Passenger rear drum brake uneven pressure when braking

1986 FORD F-150
65,000 MILES • 5.0L • V8 • 2WD • MANUAL
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F1501986
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Replaced wheel cylinder assembly and other brake components and hard brake line (which had a hole) bled brakes so no air in line. What is causing uneven braking pressure?
Jun 2, 2021 at 9:03 AM
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ASEMASTER6371
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Good morning,

This could be the master cylinder. The way the system works is the master cylinder sends pressure to the right front and left rear from one line. Then the other line goes to the left front and right rear.

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

If you have unequal pressure, most likely it is the master cylinder.

Roy
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Jun 2, 2021 at 9:33 AM
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F1501986
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I understand that if its uneven from front to rear but the unevenness is only on one rear wheel, just the passenger rear. Driver rear is applying adequate force.
Jun 2, 2021 at 12:28 PM
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ASEMASTER6371
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Okay, I understand. It still points to the master cylinder.

Roy
Jun 2, 2021 at 2:53 PM
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F1501986
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Thanks for your assistance; I'll try a replacement and see how it goes!
Jun 3, 2021 at 4:09 AM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Jun 3, 2021 at 4:21 AM