GMC 4000 Series Service Manual page 492

STEERING COLUMN A N D SHAFT
("P" MODELS)
REMOVAL (Refer to Fig. 16)
1. Disconnect directional signal wiring from
multiple connector (22) under dash.
2. Remove steering wheel as describedprevi-
ously under "Steering Wheel Replacement."
3. Mark lower shaft slip yoke clamp (20), and
steering gear worm shaft (21) to insure installation
in same relative position.
4. Remove clamp bolt from lower steering
shaft clamp, at steering gear worm shaft.
5. Remove the two upper and lower steering
column clamps (14).
NOTE: On so m e m o d els su ffic ien t cle a r a n c e
may exist at top of column to remove column and
shaft by pulling straight up until bottom of shaft
clears floor board. On other models it may be
necessary to remove bolts and spacers holding
parking brake to dash bracket. Column can then
be readily removed by pivoting sideways and pull­
ing up through floor board.
6. Pry rubber seal loose at floor board and
slide it up on steering column.
7. Pry or pull yoke clamp (20) from steering
gear worm shaft. Remove steering column assem ­
bly from vehicle.
DISASSEMBLY
1. Remove snap ring (5) from groove of upper
steering shaft (2), and pull shaft from steering
column.
2. Lift bearing (4) from switch assembly (6).
Remove directional control lever from directional
switch assembly. Remove the three special screw s
(7) which retain directional and hazard warning
switch (6) to housing (1). At side of steering column,
remove four screw s and cover (23) which retain
harness to column. Lift switch support (3), and
harness assembly from column and housing.
3. Remove directional switch housing (1) by
turning counterclockwise off steering column.
4. Pull, or pry lower bearing (15) from steer­
ing column.
5. Remove stop clamp bolt, and remove stop
clamp (17), and spring (16) from upper steering
shaft.
6. Referring to figure 13, to separate upper
and lower shaft assembly, remove two inner snap
rings (2) from bushings (1). Tap yoke sideways to
dislodge bushings of adjoining yoke. Repeat oper­
ation until all bushings are removed. Remove cork
seals (3) from journal (4) and discard.
7. Referring to figure 13, to remove slip yoke
(6) from lower shaft assembly (9) bend tabs of dust
shield (8) away from retainer groove. Pull shaft
(9), with dust shield (8), washer (5) and felt seal
(7) from yoke sleeve.
G M C S E R V I C E M A N U A L
INSPECTION
place or repair as described previously in "In­
spection" of this section.
ASSEMBLY
ing column.
housing (1) to steering column. Align slots in base
of housing with locking tabs of steering column,
twist housing clockwise to lock.
and hazard switch (6) and bearing (4) together. In­
sert unit in housing (1) with hazard warning lever
through hole in housing and with wiring harness
through cut-out portion of mounting base plate.
Secure all parts to housing with the three special
screw s (7) provided.
groove of steering column. Place tape over harness
at edge of steering column to prevent chafing of
w ires. Secure cover (23) to column, over harness
with four screw s, using care not to pinch wires.
using single screw. Tighten firmly.
shaft, position tabbed dust cap (8), metal washer
(5) and new felt seal (7) on splined yoke shaft (9).
Lubricate splines lightly. Align arrows on yoke
shaft (9), and slip yoke tube (6). Slide shaft into
tube and crimp tabs of dust cap into groove in yoke
tube.
cross (4) of lower shaft yoke in upper shaft yoke.
Install all new cork washers (3), yoke bushings (1),
and snap rings (2). Tap or p ress bushings in yokes
until snap rings can be installed.
shaft yoke, using new cork seal (10), bushing (11),
and snap ring (12) if joint was previously disassem ­
bled.
end of upper shaft (2).
lower steering column bearing (15), push shaft up­
ward through column until it passes upper direc­
tional housing (1). Place upper column bearing (4)
over shaft and in recess of directional switch (6),
if not previously done.
shaft (2) and push downward until seated in re­
cessed groove of steering shaft.
INSTALLATION
steering shaft, and steering column floor seal in
vehicle.
MECHANICAL STEERING
Inspect steering column components and re­
1. Insert bearing (15) into lower end of steer­
2. Install upper directional and hazard warning
3. Assem ble switch support (3), directional
4. Align harness as it leaves housing in formed
5. Fasten directional control lever to switch
6. Referring to figure 13, at lower steering
7. Referring to figure 13, position center
8. Assem ble lower clamp yoke (15), to lower
9. Slide stop clamp (17), and spring (16) over
10. Insert upper and lower shaft assembly into
11. Slide snap ring (5) over end of steering
1. Position steering column, upper and lower
2. Place lower yoke clamp (20) on steering
Sec. 9A
Page 481