Sunbeam ALPINE I SERIES: APLINE II SERIES, Руководство по ремонту, Страница: 175 / 413

WSM.124
Section F (Front Suspension)
CASTOR ANGLE READINGS
Vehicle loaded on to gap gauges
The designed castor angle given in the "General
Data Section" can only be obtained by loading the
vehicle down to the static laden condition, front
and rear. A considerable weight is needed to do
this which makes this method of checking the castor
angle too difficult to use in Service Repair Shop.
To overcome this difficulty the gap gauges Illus­
trated In Figs. 2 and 3 are used and these require
only a reasonable amount of weight for loading
down purposes.
With the vehicle loaded onto gap gauges the follow­
ing castor angles should be obtained:
Alpine
+
3 ° 10' (3t
0
)
Rapier
+
0
°
25' (approx. f
0
)
This figure differs from that given In the Data
Section because of the higher rear end condition
obtained when the car Is loaded onto the gap gauges.
CASTOR ANGLE
To check, using Churchill camber gauge (see
Fig. 12).
Jack up the front of the car (using a block of wood
between the Jack and the front crossmember).
Check wheels for "run-out" and position with
maximum "run-out" in the horizontal as described
In "To Check and Re-set Wheel Camber".
Place turntables under each front wheel and wood
packing of the same height as the turntables under
each rear wheel, to keep the vehicle level.
· Remove the locking pins, one from each turntable.
The wheels must be in the straight ahead position.
Slide the turntable scales (degrees of turn) round
so that the "zero" Is In line with the pointer and
lock the scales (see Fig. 12).
Apply the Castor, Camber, Steering Axis Inclinat­
ion Checking Gauge (Churchlll 121 L and U Is Illus­
trated) to the wall of the tyre of the left-hand front
wheel, making sure that the contact points of
2nd
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the gauge to the tyre are clear of the normal
bulge of the tyre, above the contact area of
tyre to ground.
Turn the scale of the gauge on its pillar so that it is
parallel with the road wheel and set the spirit level
slide to the mid-way position on the castor and
steering axis scale.
Set the gauge vertically on the road wheel by
moving the top of the plllar backwards or forwards
until the air bubble is central between the hair lines
on the spirit level.
Turn the scales at right angles to the road wheel
with the scale to the front of the pillar of the gauge
(to front of the pillar in relation to the car). In
this position the gauge will measure the outward
"tilt" of the stub axle on each 20 °
lock.
Turn the road wheels to 20
°
in the left-hand lock.
Move the spirit level slide until the air bubble is
central between the hair lines on the spirit level.
Take the reading shown on the Castor and Steering
Axis Inclination scale:
Turn the road wheels to 20 ° in the right-hand lock.
Move the spirit level slide until the air bubble is
central between the hair lines on the spirit level.
Take the reading shown on the Castor and Steering
·Axis Inclination scale.
Deduct the first (left lock) reading from the second
(right lock) reading to obtain the castor angle in
degrees.
The gauge must now be transferred to the right­
hand front wheel and set up vertically as previously
described with wheels in the straight ahead
position (turntable scales reading "zero").
The cast.or angle check is carried out on the right­
hand side in exactly the same way as described for
the left-hand side. Turn the scale at right angles to
the road wheel and to the front of the plllar of the
gauge. First take the left lock reading and then
the right lock reading and deduct the first reading
from the second reading.