Installation Instructions

6 FRONT AXLE
B1700·B21 00·B2400 WSM, 11770
[2] FRONT WHEEL ALIGNMENT
To assure smooth mobility or maneuverability and
enhance
stable and straight running, the front
wheels are mounted at an angle to the right, left and
forward directions.
This arrangement is referred to
as the Front Wheel Alignment.
[Camber]
[Kingpin Angle]
//i
a
C045F051
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The front wheels are tilted from the vertical as
viewed from the front, upper wheels are spreader
than
lower ones.
This inclination
is called camber (a). Camber
reduces
bending or twisting of the front axle
caused by vertical load or running resistance, and
also maintains
the stability in running.
The kingpin is tilted from the vertical as viewed
from the front.
This angle is called kingpin angle (a). As with the
camber, kingpin angle reduces rolling resistance
of
the wheels, and prevents any shimmy motion of the
steering wheel.
It also reduces steering effort.
Camber 0.035 rad. I I Kin~pin
_____ .L.- 2_o_______ inclination
0.209 rad.
12°
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The kingpin is tilted forward as viewed from the
side. The point (b) of the wheel center line is
behind the point (a) of the kingpin shaft center
line.
This inclination is called caster (c). Caster helps
provide steering stability.
As with the kingpin inclination, caster reduces
steeri ng
effort.
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Viewing the front wheels from above reveals
that the distance between the toes of the front
wheels is smaller than that between the heels.
It is called toe-in. The front wheels tend to roll
outward due
to the camber, but toe-in offsets it
and ensures parallel rolling of the front wheels.
Another purpose
of toe-in is to prevent excessive
and uneven wear oftires.
t
Rear
Front
[Toe-in]
Rear
1-
Front
[Caster]
_
__ Ca_s_te_r_-'- o_ro_~d_· 1 1 __ T_o_e-_in 1_t_o_10_m_m ....J
. 0.04 to 0.39 in.
6-M2