Failed Brake Inspection each Year

Hey guys,

I hope somebody can help me out with that. I have to go to inspection each year here in Thailand, and each year they report kind of the same issue. They tell me to take a picture, drive to the local car garage, that dude jumps underneath the car, seems to push the break calipers of the drum break back in from around the drum with a flathead screwdriver, and inspection goes thru green after that. It's only on one side.. but I forgot which one.

That issue started since the year I've had the whole drums and internals replaced by exactly the same garage.

My first guess is that when assembling the break back then, they forgot some spring or whatever, and just bushfixed it in (as they always do here) and for that reason those calipers (or whatever he's pushing back in each time) need to be pushed back in.

Both screenshots are from failing that test, first in 2022 then in 2023, after they had been replaced in 2021.

If somebody could give me an explanation what's that all about with those values on the screen would be great. I could do a follow up, and take a picture from inside the drum, if that further helps and if somebody could give me a hint which side it is. It's super hard to get those damn lugnuts off, since those idiots here always use the impact wrench full force.

Thanks for the help

sorry, translation here. I assumed that's some common test and might therefore be clear to somebody at first sight what it is all about

CharlesHS said:

Have you performed a thorough flush of the entire braking system ?

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that brake fluid is probably 10+ years old. While I replaced every other fluid in the TJ last year, for some reason the brake fluid never crossed my mind, since I had the feeling that my brakes are working perfectly fine.. but everything is subjective, since I don't drive any other car... so maybe its bad.

probably best to get that Motive Products Power Bleeder from Amazon.. gonna do some read up in the forum how to flush the brake system..

but shouldn't be related to that pushing something back with the flathead to pass the brake inspections thing

CharlesHS said:

When you remove the cover for the Master Cylinder; does the brake fluid appear dark, milky or muddy in color?

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it's completely clear with nothing in it. I assume when I had all 4 breaks replaced 2021 they toped it up with plenty of new fluid, while bleeding it. Very unlikely they did a full flush. Since how I understand, that fluid doesn't circulate, it could mean while the reservoir is clean new fluid, the lines could still have plenty of gunk in it? But in 2020 one rear break cylinder blew and I lost all break and lots of fluid.. that was probably a forced flush. That was also the reason why I decided to get all new break pars from amazon (break pads, break discs, calipers and everything inside the drums) and had it replaced.

one thing we also have to consider is - that their measurement station at the car inspection is crap, and just throws random numbers they don't care about..

I personally never noticed any issues with the breaks, and it stops like a rock