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Why is my brake pedal hard when I apply the brakes?

Tiny
SFCTRIPLETT57
  • MEMBER
  • 1987 TOYOTA PICKUP
  • 2.4L
  • 4 CYL
  • 4WD
  • MANUAL
  • 155,550 MILES
When I apply the brake pedal it’s hard why is this, what can cause this problem?

Thanks


Larry Triplett

Iraq War Vet
Friday, October 15th, 2021 AT 2:56 PM

10 Replies

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

Typically, hard brake pedal is due to an issue with the vacuum system for the brake booster.
Check the hose that attached to the booster.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Make sure it is secured and does not have any restrictions or crack. It will be a good idea to look over all the vacuum hoses and make sure they are all in good shape.
Also inspect the check valve that is located on the brake booster (at the end of the hose). If that valve is stuck closed, you will have hard pedal.
Another possibility is a bad brake booster.

Let me know what you find or if you have any questions.
Thank you.
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Friday, October 15th, 2021 AT 7:05 PM
Tiny
SFCTRIPLETT57
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Thank you Sir.
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Wednesday, October 20th, 2021 AT 1:07 AM
Tiny
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You are welcome.
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Wednesday, October 20th, 2021 AT 8:03 AM
Tiny
SFCTRIPLETT57
  • MEMBER
  • 184 POSTS
Where is this check valve located on the brake booster?

Thank you Sir.
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Friday, October 22nd, 2021 AT 5:01 AM
Tiny
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Depending on the type of booster the check valve can look different.
Can you upload a picture of the brake booster?
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Friday, October 22nd, 2021 AT 8:12 AM
Tiny
SFCTRIPLETT57
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My truck is in the shop having the carburetor rebuilt.
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Saturday, October 23rd, 2021 AT 11:07 AM
Tiny
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No worries. Those pictures are the two different type of boosters for that truck.
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Saturday, October 23rd, 2021 AT 8:35 PM

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