1primary function of caster
improve directional stability and wheel returnability
2excessive + caster
increased steering effort, hard ride, and steering wheel rapidly returns to center after a turn
3excessive - caster
poor steering wheel returnability and reduced directional stability
4axle set back
if theres a caster issue the setback will establish a pivot point that has moved 1/2in
5you can use max steer to
measure center point of rack if rack is damaged you can see a large diffrence of 1 degree or more
6included angle
everything between povit points (strut, knuckle, hub bearing)
7what are you looking for included angle
large side to side diffrence of 1.5 degree or more
8included angle show be within
.5 degree on both sides
9when cradle needs adjusted
it will be the same exact diffrence on both sides ex +3 camber on one side -3 on the other and sai would be +3 and -3
11incorrect thrust angle will change the
center of steering wheel
12what is a center bolt
the bolt that keeps the springs together
13a broken center bolt
can change thrust angle, axle to shift, dog tracking, misalignment of leaf spring,
14contour of the road
can cause a pull
15worn sway bar end links
can cause noise especially when driving over bumps and taking turns
16sai and camber on one side but not the other
can mean something is bent/damaged possibly control arm
17camber and sai out of spec the same amount on both sides
means craddle might need adjustment
18when you move the cradle you are tring to correct
sai and camber
19worn/damaged springs
can change thrust angle
20a sagging or damaged leaf spring
can cause dog tracking
21worn ball joints can change
caster and camber
22a bad wheel bearing
will make a growling noise that increases in pitch with speed
23worn control arm bushing
can change caster and camber
24worn strut bushing can
change caster and camber
25worn strut mounts
can cause a noise and chnage caster and camber and cause a pull
26weak coil spring on 1 side
can make the tire lean changing camber on that side
27weak coil springs in the rear
will change caster
28weak coil springs on the front change
all align angles
29incorrest sai
can cause bump steer
30if cross camber is more than 1/2 degree
itll pull to the most POSTIVE side
31if cross caster is more than 1/2 degree
it eill pull to the LEAST POSITIVE side
32a control valve
dierects presurized fluid into the steering cylinder to asisit steering
33a leaking steering control valve
can cause a pull to one side
34a leaking control valve will
cause a pull to one side due to un even fluid pressure