Load proportioning valve??

[13101093]

I have the dreaded brake squeil on my AU ute only when turning right and it actually goes away when turning left. it also is louder at higher speeds.

I have adjusted the handbrake way back so that it barely works to test if thats it and i dont think it is. the reason for this is that if i touch on the brakes then the noise stops but if i pull the handbrake it makes no difference.

I took apart the rear calipers and cleaned and re greased the slides as they were a bit stuck however the sliding pins were a bit rusty.

Now the noise is a bit worse, it seems, with some weight in the back of the ute, is it possible the load proprioning valve is stuffing me around? or should i try new caliper pins first.

[mik]

just a thought, in the past if i had an inkling it might be a bit of movement with the metal part of the pad or a pin or anti squeal plates against another metal part of the caliper making noise, i would rub the smallest of the smallest bit of graphite grease on the affected parts, and i mean small enough so it could`nt possibly get on the friction area and affect braking !!!
i would`nt bother with replacing the pin, i would just lube it, i don`t know about the valve(it seems unlikely to me).
the only other thing i can think of is there might be a bit of runout in the rotor, it might have small high/s spot on it causing a glazed spot on the pad, so when you go around corner x with the slight flex of the axle the pad is touching the high spot on the rotor,
i don`t know mate, just theory.

[BHDOGS]

Sorry to enter thread but it kinda related to this I notice one of my caliper pin bolt rubbers has broken where do you get new ones?

[mik]

ford spares, most brake parts places would have them, you could order them through repco/bursons,etc if they did`nt have them.

[b2tf]

Do the AU utes actually run load proportioning valves? Must admit I never really paid much attention to the braking system but I didnt think they had one.

[13101093]

yes my ute does have one, well it certainly looks like one. and i would not be suprised as mine is a 1 tonne, they might not have it on 3/4 tonne utes or XR's.

thanks mik, i think it definately a 'rotational' noise not pad vibration and the disks are 6 month old brembo ones so i dont think they have runout and i can not feel any wobble at all.

BHDOGS, i will be asking around for new pins and i might get new rubbers too if i am successful i will let you know but my first try will be a brake shop.

[Kryton]

Yes, the AU utes do run a LPV.

[TheInterceptor]

Im experiencing much of the same problem except after today, im hearing the same squeal while the car is NOT turning but going in a straight line! And mines a wagon... It has had the turning squeak for a couple of months now.

Rotational noise, squeak squeak squeak, co-relates with speed...applying the footbrake and handbrake do nothing to the sound. Doesn't do it everytime but often enough. Unsure of what the go here is.

[BHDOGS]

Wheel bearings I'd say

[hagarone]

Only the 1 tonners run load proportioning valves.

[toyotaxr8]

Xr utes do not have a lpv fitted

[13101093]

well the noise is persisting, so i will be trying new caliper pins first, then onto wheel bearings if the noise does not stop after that.

[TheInterceptor]

Let us know how you go!