Saab 95 1967, Руководство по обслуживанию

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INSPECTION
After considerable mileage, and especially if lubrication
is unsatisfactory, the rack may wear unevenly. If there is
appreciable wear on its cylindrical part, the rack should
be rejected and a new one fitted. Also check the rack
bearing in the steering gear housing, appropriately by
comparison with a new rack. If wear is excessive, the
bushing which is pressed into the housing can be changed.
Examine the teeth of both the rack and the pinion for
wear. All the teeth do not get worn uniformly, and those
which are in mesh when the car is driven straight ahead
will be worn the most. However, if lubrication is satisfac-
tory there will be very little wear even on the most af-
fected teeth.
If the rack teeth are abnormally worn the function of the
steering gear will deteriorate and adjustment becomes
more difficult. In these circumstances a new rack should
be fitted.
Moderate wear on the pinion, on the other hand, may be
corrected by rotating this item through half a turn, so
that the teeth worn the most will be farthest away from
the rack when the car is being driven straight ahead. Nev~
ertheless, the provision of a new pinion is advocated.
Check the outer and inner tie-rod ball joints. The outer
ones are self-adjusting for moderate amounts of wear,
but if free play has developed the entire ball joint must
be rejected and a new one fitted. The components of the
inner ball joints are subjected to but little wear if lubri-
cation is satisfactory. However, if noticeable wear has oc-
curred, the affected parts should be changed.
ADJUSTMENT
The following adjustments may be necessary:
1. Pinion axial play.
2. Rack radial play.
3. Tie-rod inner ball joints.
Adjustment number 3 necessitates removal of the steering
gear, but the other adjustments can be done quite simply
in the car, unless removal of the steering gear is neces-
sary for some other reason. The inner ball joint very sel-
darn requires adjustment, since there is very little wear
here and the ball joint is to some extent selfadjusting.
Adjustment of pinion axial play
The occurrence of noise, knocking, etc, in the steering
mechanism indicates the advisability of examining the
pinion for axial and radial play.
Excessive play may occur after a new part has been fitted
or as the result of wear. Normally, wear is very slight
and adjustment on this account is very seldom called for,
provided that lubrication is satisfactory.
play in the pinion (the column) can be
erting shims under the pinion cover. The
he pinion and the cover should be
Excessive axial
corrected by ins
clearance between t
‘n. (0.12 mm). .
3.03:;er out the adjustment, which can be done with.
out removing the steering gear, jack up the front pan
of the car so that both wheels are clear of the floor.
2 Back off the lock nut, and retard the adjusting screw
for rack radial play enough to completely relax the
spring tension. . _
Back off the two cover bolts at the pinion end.
ave the cover, together with the shims located
9°
4. Rem
under it. . . ,
The shim combination thickness is obtained by mea-
suring in the following way:
a. Refit the flat washer and the cover without shims,
Do not tighten the cover hard so that the cover is
deformed.
b. Measure the play between housing and cover With
a feeler gange.
MEASURING
THE PLAY
c. The obtained value shall be increased so that there
is play max. 0.005 in. (0.12 mm) between cover
and pinion.
Example:
Value obtained when
measuring with feeler
gauge 0.028 in. (0.70 mm)
“av . +0.0028 in. (+0.07 mm)
Total shim thickness 0.031 in. (0.77 mm)
The thims are measured with the aid of a micro-
meter. Shims are available in the following thick-
nesses: 0.0276 in. (0.07 mm), 0.004 in. (0.10 mm).
0.010 in. (0.3 mm) and 0.028 in. (0.7 mm)-
642—6 “E