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How to replace a master cylinder on a 1948 S11 Desoto

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From the manual

- Disconnect the brake line
tubes at the master cylinder. Disconnect
brake pedal from master cylinder. Remove
the bolts which attach master cylinder to
chassis and lift out the master cylinder assembly.

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  • 2 months later...

Someone has already told you how to remove the master cylinder, one thing people don't always do is bench bleed the cylinder before installing to remove the air.

Secure it in a bench vise run lines from the port to the reservoir and fill with fluid, start pumping the pedal until the air is out. When you go to bleeding the brakes start at the farthest cylinder from the master cylinder. I would suggest using Dot 3 brake fluid.

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