Chevrolet 1977 light duty truck, Service Manual

Page: 249 / 861

Fig. 3B 80 Removing Sector Drive Shaft
remove the steering shaft upp er bearing inner race
a n d seat. Pry off the lower b earin g retainer clip and
rem ove the bearing reinforcem ent, bearing and
b earin g a d a p te r assembly from the lower end of the
m ast jacket.
8.
Remove the upper b earin g housing pivot pins
using Tool J - 2 1854-1 (fig. 3B-77).
9. Install the tilt release lever and disengage the
lock shoes. R em ove the bearing housing by pulling
upw ard to extend the rack full down, and then moving
the housing to the left to disengage the ignition switch
rack from the actuator rod.
10. Remove the steering sh aft assembly from the
u pp er end o f the column.
11. Disassemble the steering shaft by removing the
centering spheres and the anti-lash spring.
12. Rem ove the transm ission indicator wire, if so
equipped.
13. R em ove the fo u r s teerin g sh a ft b e a rin g
housing support to gearshift housing screws and remove
the b earin g housing support. Remove the ignition switch
actuator rod.
14. Rem ove the shift tube retaining ring with a
screwdriver an d then remove the thrust washer.
15. Install Tool J-23072 into the lock plate, m aking
sure that the tool screws have good thread engagem ent
in the lock plate. Then, turning the center screw
clockwise, force the shift tube from the housing (fig. 3B-
78). Remove the shift tube (transmission control lock
tube on floor shift models) from the lower end o f the
mast jacket. Remove Tool J-23072.
CAUTION: When rem oving the shift tube, be
sure to guide the lower end through the slotted
opening in the mast jacket. I f the tube is
allowed to interfere with the ja c k e t in any way,
dam age to the tube and ja cket could result.
16. Rem ove the bearing housing support lock plate
by sliding it out o f the jacket notches, tipping it down
toward the housing hub at the 12 o ’clock position and
sliding it u nder the jacket opening. Remove the wave
washer.
17. All Columns - Remove the shift lever housing
from the mast jacket (transmission control lock tube
housing on floor shift models). Remove the shift lever
spring by winding the spring up with pliers and pulling
it out. On floor shift models, remove the spring plunger.
18. Disassemble the bearing housing as follows:
a. Remove the tilt lever opening shield.
b. Remove the lock bolt spring by rem oving the
retain in g screw and moving the spring clockwise to
remove it from the bolt (fig. 3B-79).
c. Remove the snap ring from the sector drive
shaft. With a small punch, lightly tap the drive shaft
from the sector (fig. 3B-80). Remove the drive shaft,
sector and lock bolt. Remove the rack and rack spring.
d. Remove the tilt release lever pin with a punch
and ham m er. Remove the lever and release lever spring.
To relieve the load on the release lever, hold the shoes
inward and wedge a block between the top o f the shoes
(over slots) and bearing housing.
e. Remove the lock shoe retaining pin with a
punch and h am m er. Remove the lock shoes and lock
shoe springs.
NOTE: With the tilt lever o p ening on the left side
and shoes facing up, the four slot shoe is on the
left.
f. Remove the bearings from the bearing
housing only if they are to be replaced. Remove the
separator and balls from the bearings. Place the housing
on work bench and with a pointed punch against the
back surface o f the race, carefully h a m m e r the race out
o f the housing until a bearing puller can be used. Repeat
for the other race.
Assembly-Tilt Columns
Apply a thin coat o f lithium grease to all friction
surfaces.