On which of the following types of calipers should air pressure not be used to remove caliper pistons?
A. Single piston
B. Dual piston.
C. Four piston.
D. None of the above.
I believe the answer is D. None of the above. But was hoping someone on here could confirm. I do not see why the number of pistons would impact using air on the caliper. I know that if one piston is completley removed from the caliper, you won’t be able to use air to remove the other pistons, becuase the air will escape through the bore that had the piston that was removed. So you are supposed to use a block of wood or something, apply air and ensure that the all of the pistons are partially removed, and one is not completely removed.
Although I can’t even begin to tell you how many times I have used air to remove pistons from calipers for various reasons, I am pretty sure due to safety reasons, the answer is D, None of the above…
Hint on taking the ■■■■, if you have a technician A says blah blah and technician B says blah blah, think of them as being in different states working on different vehicles, another wards, answer Tech A question and then answer Tech B question separately, then answer A or B or Both or Neither…
BTW my redacted word was t-e-s-t, why in the world would t e s t and even stu-pid be redacted but idiot is not???
Chapter of what ? A real course book or just some random online thing . What is your goal ? If you state your goal there are some very good mechanics here that can help you.
Some of us are not good at taking multiple choice tests because we analyze it too much. We could write a narrative explaining why but that would be hard to grade. Yeah I flunked the questions for social security electronic access because I didn’t remember a license plate number from five years ago. Thought it was a trick question. I still haven’t appeared in person to prove my identity.
I have used air pressure on 1, 2 and 4 piston calipers successfully.
Safety first though! You should place a block of wood where the rotors go so the pistons don’t come shooting out and hurt someone. You want them stopped by something. A rag is useful, too, since brake fluid will come blasting out as well.
Thank you for the replies and help. I do belive the answer is D, and that seems to be the consensus here as well. This is for the brakes ASE exam study guide, and going through practice questions. The text didn’t really say either way, so applied the logic discussed here. Thank you!
I’m no professional but does any mechanic today rebuild calipers? Does the ASE exam need to be updated for how things are done today versus 30 years ago? As far as I know, no modern repair shop can make money rebuilding things like calipers, starter motors, alternators and so on like many years past. They swap them out and send back a core for rebuilding in a mass production environment where it makes economic sense to do so.
In all my DIY years, the only way I ever removed a caliper piston is with air. Always stick a board thick enough to stop the piston seal from leaving the bore so it matters not how many pistons there are, they all end up protruding from their bores but not so far as to be a danger flying out of the bore, create an air leak or ■■■■ out fluid.
Sol the word “b l o w” is offensive in this context? Another fine example of automatic decision making…
