Cadillac 60 Series 1963 Shop Manual page 65

5-6
POWER STEERING
the seals seat themselves and the ball bearings
polish the rack-piston and worm shaft grooves
sufficiently to meet the service specifications.
4. If pitman shaft end play is not within limits,
it should be adjusted so that on-center preload
is 16-18 ounces more than the 1/2 turn off-center
load but still not more than 36 ounces. Adjust
on car by loosening lock nut and turning adjusting
screw as required. Recheck pull after tightening
locknut.
5. Check for rough spots in pitman shaft sector
and power piston rack by turning wheel between
1/4 turn to the left and 1/4 turn to the right. A
visual inspection of gear teeth will reveal neces-
sary correction, if rough spots are found. Re-
member, however, teeth are not absolutely smooth
but are machined to hold lubricant.
6. When steering gear adjustments are com-
pleted, remove spring scale, connect pitman arm
to drag link, and tighten drag link nut to 40 foot-
pounds.
5. Drag Link Height Adjustment
Drag link height and parallelism should be
checked in cases of steering wander and instabili-
ty after normal correcting adjustments such as
standing height, front wheel alignment, etc., have
been made. Check drag link height by measuring
distance between lower edge of drag link, just
inboard of tie rod inner pivots, and center line of
lower control arm inner pivot bolts. The pro-
cedure outlined below may be used to measure
these distances:
1. Position car on wheel alignment machine
and place a straight bar across two adjustable
jacks below the drag link, midway between drag
link and lower control arm.
2. Adjust height of jacks so that distance " A "
(from top of bar to centerline of lower control
arm inner pivot bolts) is equal on both sides,
Fig. 5-8. Adjusting jacks so that this distance is
an even number of inches will simplify this mea-
surement.
NOTE: Use a combination square as shown
in Fig. 5-8, when measuring this distance,
making certain that bubble is centered in level.
3. Measure distance " B " (from top of bar to
lower edge of drag link) on both sides, using com-
bination square as shown in Fig. 5-9, making
certain that bubble is centered in level. Do not
reposition bar or move car to make this mea-
surement.
4. Distance " A " minus distance " B " should
be 2-15/16 inches plus or minus 1/16 inch for
proper drag link height and equal at both inner
pivot points within 1/16 inch for proper par-
allelism.
5. If idler arm end of drag link is not within
limits, loosen idler arm support mounting screws
on frame side bar and move arm support to obtain
proper height. If proper height cannot be obtained,
remove idler arm from car and bend arm slightly
as required.
CAUTION: Use an arbor press to bend idler
arm, being careful not to exert pressure on
pivot housing, as pivot bushing may become
damaged. The bending operation must be done
very carefully to avoid internal stresses and
must be performed cold. Do not attempt to bend
idler arm while it is on car, as this will damage
pivot bushing.
6. If pitman arm end of drag link is not within
limits, loosen steering gear mounting bolts and
move gear to obtain proper height. If proper
height cannot be obtained, remove pitman arm
and bend as required.
Fig. 5-8 Drag Link to Frame Parallelism