My question is what is the thread of the standard union? I'm about to have a complete set of cupronickel brake lines made up, and basically need to try and work out if I need to specify a different union on the feed pipe (7/16-20 instead of whatever is on the car), or whether the cylinder itself is defective.
Thanks in advance
Michael
![DSC_7272.JPG DSC_7272.JPG](https://classicroverforum.net/data/attachments/23/23661-5e5d927d60c56b3e00d2401361a9a9b8.jpg)
![MASTER-CYLINDER-[SETUP-GUIDE]-DIAGRAM.jpg MASTER-CYLINDER-[SETUP-GUIDE]-DIAGRAM.jpg](https://classicroverforum.net/data/attachments/23/23662-ef0ff049113bb9228d84c38564c208ac.jpg)