Chevrolet Light Duty Truck 1973, Service Manual

Page: 803 / 979

STEERIN G 9 -3 7
cylinder into abutment of cylinder and sector. Hold
an .070” drill between the lock bezel and housing.
Rotate the cylinder counterclockwise, maintaining a
light pressure until the drive section of the cylinder
mates with the sector. Push in until the snap ring
pops into the grooves and the lock cylinder is
secured in the housing. Remove the .070” drill.
Check lock cylinder for freedom of rotation.
2. Install the Direction Signal Switch and Steering
Wheel as outlined previously in this section.
IGNITION SWITCH (C AND K SERIES)
The ignition switch is mounted on top of the column
jacket near the front of the dash. For anti-theft reasons,
the switch is located inside the channel section of the
brake pedal support and is completely inaccessible
without first lowering the steering column (see steering
column removal).
The switch is actuated by a rod and rack assembly. A
portion of the rack is toothed and engages a gear on the
SWITCH IN LOCK POSITION
Fig. 5 9 —Ignition Switch Assembly
end of the lock cylinder, thus enabling the rod and rack
to be moved axially (with respect to the column) to
actuate the switch when the lock cylinder is rotated.
Removal
1. Lower the steering column as outlined under
“Steering Column Removal” later in this section. It
is not necessary to remove the steering wheel.
CAUTION:
I f the steering column is not
removed from the vehicle, be sure that it is
properly supported, before proceeding.
2. The switch should be positioned in “Lock” position
before removing. If the lock cylinder has already
been removed, the actuating rod to the switch
should be pulled up until there is a definite stop,
then moved down one detent, which is the “Lock”
position.
3. Remove the two switch screws and remove the
switch assembly.
Installation
1. Before replacing the switch, be sure that the lock is
in the “Lock” position. Make certain that the switch
is in “Lock“ position (fig. 59); if it is not, a
screwdriver (placed in the locking rod slot) can be
used to move the switch to “Lock”.
2. Install the activating rod into the switch and
assemble the switch on the column; tighten the
mounting screws.
CAUTION:
Use only the specified screws since
over-length screws could prevent a portion of
the assembly from compressing under impact.
3. Reinstall the steering column assembly following
the “Mandatory Installation Sequence” outlined
later in this section.
STEERING COLUMN
All models which are equipped with the Function
Locking Energy Absorbing Steering Columns are one of
five basic designs.
1. Synchromesh
— The synchromesh column is used
on models with the standard transmission and
column mounted shift levers. The shift tube, within
the outer column jacket, includes two lower shift
levers for connection to the transmission control
linkage. This column does not lock the transmission
when the lock cylinder is in the "lock" position.
2.
Floor Shift
— This column is used on models
equipped with a manual transmission with the shift
lever on the floor. This column does not lock the
transmission when the lock cylinder is in the "lock"
position.
3.
Automatic Column Shift—
this column is used on all
models with an automatic transmission and a
standard column. This column has a single lower
shift lever for shifting the automatic transmission.
LIGHT DUTY TRUCK SERVICE MANUAL