If the pedal goes all the way to the floor, it can be due to few different reasons.
It could be for having low brake fluid, air in the brake lines, leak in the system, faulty brake master cylinder.
Here is an article that covers the most common cause for pedal to the floor:
https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor
Make sure the brake fluid level is correct. Then bleed the brakes to get any trapped air in the system.
Take a look at this helpful guide for brake bleeding:
https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system
I have attached the rear shoe replacement instructions for anyone else might be looking for that instructions.
Please let me know of any questions.
Thank you.
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Sunday, October 10th, 2021 AT 3:53 PM