My truck is pulling hard to driver's side when braking. When I say hard, I mean it will shoot off of the road. What I have:
98 Disco w/
5in lift
SG 3-link
Fox shocks
D90/DBA brakes
3deg castor
No ABS...no fuses, no modulator, no sensors
BFG KM2s (new)


What I have tried:
swapped all brake related parts in front left to right
new pads, rotors, and calipers all around
new stainless lines all around
new hard lines in front
new (used) prop valve (also tried not running one)
new bushings all around
new 3rd link (teraflex jointed)
alingnment
power bleed after every "adjustment"


Any suggestions are welcome

Thanks

Chad

(I know the panhard adj nut is not tight, was adjusting when I took pics)

How well are the calipers moving on the slides. It sounds like you only getting inside pad only on one side or the other. look a your pads and see if the inner pad is wore out more than the other pad.

Hi,

do you have access to a brake test rig ?

Likewise:
http://www.pruefstand.com/images/angebot/big/Multiflex05new.jpg

http://www.werkstattausruestung.com/news/beissbarth/beissbarth_mb8100_05.jpg

that would quickly help you identify the offending wheel.
Every 2 years the road registered cars over here have to see the MOT test and check of the brakes (like pictured above) is very much part of the test routine. So I would have to problem to find a place. Some garages do have them, too.

I only remeber the brake behaviour you described when one rotor was oily. But you would have seen that.
By when did your rig start the "race brake" ??
;)

only a chance - try braking with the steering damper disconnected !

(The steering damper rests at a rather great angle to the steering rod, btw. I could imagine that the original place parallel to the track rod is better for it. But ok, you´ve given that place to the 3link. Is all the 5" of lift achieved by the springs ? BTW: if there is bump-steer, is there also kind of brake-steer??)

How well are the calipers moving on the slides. It sounds like you only getting inside pad only on one side or the other. look a your pads and see if the inner pad is wore out more than the other pad.

As much as I hate to agree with a person who seems to ask non-sensical questions, in this case, he might just speak the truth.

Do you have any weird wear patterns on the rotors? One pads worn more than the others?

You're in Canuckistan, it's more than likely you have a corroded caliper piston that has decided to seize.

PTS I am shocked. I thought Pirate was a place to talk about and learn about offroad specific tech. I am a rookie OFFROAD wrench and Fabricator not a rookie wrench on general mechanics or fabrication. I will get the offroad thing down but until then I will ask lots of questions to in an effort to not waste time or money. Flame on, Lol.

Thanks for all of the suggestions. I will try all of them tonight.

The lift is via 5" springs.
The rotors and calipers are all new Pro-line. I will double check pad and rotor wear asap.
I don't have any bump steer.

Chad

PTS I am shocked. I thought Pirate was a place to talk about and learn about offroad specific tech. I am a rookie OFFROAD wrench and Fabricator not a rookie wrench on general mechanics or fabrication. I will get the offroad thing down but until then I will ask lots of questions to in an effort to not waste time or money. Flame on, Lol.

OK, maybe I was mistaken. I admit that sometimes, my first impressions are not necessarily correct.

Wasting of time and money tends to be a great educator. Trust me, I've wasted enough of both in the past 40 years.

Now, do something that impresses us :flipoff2:

(most of the questions you are likely to ask have already been answered in general terms. Search is your friend)

Chad,

not that is has sth. to do with the brake problem, but are the brake lines as close to the tyre as it appears to be on the pic ?? I think it looks as if the could be a little further apart.

and I still think a too-stiff or sticking steering damper could cause the problem - when the front of the car "dives down" and the steering damper kind of acts as a "locked bar" and, relatively seen, pushes the steering link to the left.
Especially with the sort of angle it rests towards the steering link.

Chad,

not that is has sth. to do with the brake problem, but are the brake lines as close to the tyre as it appears to be on the pic ?? I think it looks as if the could be a little further apart.

Yes, they are that close. They do not rub though.

I'm going to pull the stabilizer in the morning and see what happens on the way to work.

Pad wear looks even.

Is it possible that axle location could cause this? With the 3link up front and johnny joints on the rear links, I could have an issue there. I've taken many measurments and feel I have everything square, but could be wrong. Any suggestions on methods?

Thanks

Chad

Whats your swivel pre-load?

Whats your swivel pre-load?

I think I'm about 12-14lbs on the fish scale. I have a leaking seal, so I'll be in there soon...

Could the geometry of your 3 link cause this???

Could the geometry of your 3 link cause this???

Yup... Check the bushings.. All three.. The center one is prone to failure but I've had an outer fail and caused terrible braking control..

The center link is new and has teraflex joint on one end and bushing on the axle end. Frame and axle bushes are new teraflex. I'll take a look at the axle ends while I'm under there. Only takes a min.

I pulled the stabilizer and am going for a drive now. Fingers crossed...

:bounce2: tellme-tellme :)

:bounce2: tellme-tellme :)

I wish I had better news. I do like the steering response better without the stabilizer, but removing it did not entirely fix my problem. Oddly enough, it seems to have changed the frequency and severity to which the brakes pull. If I could get off of work on time, I would be able to tear into it more. I've got all of my parts laying around to put my hydro assist on, but don't want to start that until I figure this out