Chevrolet 10 Series 1968, Service Manual

Page: 75 / 713

BODY IB-8
grille can be readily removed from cowl opening as
follows:
lo Remove windshield wiper arms from wiper pivot
shafts.
2. Raise hood and remove screws, retaining cowl venti­
lator grille and cowl hood ledge seal.
3. Remove four (4) screws from the rear recessed
louvers.
4. Remove the six (6) screws retaining the front of the
grille to the cowl.
5. Remove the two larger size screws from each end of
the grille at the forward corners.
6. Remove one (1) screw each side which is exposed
when the door is opened.
7. Inspect cowl hood ledge seal for fatigue or cuts and
replace if necessary.
8. Secure front edge of grille over lip of hood seal with
six retaining screws.
9. Reinstall windshield wiper arms on pivot shafts.
10. Reverse removal procedure to install.
COWL AIR VENTILATOR VALVE ASSEMBLY
Replacement
Entire outlet valve assembly may be removed from the
vehicle by removing two screws and depress the pins.
Refer to Figure 19. Also refer to Figure 20 for disas­
sembly of the flat face cowl air ventilator assembly.
WINDSHIELD WIPERS
Windshield wiper units on all models are of the two-
speed electric type. A single wiper motor unit, mounted
to center of cowl inside cab, power both wiper blades.
The wiper blade operating link rods and pivot mountings
on these models are located in the outside air inlet
plenum chamber.
F ig . 20 - Cow l V entilator - F /F Cowls
Arm Adjustment
To adjust sweep of blades to provide maximum visibil­
ity, turn on wipers, then note sweep of arms. If neces­
sary, remove one or both arms as follows: Pull outer
end of arm away from glass which will trip lock spring at
base of arm and release spring from undercut of pivot
shaft. While holding arm in this position, pull outward on
cap section at base of arm to remove arm. Arm can be
reinstalled in any one of several positions due to serra­
tions on pivot shaft and in arm cap (fig. 21).
Wiper Arm Pivot Shafts and Link Rod (Fig. 18)
Rem oval
1. Remove windshield wiper arms from pivot shafts.
Procedure for removing arms is explained previ­
ously under "Arm Adjustments."
2. Remove screws which attach outside air cowl venti­
lator grille to cowl. Carefully remove grille forward
from cowl.
3. At center of cowl, remove retainer (fig. 18) which at-
TO INSTALL OR REMOVE
DEPRESS PIN
NOTE) INSTALL CLIP
BETWEEN TABS
ON VALVE ASM
INOTEI INSTALL KNOB UNTIL
THREADS BOTTOM
OUT AND TIGHTEN
F ig . 19 - Side Cowl V entilator
F ig . 21 - W indshield W iper Linkage
INSTRUMENT
PNL. REINF.
CHEVROLET TRUCK SERVICE MANUAL