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STEERING SYSTEM
165
- diScoIUlect the pitman arm;
-
back out the screws (8, fig. 278) which retain
the shim
(7);
- turn the eccentric bushing (6) through the
shim so to move the sector in toward the worm.
Bushing rotation should be of such an extent as
the fixing screws can enter subsequent holes in
the shim.
Should the shim screws be already engaged in
the last hole of the shim, remove the screws, slide
off the shim from the bushing and replace the shim
one serration on, then secure it.
If
too much play is felt at worm bearings, take
up screwing the lower adjuster nut (6, fig. 280)
in; after adjustment, lock the nut in position with
a cotter pin: to this purpose, see that the hole on
steering housing is in line with one of the spaces
between nut castellations.
The sector and worm teeth should mesh perfectly
at center; if not so, move the sector back or forth,
as required, by adding or removing shims (6,
fig.
278) under the thrust washer
(4)
and against
the shoulder of the eccentric bushing.
Shims are supplied
in
the .0039" (0.10
rom)
thickness.
Fig. 271 • Adjusting worm bearings.
1. Wrench A. 57003 for bearing adjuster nut. • 2. Worm.
Back out the bearing lock and adjusting nut (5,
fig. 280).
Slide off the worm (I,
fig. 280)
complete with
roller bearing cones (3).
Tap out roller bearing cups with driver A. 74046
and the oil seal (2,
fig.
280) with driver A.74017.
Inspection and Adjustment.
Check parts accurately and see
that
the sector
and worm contact faces show no sign of seizure,
indents or deep scoring.
Check clearance between eccentric bushing (6.
fig. 278) and sector shaft.
The wear limit is set at .004" (0.10 rom) and
clearance of new parts should be .0000" to .0016"
(0 to 0.042 mm).
It is good practice to inspect the worm for mesh-
ing
at center: maximum out-or-true limit is .002"
(0.05
rom).
NOTE·
Steering worm and sector are assembled
with
a
touch fit at tooth flank.
Adjustment is made by rotating the eccentric bush·
ing mounting the worm sector.
I~I~
'-
0_
S /
/ '
6/
9
18
17
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t6
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IS
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II
To adjust the steering gear after overhaul or
just as a routine job on car, proceed as follows.
If
the lash between worm and sector turns out
to be excessive, work on the wonnshaft bushing
as outlined hereafter:
Fig. 278 • Sectional view of the steering gear at sector.
1.
Sector adjusting screw. - 2. Lock nut. - 3. Plain washer. - 4. Thrust
washer. - 5. Shims. - 6. Eccentric bushing. - 7. Bushing shim. -
B. Shim screws. - 9. Seal cover. ·10. Pitman arm. - 11. Oil seal. •
12. Shim packing. - 13. Upper oil seal. - 14. Steering housing. -
15. Washer (4) location dowel. - 16. Worm.· 17. Cover. - lB. Oil
filler plug.
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