Patrol wiel sporing

[Terven]

Ek het n 2008 Patrol wat links trek,ek het al by 5 verskillende plekke die wielsporing laat nagaan/doen.Almal se dat daar geen fout volgens die instellings masjiene is nie.Ek het al die bande geruil - al die kante toe, maar daar is geen verskil nie.Ook al ander soort bande probeer maar dit maak ook nie n verskil nie.Die links trek het begin so +- 4000kms nadat ek n volledige TJM suspensie (skokbrekers,vere en "castor correction bushes") laat insit het.Ek het al die Patrol weer na LA Sport in PTA gevat maar volgens hulle is alles reg.

Daar moet tog erens iemand wees met kennis,raad of ondervinding oor hierdie probleem,HELP ASSEBLIEF.

Dankie

Terven Venter (082 898 4358)

[Abri Hoffman]

Terven, ek het dieselfde probleem gehad op 'n 105 series Land Cruiser nadat ek OME geinstalleer het. Dit blyk 'n algemene probleem te wees op verskeie voertuie en word patrymaal opgelos deur shims of coil spacers links agter.

Sien die volgende post oor dieselfde probleem op 'n 105 Cruiser met Ironman suspension
http://www.landcruiserclub.co.za/cms/in ... ic&t=29385

En 'n goeie verduideliking deur Hein Burnett van Burnco:

Graham,
Most 4x4's with SFA,coils and panhard rods that I have seen tend to pull left.
The castor and camber may be in or out of spec,but if it is similar on both sides the vehicle may not handle right,but it should not pull to one side.
I have had various different vehicles to different alignment shops and they mostly come back pulling left.This would suggest that it has nothing to do with the cc & a settings.
Something else effects the steering and I have this theory that it must be steering box alignment.
The easiest way to correct this would be to make the Panhard rod adjustable and to move the axle back to it's pre-lift position.
I never got around to doing it myself,but maybe somebody on this forum has tried it and can let us know
Hein.

[G-MAN]

Hi Tervan. My Patrol was dieselfde, fitted adjustable panhards en Bob's your aunty!

[Stefan]

panhard = ??

[G-MAN]

Die ronde dik yster wat van jou diff skuins na bo loop.

[Gerrit Loubser]

As G-Man indicated, the Panhard rod is a lateral link attached to the axle on one end and to the chassis at the other.

It has the function of locating the axle laterally and is named after the French Panhard car company, the inventors of the concept.

Panhard rods are often found on coil sprung vehicles with beam axles, because the coils have negligible lateral stiffness and the Panhard rod is a simple way of locating the axle laterally.

Leaf springs have sufficient lateral stiffness to locate the axle without additional linkages, but some leaf sprung vehicles still use Panhard rods to laterally locate the rear axle more positively in the interest of handling precision.

Because the Panhard rod swings through an arc with axle travel, it induces slight lateral axle motion, which can have a slight steering effect. This effect can be minimized at the design stage by arranging the layout such that the length of the Panhard is maximized and that it is horizontal at the mid ride axle position.

[Stefan]

Thanks so much!

[Terven]

Baie dankie vir die raad,lyk my ek sal moet "Pannard rods" insit.Waar sal ek so dit kry?Is daar verskillende make en watter soort sal die beste wees vir die beste prys?
Dankie
Terven

[Abri Hoffman]

Gerhard, waar het jy die adjustable panhard gekoop en hoeveel kos dit?

[Freakazoid]

The panhard must be parrallel to the steering arm through the entire suspension cycle otherwise you get bump steer. The panhard should also be exactly equal in length to the steering arm so that when the suspension cycles their is no angle change between the 2 arms and they stay parallel. Unfortunately it is almost impossible to make them equal length hence they are made to work best at design height. When lifting the vehicle the angles change and the steering is affectd. It either gets loose or tight, generally ti seems tog et loose which is what makes the vehicle wander. Most of the time it wanders to the elft as our roads camber to the left. Add to this that you castor has changed, even though you have castor correction, and the thing feels like it is joining the SACP.

get an adjustable panhard or steering arm and get it set up properly. Abri can tell you how much castor can affect your handling as he can feel it in his vehicle since he can vary his ride height. I believe a bit of extra toe-in can also help, but this might come at the expense of tire wear.