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this means that the unit is okeh but the spring is at fault and will have to be replaced. If not possible to adjust to proper heights with the checking tool in place, it indicates that the knee unit will have to be replaced.
Knee Action Spring Checking Tool
Installation of Knee-Action Checking Fixture
Clean out dirt and burrs from around the king pin holes and the
two Master holes in the frame side rail. Remove the dust cap and
lock ring from the top of king pin support. Bolt the right hand
bracket of the fixture loosely to the tie bar. Place the tie bar
and right hand bracket in
Fig. 180— Knee Action Checking Fixture
position between the tie rod and the king pin support, supporting
the end of the tie bar on the steering connecting rod. Fig. 180.
In case the fixture does not fit the holes in the frame, use the
offset adapter furnished with the fixture.
85
Attach the right hand braoket to the frame with the straight locating
pin in the front hole and the tapered pin in the rear hole. Attach
the left hand bracket loosely to the tie bar, raise to position
and attach to frame with straight pin in the front hole and tapered
pin in the rear hole. Tighten bracket to tie bar bolts on each
side. The fixture is now rigidly fastened to the frame.
Checking Spindle Camber
Place the king pin extension clamp back of the king pin support
yoke. Set in position by backing off the lower jaw with the knurled
nut until both upper and lower jaws pass freely over and into the
king pin support yoke bosses. Tighten knurled nut to lock the king
pin extension firmly to yoke.
Install the spindle gauge arm in place on the king pin extension
with the gauge pad resting on the inner cone seat of the spindle.
Fit the spindle camber gauge over end of the spindle. Rotate spindle
camber gauge, which should make contact at some point with the
spindle gauge arm pad. Fig. 181. Contact of gauge to the pad indicates
that spindle camber is O. K.
Fig. 181— Spindle Camber Check
If the gauge does not contact pad, or will not pass below it, it
indicates a bent spindle and the knee unit must be replaced.
NOTE— Perhaps the spindle camber may be off on high mileage
cars due to worn king pin bearings —if so the bearings should
be replaced.
Checking King Pin Caster
Place the caster angle gauge over the king pin extension. Turn
the gauge arm towards the rear of the car. The knife edge face
of the gauge should contact all along the surface of the fixture
plate. Fig. 182. If it does, the king pin caster is O. K.
