front brakes...

Ok...I need some help! After I drive my truck for a little while the left front caliper starts to stick-stay compressed onto the rotor causing the brakes to squeal!! I bleed the brakes & they dont have air in the lines & the pedal has good pressure on it when you push it...so what could it be? The truck did sit up for several years & was thinking maybe there is some trash or something in the lines or could the caliper just be bad?? The right side is fine, but the squealing is getting to me...not to mention all the brake dust it leaves on my rim after too lol!!

replace or rebuild the caliper. They are cheap to replace,

You know, they are designed to stay in minimal contact with the rotor so that when you hit the brakes they work immediately. Are your pads good? There are indicators that begin to rub the rotor and squeel so you know they need replacing. Also, if you rebuild your caliper or replace it (most stores will sell you a reconditioned one with a core trade in) chech the condition of your fluid and if it's really dirty, change as much of it as you can.

Did you recently lower the truck? If so the load/portioning valve will cause the front brakes to drag! Readjust or remove!

As long as you are still using the stock brake lines and proportioning valve, it should not be the problem. Removing the proportioning valve is dangerous unless you replace it with and adjustable aftermarket valve AND know how to adjust it properly. The job of the valve is to compensate for the extra length of lines going to the rear and to insure the front or rear brakes don't lock up because of unequal brake line pressure.

The truck has been lowered since I owned it & I didnt have any problems, but like I said earlier...it did sit up for several years. The pads were replaced right before I stopped driving it & the rotors are good...Im going to
try & remove all the old fluid & replace it & if that doesnt help the swap the caliper. Thanks for the input guys...much help!!

The proportioning valve on Toyota trucks responds to the rear height of the truck,with a load & without. In turn with a load applies more braking on the front brakes. When you lower the truck this drags the front brakes. I had to replace the rotors due to this !!! Also have had this removed for 4 years no problems! Will have a proportioning valve when disks are at the rear!Also keep both lines to the rear,one is a return line that helps equal the pressure!

So..if I just take the proportion valve off will it require me to block anything off or what?? Hit me up with some tips on this from all you guys that took it off!

Check the sliders. They are on the caliper bracket. They are what the caliper bolts to. Alot of the time the rubber boots get dryrotted and moisture gets inside causing them to stick. They should slide in and out very easy. If they don't, just pull them out with locking pliers, clean them and re-lube(lithium grease works the best). I hope this helps

ok, so you were refering to the valve over the rear axle. My bad. Yes , you can remove that valve. I thaught you were talking about the main valve outside the reservior, where the lines split off to the front and rear.