Chevrolet 1977 light duty truck, Руководство по обслуживанию

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FRONT END
W IN D S H IE L D W IPERS
W indshield wiper units on all models are o f the two-
speed electric type. A single w iper motor unit, m ounted
to dash panel at top and to left o f engine cover inside
cab, powers both wiper blades. The wiper blade
o p e ra tin g link rods and pivot m ountings on these models
are located in the outside air inlet plenum chamber.
Arm Adjustm ent
To adjust sweep o f blades turn on wipers, then note
sweep o f arms. If necessary, remove one or both arms as
follows: Pull outer end o f a rm away from glass which
will trip lock spring at base o f arm and release spring
from u n d ercu t o f pivot shaft. W hile holding arm in this
position, pull outw ard on cap section at base o f arm to
rem ove arm. A rm can be reinstalled in any one o f
several positions due to serrations on pivot shaft and in
a rm cap. See figure 2D-95.
W IP E R A R M P IVO T SH A FTS A N D LINK
R O D — FIG. 2D-96
Removal
1. Rem ove windshield wiper arms from pivot
shafts. Procedure for rem oving arms is explained
previously und er "A rm A djustm ents."
2. Remove screws which attach outside air cowl
v entilator grille to cowl. C arefully remove grille from
cowl.
3. At center o f cowl, remove two attaching nuts
which attach link rod to m otor drive. Disengage link
rods from pins.
4. R em ove screws which attach each arm transm is­
sion pivot shaft assembly to cowl. Remove pivot shaft
assembly with link rod from plenum cham ber.
Installation
1. Place pivot shaft assembly with link rod into
position at cowl bracket. Secure assembly to bracket with
two screws.
2. Attach end o f link rod to motor drive and arm.
Secure rod with the two attaching nuts.
3. Install outside air cowl ventilator grille to top o f
cowl.
4. Before installing wiper arms, operate wiper
m otor m om entarily which should rotate pivot shafts to
park position. Install arms.
COWL V E N T IL A T O R GRILLE
Replacement
1. Remove windshield wiper blades.
2. Remove screws retaining grille, figure 2D-97.
3. Remove grille and seal.
4. Reverse above steps to install grille.
Fig. 2D-96--W indshield W iper Linkage