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FAMILY
325
Fig. 536 • Sectional view of steering gear across roller shaft
and pitman arm.
1. Roller. - 2-3. Roller shaft adjusting screw and nut .• 4. Oil filler
plug.• 5. Worm.• 6. Roller shaft bushings. - 7. Oil seal. - 8. Pitman
arm. - 9. Pitman arm nut. - 10. Nut colter pin.
Install the roller shaft and fit the upper cover
along with the adjusting screw and shim.
Check clearance between worm and roller: work
on adjusting screw (2, fig. 536) so as to take up
all clearance. Next turn the screw lock nut (3) all the
way in.
Adjustment should be made when the roller is
meshed well at center with the worm.
In case the worm and roller turn out to be meshed
incorrectly. action should be made on ring shims
(II) and plate shims (9, fig. 535) for worm bearing
adjustment, so to
align
the worm centrally to the
roller.
Next again adjust lash between worm and roller
and fit the roller shaft seal and the worm seal.
5
6
7
I
The roller shaft diameter is 1.1295" to 1.1287"
(28.690 to 28.669 rom).
Check the worm for misalignment: the worm out-
ot-true limit is .002" (0.05 rom).
Both roller bearings should not feel rough on
spinning or show play at races.
Examine gaskets at worm and roller shaft for first
class condition.
Renew any damaged parts.
Fig. 535 - Sectional view of steering gear at worm-to-roller
shaft meshing plane.
1. Steering housing. - 2. Wormshaft. - 3. Oil seal. - 4. Upper roller
bearing.• 5. Worm. - 6. Roller shaft. - 7. Roller. - 8. lower bearing. -
9. Lower bearing shims. -10. Thrust cover. -11. Upper bearing shims.
Assembly.
Fit ring shims and worm upper roller bearing
cup; the number of ring shims should be the same
as
counted on disassembly,
if
roller and worm
meshed perfectly at center.
Position roller bearing cones on worm.
Install; the worm and lower bearing cup, then
the thrust cover. setting plate shims between cover
and housing.
Plate shims for service come in the thicknesses
of .0039" and .0059" (0.10 and 0.15 mm).
Check clearance of worm bearings: reduce thick-
ness of shim pack if clearance is excessive and in-
crease thickness if clearance is too little.
Fig. 537 • Detail of idler arm and support.
1. Idler arm and support. - 2. Drag link.• 3. Left side tie rod .• 4. Right
side tie rod.• 5. Tie rod clamps. - 6. lubrication fitting.
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