Chevrolet 10 Series 1967, Service Manual

Page: 201 / 605

REAR SUSPENSION AND DRIVE LINE 4-43
SHIFTER SPRING
Replacement
1. Follow instructions given in Steps 1, 2, 3, 4 under
"Vacuum Cylinder Diaphragm Replacement."
2. Remove the piston rod from the housing.
3. Push in on end of piston rod to relieve spring load
and remove snap ring from inside of piston rod. Pull
push rod assembly out of piston rod.
4. Place head of push rod bolt in bench vise and remove
two nuts, short spacer, stop washer, spring, long
spacer, and stop washer from push rod bolt.
5. Install stop washer, long spacer, new spring, stop
washer and short spacer.
6
. Install adjusting nut on push rod and tighten until
distance between outer faces of stop washers is
2-13/16" (fig. 85).
7. Install lock nut on push rod and tighten, being careful
not to change the 2-13/16" adjustment.
8
. Lubricate inside of piston rod with engine oil and
install push rod assembly.
9. Push in on push rod to compress spring and install
snap ring.
10. Install push rod assembly in the housing.
11. Complete the assembly of the vacuum cylinder ac­
cording to instructions given in Steps 5,
6
, 7,
8
, 9
under "Vacuum Cylinder Diaphragm Replacement."
VACUUM SHIFT UNIT CONTROL
SWITCH REPLACEMENT
The manually operated control switch, mounted on the
transmission shift lever (fig.
8 6
) is an electromechanical,
two-position switch which controls the axle vacuum shift
unit and the associated speedometer adapter.
1. Disconnect switch electrical leads at the dash panel
mounted fuse block and speedometer adapter.
2. Remove the two screws securing the axle shift con­
trol valve to the frame side member mounted
bracket.
NOTE:
Do not disconnect control valve vac­
uum, atmosphere or air cleaner lines.
Fig . 8 6 - Shift U nit Control Switch
Fig . 87 - Vacuum Control Shift C ab le Removal
3. Tilt or slide control valve as required to obtain ac­
cess to cable retaining screw and disconnect cable
from valve (fig. 87). Disconnect conduit from valve
assembly and remove all cable retaining clips.
4. Remove the transmission shift lever knob, then re ­
move the two screws retaining switch housing to
transmission shift lever and withdraw cable and
housing assembly from vehicle.
5. Make sure cable shift knob is in down position, then
attach switch housing rubber case on transmission
shift lever so that the distance from top of cable
shift knob to top of transmission shift lever is
2 -1 /4 ". Torque retaining screws to 40 in. lbs.
CHEVROLET TRUCK SERVICE MANUAL