Author Topic: Brake issue. (Read 3601 times)

mycollegetoy · « **on:** May 27, 2006, 05:05:02 PM »

Alright so recently I was driving around and all of a sudden as I went to hit the brakes they went almost all the way to the floor before they worked...I've had this happen before and knew that they needed bled....air in the lines...well sure enough I went to start at the rear and about 80% of what came out was air when I went to bleed em'. I thought this was odd...so i went tried the front, and it came out fine. I came to find out that my Master Cylinder was gone. Replaced it, and they bled fine, but when I went to drive it...the rear passenger brakes locked up on the drum. It was very hot to the touch. I knocked it off with a hammer, cleaned out the springs and all the brake stuff, then went out to drive it and started shaking real bad and felt like it was dragging to one side..went to feel the rear drums again and they feel fine, but now my fronts are giving me problems...what's going on?

Anybondy? Sorry so long.....Real quick I have checked my tires are they are fine, so the shaking is not from misalignment...and there is also I high pitched squeel like metal on metal. Pads are new, brakes are bled....e-brake not draggin...what could it be...any help would be greatly appreciated..
Dustin

mycollegetoy · « **Reply #1 on:** May 27, 2006, 05:10:05 PM »

Oh and for your info....I have an 87 standard cab short bed with an 84 or 85 straight axle. Gears are new and show no signs of malfunction, oil is clean with no shavings (just in case this helps) it is a 4cyl. with manual tranny....Also, when I was trying to replace the rear brakes, I thought they would be for a 4cyl. axle but found out all my springs and stuff were exactly like the kit for the one ton...does this sound right??

79coyotefrg · « **Reply #2 on:** May 27, 2006, 05:38:36 PM »

sounds like you got a mastercyl with a residual valve for the rears, so its still holding pressure on the rear brakes, also what mods have you dont to the lspv

mycollegetoy · « **Reply #3 on:** May 27, 2006, 06:02:11 PM »

by holding pressure do you mean catching up still? because the drums felt fine to touch and I was able to pull them off just fine after I cleaned them, so I don't think they are my problem anymore...now my front rotors are the solid ones and when I went to touched those to see if they were okay...they burnt me..I figured because they were not the slotted ones to allow more air flow...could my rotors possibly have warp and now that I have a new master cylinder on it's causing my pads to catch up? First started with the issues in the rear and now seems to have moved to the front....also, not too sure what lspv means? Sorry.

DTB · « **Reply #4 on:** May 27, 2006, 06:15:43 PM »

LPSV= Load proportioning sensing valve

mycollegetoy · « **Reply #5 on:** May 27, 2006, 06:34:02 PM »

this is the little valve located up under the bed right? for this I have not done any mods...it does look like there is a rod that comes out of it that probably went to the axle or something that just hangs there.....is there nay mods I could do to the valve that might help?

DTB · « **Reply #6 on:** May 27, 2006, 06:45:59 PM »

Your LPSV is located on a bracket above your rear axle. it controls the braking proportions between front and rear. http://board.marlincrawler.com/index.php?topic=20144.0

79coyotefrg · « **Reply #7 on:** May 27, 2006, 06:51:34 PM »

tie it all the way up against the bed
if its hanging down your not getting any pressure to the rear brakes, so the fronts are doing ALL the work

mycollegetoy · « **Reply #8 on:** May 27, 2006, 06:54:01 PM »

right...it controls the amount of braking when you have weight or no weight in your truck...I have done no mods to this at all...except for that hard line that was cut off that used to go to the top of the diff...other than that I have done nothin...I replaced the brakes, the spring kit in the brakes, the mastercyl..I'm getting good flow when I bleed the brakes, it's just hangin up on something and puts off a loud squeel noise...this the squeel could be from warped rotors..but the shakes...It's hanging up on somethin

mycollegetoy · « **Reply #9 on:** May 27, 2006, 06:55:11 PM »

Thanks for the idea..I'll do that

Quote from: 79Coyotefrg on May 27, 2006, 06:51:34 PM

tie it all the way up against the bed
if its hanging down your not getting any pressure to the rear brakes, so the fronts are doing ALL the work

Quote from: 79Coyotefrg on May 27, 2006, 06:51:34 PM

tie it all the way up against the bed
if its hanging down your not getting any pressure to the rear brakes, so the fronts are doing ALL the work

brainlessfool · « **Reply #10 on:** May 27, 2006, 06:56:42 PM »

Does your steering wheel shake at all with your foot on the brakes? if so you need to turn your rotors.

And do you get any "feed back" though you brake pedal with your foot on it?

mycollegetoy · « **Reply #11 on:** May 27, 2006, 07:08:50 PM »

yes my steering wheel does shake with my foot on it..my driver rotor has grooves in it from the moron before me...I plan on getting some vented rotors for it when I replace them instead of turning them. I'm thinking my high squeel noise is from the rotors being warped...I do get some feedback through the brake pedal when my foot is on it...

eightyfive · « **Reply #12 on:** May 28, 2006, 01:17:23 AM »

did you get oil onto the rotor? if so, you might have some hardspots on the rotor causing the shaking. my solid rotors are also pretty much toast...also just waiting on parts and more knowledge on swapping the vented ones on.

mycollegetoy · « **Reply #13 on:** May 28, 2006, 05:36:53 AM »

I could have maybe got some on there when I changed out the felt pads the other weekend...I'll check again but pretty sure they don't...but I guess even a little bit matters...

79coyotefrg · « **Reply #14 on:** May 28, 2006, 07:24:37 AM »

Quote from: mycollegetoy on May 27, 2006, 07:08:50 PM

yes my steering wheel does shake with my foot on it..my driver rotor has grooves in it from the moron before me...I plan on getting some vented rotors for it when I replace them instead of turning them. I'm thinking my high squeel noise is from the rotors being warped...I do get some feedback through the brake pedal when my foot is on it...

rotors are warped but i wouldnt have them turned it just makes things worse in the long run

i have some 86 calipers i'll sell you cheap

mycollegetoy · « **Reply #15 on:** May 29, 2006, 05:38:34 PM »

Quote from: 79Coyotefrg on May 28, 2006, 07:24:37 AM

rotors are warped but i wouldnt have them turned it just makes things worse in the long run

i have some 86 calipers i'll sell you cheap

Hey coyote, sent you a PM...

BUBBA · « **Reply #16 on:** May 29, 2006, 06:09:23 PM »

Are both the front's still holding pressure after it you've let off the brake pedal?

If it's just one side I would say you have a bad rubber line,but if it's both I'd say you have a bad master cylinder.
It's probably sticking and not releasing the pressure from the fronts.

79coyotefrg · « **Reply #17 on:** May 29, 2006, 06:19:08 PM »

Quote from: mycollegetoy on May 29, 2006, 05:38:34 PM

Hey coyote, sent you a PM...

got it dude, pmed you back

kilercl0ne · « **Reply #18 on:** May 29, 2006, 07:53:45 PM »

stop the insanity time 4 an up grade get over to kragen and get a set of land cruiser rotors and calipers hupefully your hubs will work but if not put those on the list , think about this what if your brakes don't work whats the worst that could happen ?

mycollegetoy · « **Reply #19 on:** May 29, 2006, 08:23:52 PM »

Quote from: kilercl0ne on May 29, 2006, 07:53:45 PM

stop the insanity time 4 an up grade get over to kragen and get a set of land cruiser rotors and calipers hupefully your hubs will work but if not put those on the list , think about this what if your brakes don't work whats the worst that could happen ?

Wow, I don't know where to begin with this statement...First of all, I am planning on upgrading, I even mentioned it in a previous post (reply #11) and why make more work for myself by having to get new hubs??/ mine work just fine, it's my brakes I have issues with so why not replace parts that allow me to use the hubs I have..and finally, your quote about what's the worst that could happen if I don't have no brakes was funny...but I don't think you intended it in that way....wierd post...but thanks for the idea about checking into kragen....

79coyotefrg · « **Reply #20 on:** May 29, 2006, 08:26:58 PM »

Quote from: kilercl0ne on May 29, 2006, 07:53:45 PM

stop the insanity time 4 an up grade get over to kragen and get a set of land cruiser rotors and calipers hupefully your hubs will work but if not put those on the list , think about this what if your brakes don't work whats the worst that could happen ?

killerklone, dont make me do it

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