The standard windshield wiper available on S-
Series Trucks is the electric cowl mounted dual wiper
system shown in Fig. 1. Except for the control switch,
which is mounted on the instrument panel, all service on
the wiper system is performed at front of cab.
When control switch is turned to "LO" or "HI"
wiper speed is controlled accordingly. When control
switch is turned off, wiper blades move automatically to
"park" position on wind- shield (50 mm or 2 inches up
from bottom of windshield). Reciprocating action of
wiper arms results from rotation of drive lever on wiper
Do not attempt to move wiper blades
through their arc by grasping wiper arm.
This action can damage motor internal
parts or bend wiper linkage. Also, if
blades are frozen to wind- shield, do not
operate control switch until blades have
Remove windshield washer hose from fittings on
top of cowl.
Remove wiper blades and arms (Fig. 2).
Remove seven mounting screws and detach
cowl cover panel from top of cowl (Fig. 3).
Fig. 2. Removing Wiper Arms
Fig. 3. Removing Cowl Cover Panel
Panel, Cowl Cover
Chamber, Air Intake
CTS-4061 - Chapter I
PRINTED IN UNITED STATES OF AMERICA