Chevrolet 70 1969 Series, Руководство по ремонту

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C AB A N D BO DY M O U N T IN G S 1-5
Figure 4 — Wiper Motor and Linkage Layout (Conv. Cab Models)
BLADE ANGLE ADJUSTMENT
(TILT CAB MODELS)
To change angle of wiper blade on arm, loosen
cap screw (fig. 7) which attaches blade to arm.
Rotate blade to new position against adjustment
washer on arm, then tighten cap screw firmly.
IM P O R T A N T : D O N O T A T T E M P T T O
M A N U A L L Y M O V E W IP E R A R M S AS
D A M A G E T O L IN K A G E O R M O T O R M A Y
O C C U R .
WIPER UNIT OPERATION
Two switches, a low-high control switch on
dash and a parking switch within wiper unit, con­
trol the starting and stopping of wiper. Parking
switch contacts, located on a terminal board at
bottom of drive unit, are actually connected across
the dash switch and act as a set of holding con­
tacts when the dash switch is turned off. This
keeps the wiper circuit closed so wiper can keep
operating until the blades reach their predeter­
mined “ P A R K ” position.
P A R K IN G CIRCUIT
When wiper is turned off, circuit is broken at
the dash switch. However, current from battery
continues to flow through motor, through the park­
ing switch contacts to ground. When wiper blades
reach " P A R K ” position at the inboard end of
wiper pattern, the parking switch contacts open,
stopping the motor.
Low Speed Operation (Refer to Figs. 8 and 9)
When the dash switch(s) is placed in “ L O W ”
speed position, current from the battery flows
Ground Strap
Mounting Bracket
Crank Arm
Crank Arm Nut
Shaft Housing
Assembly
Thrust
W asher
Retaining
Ring
Transmission
Shaft Assembly
DRIVE LINKAG E DISASSEMBLED
Retaining Ring
Transmission
Shaft Assem bly | Shaft Housing
Assem bly
Mounting
Bracket
Connecting
Link
I \
Motor Assem bly
DRIVE UNIT A N D M O T O R ASSEMBLED
Figure 5— Wiper Motor and Drive Components (Tilt Cab Models)
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L