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A Scroop Posted on Mar 06, 2014
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Brakes jammed on

It drives for a little bit and when warms up, it won't move. How can we free them up

  • Michael Finlay Mar 08, 2014

    sounds like the calibers are frozen out

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1 Answer

Lodhi Autos

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  • Toyota Master 992 Answers
  • Posted on Mar 06, 2014
Lodhi Autos
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The causes and remedy for brake jamming:
As a first aid, loosen and then tighten any one of the front wheel bleeding nipple. This will free up the brakes.
- Front calipers pins jammed. (Re-grease the pins with graphite grease)
- Front calipers pistons jammed. (Remove the caliper one by one, do not remove the brake pipe, depress the brake pedal only one time then release, lift the caliper boot at one side with abrupt tool, just as we lift up our eye lid with thumb and index finger, pour few drops of brake oil DOT 3 into the boot, push back the piston to allow the caliper to fit on pads.
- Rear wheel's pistons jammed. (Free up the pistons, inspect the brake washers, replace rear wheel cylinders if brake washers are found swollen).
- Brake master cylinder defective. The brake jamming problem often arises when the brake master cylinder washers swell up due to aging or using wrong grade of brake oil. In such cases the washers expand and block the return line of the brake oil. If so, replace the brake master cylinder with original one.

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I have 2003 gallant, Islammed on the brakes really hard, tried to drive the car from that spot, go in gear but wouldn't move, front wheels roll, rear wheels are locked up.

If rear brakes are drum-type it is possible the shoes are jammed on the drums. They are normally retracted from there by springs, but if there is breakage or corrosion they can jam in place. One place corrosion occurs is in the wheel brake cylinders, so then the pistons do not return properly,

The same can happen with disc brakes as the pads are normally pulled back after application, just a little, by the springiness of the rubber parts on the pistons. So if there is corrosion in the calipers the pistons can stick.

Then, if disc brake pads are worn right down, I have heard of cases where the piston popped right out of the caliper on heavy braking, or else turned a bit sideways and jammed on. It should never happen, but apparently did.

If disc brakes you should be able to see this when the wheel is off. The calipers can then be removed. If drum brakes try hammering on the outside rim of the drums, this way and that, to get enough de-jamming to get the drums off.
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Hello and welcome to FixYa!
The brakes may have been stuck. When it's forced the car tends to shake but won't move. You may need to bleed the brake lines or replace the brake pistons if necessary. If they are worn out it tends to be stuck.
Hope this helps and thank you for using FixYa! Have a good one!
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now the front wheels should be ok you can try them by jacking each wheel up and try spinning them by hand the front will be stiff but should turn with a bit of force.

how ever you could also jack the back wheels up to check they are solid if they are then you have two options the first would be to give the back wheels a few hits with a big hammer, you will need to hit them pretty hard and doing this should free the brakes enough for you to get the car moving. do this to both sides and you should find you can then use the car.

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your brakes wont be much good to start of with as they will be badly corroded so bare this in mind when driving.

you may need to hit the center of the wheels a few times then try moving forwards and backwards then you may need to hit the center of the wheel again, it may take a while but it will free up if you keep going.

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