Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 47 / 468

STEERING 3B-5
1.
Worm Bearing Adjuster 9. Upper Worm Bearing Race 16. Lash Adjuster
L o c kn ut 10. Pitman Shaft Seal 17. Lash Adjuster Shim
2. Worm Bearing Adjuster 11. Housing
18.
Housing Side Cover and
3. Lower Worm Bearing Race
12. Wormshaft Seal Bushing Assembly
4. Lower Ball Bearing
13. Side Cover Gasket 19. Lash Adjuster Lo ck n ut
5.
Lower Bearing Retainer 14. Pitman Shaft Bushing 20. Side Cover Bolts
6. Ball Nu t
(2 Bushings on G 10-30 Series
21. Ball Guide Clamp Screws
7.
Wormshaft
T rucks) 22. Ball Guide Clamp
8.
Upper Ball Bearing
15.
Pitman Shaft
23. Ball Guides
24. Balls
Fig. 3B-1 4 - S t e e r i n g G e a r- E x c e p t Co rve tte
guide hole to the bottom of the other or until stopped by
reaching the end of the worm.
NOTE:
In cases where the balls are stopped by the end
of the worm, hold down those balls already dropped into
the nut with the blunt end of a clean rod or punch (fig.
3B-12) and turn the worm in the reverse direction a few
turns. The filling of the circuit can then be continued.
It may be necessary to work the worm back and forth,
holding the balls down first in one hole and then the
other, to close up the spaces between the balls and fill
the circuit completely and solidly.
6.
Assemble the ball guide clamp to the ball nut and
tighten the screws to specified torque.
Check the assembly by rotating the nut on the worm to
see that it moves freely. D o not rotate the nut to the end of
the worm threads as this may damage the ball guides. If there
is any "stickiness" in the motion of the nut, some slight
damage to the ends of the ball guides or to other gear
components may have been overlooked.
Assembly (Fig. 3B-14 and 3B-15)
A fter a m ajor service overhaul, steering gear lubricant
meeting G M Standard G M 4673M (or equivalent) should be
applied to the pitm an shaft and bearings, wormshaft and
bearings and the ball nut teeth.
1. Place the steering gear housing in a vise with the
wormshaft bore horizontal and the side cover opening up.
2. W ith the pitm an shaft and wormshaft seals, pitm an
shaft bushings and worm shaft bearing races installed, and the
ball nut installed on the wormshaft, proceed to Step 3 or 4.
3.
All Except Corvette--
a. Slip the upper ball bearing over the wormshaft and
insert the worm shaft and nut assembly into the housing,
feeding the end of the shaft through the upper ball bearing
race and seal.
b. Place a ball bearing in the adjuster race and press the
stamped retainer into place with a suitable socket.
c. Install the adjuster and locknut into the lower end of
the housing (being careful to guide the end of the wormshaft
into the bearing) until nearly all end play has been removed
from the wormshaft.
4.
C orvette-
a. Place a worm shaft bearing in the housing race. Slide
the other bearing and the adjuster plug assembly over the
upper end of the wormshaft.