ariascarlos1990 Posted March 16, 2008 Report Share Posted March 16, 2008 My rear brakes keep locking up when i barely touch the brake. They are drum in the back and disk up front... does anybody know what could be the cause of this???:confused: thanks in advance! Quote Link to comment
datzenmike Posted March 17, 2008 Report Share Posted March 17, 2008 Does the red brake warning light come on at all when breaking?? If you raise each rear wheel is it free to turn, or are the brakes dragging on one or both? Are the front disc calipers leaking brake fluid on the rotors? Quote Link to comment
ariascarlos1990 Posted March 17, 2008 Author Report Share Posted March 17, 2008 no warning light at all. it does spin freelly. and brakes are not dragging. no leakedge. it locks up when I put on the brakes very jentlly...but only the rear do it. Quote Link to comment
yello620 Posted March 17, 2008 Report Share Posted March 17, 2008 The warning light is ONLY wired to the parking brake, not the brake valve. Have the rear brake been adjusted? Properly? Is this a new problem, or a truck that has been sitting? I am betting on one of three things, maybe all. 1. Nissan load sensing valve on the passenger frame rail is seized internally. Not providing proper fluid transfer to the front brakes. 2. Calipers both seized up. Uncommon that they would both be that way unless the truck has been sitting. 3. A master cylinder that is not providing proper fluid pressure to one half of the system, and that pisses off the load valve on the frame rail. Have you done any inspections of what might be wrong? Saw you other post about how to remove a front hub, this is very basic. I am a little nervous about that question and now you are trying to work on brakes. Give us some background of you abilities to work on brakes safely. Jason Quote Link to comment
fiveNdime Posted March 18, 2008 Report Share Posted March 18, 2008 I had a similar problem with my 521. It had sat a while at least a couple years outside. I got it road worthy and last check on the brakes I noticed them locking up when I spun them manualy. They locked up in the forward motion but not reverse. I then adjusted my brakes out just a tad and it seemed to be the cause. I also loosened up my ebrake lines cause they were sticking so that brakes were applied. This I am sure was more of the problem for me. Quote Link to comment
ariascarlos1990 Posted March 18, 2008 Author Report Share Posted March 18, 2008 The truck has been sitting for i think 4 years. They dont lock up every time know that they have been worn in. And as for the hubs... I've never took a hubs off a datsun i was just wondering if there was an easier way or a trick of some kind. Quote Link to comment
]2eDeYe Posted March 18, 2008 Report Share Posted March 18, 2008 They are easy to remove. Check http://www.the620.com and download the pdf manual for your truck, like was said in the other thread ;) If you run into problems, ask away...in this thread :) Quote Link to comment
ariascarlos1990 Posted March 18, 2008 Author Report Share Posted March 18, 2008 aight..i just looked at them and got it off... thanks! Quote Link to comment
djmoreron Posted March 19, 2008 Report Share Posted March 19, 2008 i had the same problem after my truck had been sitting for years. i think i had some springs missing, needed a new master cylinder, etc... post what you find. you could help someone else too! Quote Link to comment
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