SPONSORED LINKS

Passenger rear drum brake uneven pressure when braking

Tiny
F1501986
  • MEMBER
  • 1986 FORD F-150
  • 5.0L
  • V8
  • 2WD
  • MANUAL
  • 65,000 MILES
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?
Wednesday, June 2nd, 2021 AT 9:03 AM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
Images (Click to make bigger)
Thumb
Thumb
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Wednesday, June 2nd, 2021 AT 9:33 AM
Tiny
F1501986
  • MEMBER
  • 3 POSTS
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.
Was this
answer
helpful?
Yes
No
Wednesday, June 2nd, 2021 AT 12:28 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay, I understand. It still points to the master cylinder.

Roy
Was this
answer
helpful?
Yes
No
Wednesday, June 2nd, 2021 AT 2:53 PM
Tiny
F1501986
  • MEMBER
  • 3 POSTS
Thanks for your assistance; I'll try a replacement and see how it goes!
Was this
answer
helpful?
Yes
No
Thursday, June 3rd, 2021 AT 4:09 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, June 3rd, 2021 AT 4:21 AM

Please login or register to post a reply.

Related Brake Drum Content

How to Remove a Stuck Brake Drum
VIDEO
How to Remove a Stuck Brake Drum
Instructional repair video
Drum Stuck On Axle Flange
GUIDE
Drum Stuck On Axle Flange
It is common for a brake drum to get stuck on the axle flange due to moisture and heat of the freshly machined metal exposed by the manufacturing process on both the axle...
VIEW MORE

Sponsored links