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Toyota 4x4 hilux brakes locking up after an hour of driving why???????? john 4-12-03  
Toyota 1987 4x4 hilux with drum brakes.brakes lock up gradualy after an hour of driving especialy in long trafic.i changed wheel cylinders.and propery adjusted them thinking i solved the problem two of them where sciesed.but the problem remained.i changed master cylinder.but still problem remaind.i adjusted the play in the prake peddle into the power brake servo.still no good.i cant put my finger on the problem.since the brake lines are running so close to the exaust manifold and muffler.i am think that the brake lines are got hot and expanding the hydolic oil in the brake lines.is this a possibility or not.i cant understand why the brake line runns so close to the exaust manifold.a stupid toyota mistake i guess.
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? Arthur Helwig 7-30-11  
I work in Nigeria, Africa and have 3 2008 Hilux 4x4 behicles because of the difficult terrain. The brake pads on these vehicles last only for less than 2999 klms. It has been a constant problem to keep the vehicles roadworthy because of bad brakes. The same is true when the aorigninal pads are purchased fromthe dealership. On serveral occasions accidents have been narrowly avoided. I am in the USA now and if there is some advice or help of any level to sovle this problem it would ge greatly appreicated. Unless I can get some help the new vehicles we need to purchase will not be this brand name. Arthur Helwig.
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? Sam Watson 4-12-03  
Sounds like you've covered everything EXCEPT checking the clearance between the master cylinder pushrod and the servo. You can check this by taking a wrench that fits the front or rear wheel cylinder bleed screws. Next time the brakes start to drag, pull over to a safe place and crack one of the bleeder screws. If there is pressure in the system the fluid will squirt out and you will know that there is no clearance between the servo and the master cylinder push rod. Correct as needed.
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? owen 6-2-03  
My new hilux was locking the brakes (rear)and the dealer cleaned them a couple of times and the service bloke didnt believe me until i got him to ty and drive off from the bay where the mechs had left it. They fixed it then the next time I had a wheellockup on one side I found the bearing seal had been leaking into the drum. Fixed that on warrantly and no trouble since. Up to sixty thou on the clock now. Friend told me that traveling through briny water will leave an impregnation of salt in the linings and lockup the drums when the brake is aplied. Solution here is to emery off a little of the pad surface.
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? jd 4-13-03  
I had a Toyota car do something like this but it was the front disk brakes. Turned out the little relief port that makes sure any built-up pressure bleeds off (so brakes don't drag!) had grown shut with rust. Very tiny hole, around 1/16". Cleaning that solved my problem but I see you put on a new/rebuilt master cylinder. Sam's probably got you on the right track, but you mention the flexible hoses. They can fail into a condition that they're like a check valve. Pedal pressure will get fluid to apply the brakes but the fluid does not all return when the pedal is released. This looks like one we can all learn from, so be sure to let us know what happens.
God Bless, jd
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? ben 6-14-03  
Your handbrake lever is siezed to the backing plate. common saltwater fault. or is there a self-adjusting ratchet and are they installed propley and work. Rap your effected pipes with aluminium foil (shinny side out). Change your Brake fluid, new fluid will not expand under extream heat.
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? Steve 8-14-07  
I've got the same problem on my '97 Corolla. Just replaced the master cylinder, front pads, rotors, hoses, calipers and rear hoses, cylinders, discs, and shoes. Oh yeah, and the pcv valve...will repost if I learn anything.
Re: toyota 4x4 hilux 1991 why cant i get the front discs off ?? pat 10-30-07  
I need to change the front discs as they are seriously no good.
Have taken off all the usual wheel caliper e.t.c the little 10mm retaining nut on the end of the shaft, but the discs seem welded on !!!!
PLEASE CAN ANYONE TELL ME WHAT I NEED TO DO ?????
Many thank's
PAT
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? keisha 7-30-06  
Why are
my brakes locking aftr 15 mins of driving
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? randal 9-10-03  
I had a truck burn its back wheels off after driving it for a couple of hours. turned out that the mechanic replaced the master cylinder and didn't check to see if there was free play at the brake pedal rod to the piston of the master cylinder.the little hole which lets out that built up pressure from the expansion of the fluid is blocked off if the piston doesn't return back to its stop.
Re: toyota 4x4 hilux brakes locking up after an hour of driving why???????? nate 9-29-03  
Just put discs on it!!!
Re: toyota 4x4 hilux brakes locking up John 10-24-06  
Toyota 4x4 hilux back brakes locking up when cold and applying the brakes after replacing brake linings.
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