1967 CHEVROLET CAMARO ECU

ELECTRICAL-BODY AND CHASSIS 12-34

5. To replace, reverse the removal procedure.

SPEEDOMETER REPLACEMENT

1.
Remove instrument cluster as previously described

in this section.

2.
Remove clock set shaft knob.

3.
Remove eight screws securing cluster housing to

bezel trim panel. Separate parts carefully observing

stack up of parts.

4.
Remove two screws securing speedometer head to

rear of cluster housing.

NOTE:
Servicing of the speedometer head

should be performed by an authorized AC Speed-

ometer Service Station.

5. To install, reverse the removal procedure..

SPEEDOMETER CABLE

Replacement or Lubricatibn

1.
Disconnect the speedometer cable from the speed-

ometer head. Remove the old cable by pulling it out

from speedometer end of conduit.

NOTE:
If old cable is broken it may be neces-

sary to remove lower piece from transmission

end of conduit.

2.
Lubricate the lower 3/4 of cable with speedometer

cable lubricant and push the cable into the conduit.

Connect the upper end to the speedometer head and

road test vehicle for proper speedometer operation.

INDICATOR LIGHT REPLACEMENT

To replace any indicator or cluster bulb, unsnap the

proper socket from rear of instrument cluster, remove

and replace bulb, and reinsert unit into rear of cluster

housing.

OIL PRESSURE INDICATOR

If the light does not come on when the ignition switch
is turned on, or if the light comes on and remains on

after the engine is started, one or more of the following

conditions is indicated:

• Low oil pressure

• High engine temperature

• Defective wiring or switch

Switch Replacement

1.
Disconnect wiring harness connector from sender

unit terminal (located in block above starter on

L-6 engines and at left front of distributor on V-8

engines).

2.
Remove sender unit, replace with new unit, and

; check operation.

GENERATOR INDICATOR

1.
Ignition on, engine not running and telltale light off.

a. Indicator bulb burned out, replace bulb.

b.
Open circuit or loose connection in the telltale

light circuit.

2.
Telltale light stays on after engine is started.

a. If indicator light does not go out at engine idle

speed, refer to Charging Systems under Engine

Electrical, Section 6Y.

TEMPERATURE (COOLING SYSTEM) INDICATOR

The temperature indicator circuit consists of two re-

motely located units, indicator gauge and engine sender

unit. The indicator gauge on all models uses a single

red light to indicate an overheated engine condition.

Engine Sender Unit Replacement

1.
Drain engine cooling system to a level below unit.

2.
Remove sender unit (located in the inlet manifold

near water pump housing on V-8 engines and in the

cylinder head near an exhaust port on L-6 engines)

and replace with new unit.

3.
Refill cooling system and check operation of unit.

CORVETTE INSTRUMENTS AND GAUGES

INDEX

Page

General Description ., 12-34

Service Operations . 12-35

Instrument Cluster ., 12-35

Fuel Gauge 12-35
Speedometer/Tachometer Service. 12-35

Temperature Gauge 12-35

Ammeter/Oil Pressure Gauges 12-35

GENERAL DESCRIPTION

All Corvette instruments and gauges are conveniently

located in the dash-mounted cluster. The entire cluster

is removable to permit servicing of the various instru-

ments and gauges. The indicator and cluster illuminating

bulbs may be replaced without removing the cluster from

the panel.
Regular maintenance is not required on the instrument

cluster or its components other than maintaining clean

and keeping the speedometer and tachometer cables

properly lubricated.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-35

SERVICE OPERATIONS

INSTRUMENT CLUSTER

REMOVAL AND INSTALLATION (Fig. 49)

1.
Remove mast jacket assembly. Refer to Section 9

for removal procedures.

2.
Disconnect tachometer drive cable at distributor.

3.
Disconnect the headlamp panel control switch from

instrument cluster.

4.
Remove lighting switch as outlined in this section.

10 10-A 1112 13

14
15 16 17 18 19

Fig.
49- Instrument Cluster Connections

1.
Cluster Illuminating

Bulbs

2.
Direction Signal Indicator

Bulb L.H.

3. Direction Signal Indicator

BulbR.H.

4.
Headlamp Actuating Motor

Indicator

5. Headlamp Hi Beam

Indicator

6. Parking Brake Alarm

Indicator

7. Ground Lead Attaching

Point

8. Temperature Indicator
"1"

Terminal
9.

10.

10A.

11.

12.

13.

14.

]5.

16.

17.

18.

19.

20.

21.
Temperature Indicator "S"

Terminal

Ignition Switch Receptacle

ignition Switch Illuminating

Bulb

Oil Pressure Indicator

Tachometer

Lighter Receptacle

Trip Odometer

Wiper Switch Receptacle

Speedometer

Ammeter "Gen" Terminal

Ammeter "Battery" Terminal

Lighting Switch Receptacle

Fuel Gauge
"1"
Terminal

Fuel Gauge "S" Terminal

5. Remove the ignition switch. Refer to Section 6Y

for removal procedure. Then disconnect ignition

switch lamp support at instrument panel.

6. Disconnect oil pressure line at oil pressure gauge

then remove the lead wires from ammeter, wiper

switch and cigarette lighter. Disconnect trip odom-

eter at mast jacket support.

7. Remove the instrument cluster-to-dash retaining

screws and pull cluster assembly slightly forward

to obtain clearance for removal of speedometer

cable, tachometer cable, cluster ground wire, fuel

gauge lead wires and remaining indicator and cluster

illuminating lamps.

8. To install cluster in dash panel, reverse removal

procedure.

FUEL GAUGE

The gasoline fuel gauge circuit consists of an electri-
cal indicator in the instrument cluster and a float-

controlled rheostat in the fuel tank.

Since the fuel gauge consists of two remotely located

units and connecting wires, it is sometimes difficult to

determine which unit is at fault when the gauge fails to

operate properly. Cluster removal is necessary to re-

place the fuel gauge.

NOTE:
Be sure to check gas gauge fuse in fuse

panel before attempting to trouble shoot for

inoperative gauge or tank sending unit.

SPEEDOMETER AND/OR TACHOMETER

Removal and Installation

Cluster must be removed from vehicle to service

speedometer head assembly (see Cluster Removal pro-

cedure)
.
With cluster removed from vehicle:

1.
Remove five screws securing cluster back panel to

cluster assembly; separate the parts carefully.

CAUTION: Care must be used to avoid marring

instrument cluster face.

2.
Remove two screws securing speedometer or ta-

chometer head to cluster back panel; carefully re-

move speedometer or tachometer head.

NOTE:
Servicing of speedometer or tachom-

eter head should be performed by an authorized

AC service station.

3.
Reverse above procedure to install speedometer.

Cable Replacement or Lubrication

1.
Disconnect the. cable from the speedometer or ta-

chometer head. Remove the old cable by pulling it

out from speedometer end of conduit.

NOTE:
If old cable is broken it may be nec-

essary to remove lower piece from transmission

or distributor end of conduit as applicable.

2.
Lubricate the lower 3/4 of cable with
AC
speedom-

eter cable lubricant and push the cable into the con-

duit. Connect the upper end to the speedometer or

tachometer head and road test vehicle for proper

operation.

TEMPERATURE GAUGE

The temperature indicator requires very little service

other than testing for malfunctioning and replacing de-

fective units. Cluster must be removed to service tem-

perature gauge.

Do not attempt to repair either the engine unit or the

gauge. When installing new engine unit, do not use

thread compound on unit threads, as this will increase

electrical resistance of unit and cause faulty reading

on gauge.

AMMETER OR OIL PRESSURE GAUGE

The ammeter or oil pressure gauge requires very

little attention other than keeping ammeter terminals

clean and tight. If the oil pressure control line should

become restricted it should be blown out or replaced.

Cluster must be removed to service these gauges.

HftVKI MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-36

CAMARO INSTRUMENTS AND GAUGES

INDEX

Page

General Description
12-36

Service Operations
12-36

Instrument Cluster
. . . 12-36

Instrument Lamps
12-36

Printed Circuit
12-36

Fuel Gauge
12-37

Tachometer
. . 12-37

Seat Separator Instrument Console
12-37
Page

Fuel Gauge
12-37

Ammeter
12-37

Temperature Gauge
12-37

Oil Pressure Gauge
. 12-37

Fuel Warning Unit
12-37

Clock.
... 12-37

Oil Pressure Indicator
12-37

Generator Indicator
12-38

Temperature Indicator
12-38

GENERAL DESCRIPTION

The standard Camaro instrument cluster assembly con-

sists
of two
circular units which house
the
speedometer

and fuel gauge assemblies.
The oil
pressure, left-hand

directional
and
brake warning indicators
are
located
in

the face
of the
speedometer bezel while generator,
tem-

perature
and
right-hand directional indicators are grouped

with
the
fuel gauge unit.
The
high beam indicator
is

located between
the
cluster bezels.

A special instrumentation package
is
available with
the

eight-cylinder engine
and
center floor console combina-

tion.
The
special cluster includes:
a
clock; coolant

temperature,
oil
pressure, fuel
and
ammeter gauges,

mounted forward
on the
seat separator console;
a ta-

chometer
in the
right circular housing
of the
dash
in-

strument cluster; and
a low
fuel level indicator replacing

the
oil
pressure indicator lamp
in the
instrument cluster.

The instruments
and
gauges,
may be
serviced only

after
the
instrument cluster
is
removed from
the
vehicle.

Indicator
and
cluster lamps except
for the
high beam

indicator
may be
replaced without removing
the
cluster

assembly. Partial cluster removal
is
necessary when

replacing
the
high beam indicator due
to its
proximity
to
the upper brace
rod
anchor plate.
The
bulbs
are in-

stalled
in
plastic sockets which lock into
the
cluster

housing and make contact with
the
printed circuit.

A
low
level fuel warning system
is a
special feature

available with
the
floor console gauge pack. This
sys-

tem includes
an
indicator lamp
in the
dash cluster and
a

semi-conductor unit senses
the
change
in
electrical
re-

sistance
of the
fuel system circuitry
as
variations
in

fuel level occur.
The
sensing device
is
replaced
as a

unit
if
found defective.

The brake warning light serves
a
dual purpose.
It

functions
as an
indicator when
the
parking brake
is ap-

plied
and
also
if
there
is a
malfunction (loss
of
hydraulic

pressure)
in the
brake system. Switches which provide

the signal
to
operate
the
light
are
located
at the
parking

brake assembly
and at the
brake master cylinder
in the

hydraulic lines. Service
of the
brake pressure differ-

ential switch unit
is
covered
in
Section
5 of
this manual.

Regular maintenance
is not
required on
the
instrument

cluster
or its
components other than maintaining clean,

tight electrical connections, replacing defective parts

and keeping
the
speedometer properly lubricated.

SERVICE OPERATIONS

INSTRUMENT CLUSTER (Figs.
50
thru
53)

Removal
and
Installation

1.
Disconnect battery ground cable.

2.
Remove mast jacket lower support screws
at toe
pan.

3.
Remove mast jacket upper support bolts
and
allow

steering wheel
to
rest
on
seat cushion.

CAUTION: Both supports must
be
detached
to

prevent distortion
of
mast jacket.

4.
Remove cluster attaching screws from face
of
panel

and partially remove assembly from console opening.

5. Reaching behind cluster assembly, disconnect speed-

ometer cable, speed warning device
(if so
equipped
-

Fig.
51) and
chassis harness connector
at
rear
of

panel.

6. Remove assembly from console opening to
a
suitable

bench area
for
required service operations.

7.
To
install, reverse removal procedure.

INSTRUMENT CLUSTER LAMP REPLACEMENT

1.
Turn bulb holder counterclockwise
and
pull
out to

remove from
the
cluster housing.
2.
Pull bulb straight out
to
remove from socket.

3.
Press replacement bulb inward
to
lock
in
socket.

4.
Insert lamp assembly into housing, with lugs
on

holder entering notches
in
housing,
and
turn clock-

wise
to
lock
in
place.

PRINTED CIRCUIT REPLACEMENT

1.
Remove instrument cluster
as
previously described

in this section.

2.
Remove
all
cluster illuminating and indicator lamps

from housing.

3.
Remove fuel gauge terminal nuts
or
tachometer
re-

taining nuts securing printed circuit
to
housing.

4.
Remove four
hex
head screws retaining printed
cir-

cuit
to the
cluster housing
and
remove circuit from

housing.

5.
To
install, reverse removal procedure.

CAUTION:
The
retaining screws
are
part
of

the grounding circuit
and
must
be
installed
to

provide proper connections
for the
printed
eir-

cuit.

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-37

Fig.
50 - Instrument Cluster Installation — Camaro

FUEL GAUGE REPLACEMENT

1.
Remove instrument cluster assembly as previously

described.

2.
Remove cluster lamps from gauge cover plate,

ground screw and terminal nuts attaching printed

circuit to fuel gauge.

3.
Remove three screws retaining gauge assembly to

cluster housing.

4.
Carefully move printed circuit away from gauge and

remove gauge assembly from cluster housing.

5. Remove terminal nuts securing gauge to cover plate,

and detach gauge unit.

6. To install, reverse removal procedure.

TACHOMETER

NOTE:
The tachometer is a self-contained, all

transistor unit requiring very little service

other than keeping the terminal nuts clean and

tight. The unit is not serviceable and must be

replaced, if defective.

1.
Remove instrument cluster as previously described

in this section.

2.
Remove cluster lamps from rear of gauge cover and

disconnect harness wiring connections from gauge

terminals.

3.
Remove three screws retaining gauge to cluster

housing.

4.
Move printed circuit away from gauge area and re-

move gauge unit from housing.

5. Remove terminal nuts securing gauge to cover

detach unit.

6. To install, reverse removal procedure.

SEAT SEPARATOR INSTRUMENT CONSOLE

(Fig.
54)
(Fuel,
Ammeter, Temperature, Oil Pressure Gauges,

Low Fuel Warning Unit, and Clock)

1.
Disconnect battery ground cable.

2.
Remove clock shaft knob from face of cluster.

3.
Remove cover retaining screws (4) and cover from

cluster assembly.

NOTE:
Use an alien wrench to remove the two

screws located in the top of the cover below the

instrument console.

4.
Remove four screws retaining gauge mounting plate

to cluster housing.

5. Carefully disengage gauge plate from housing and

disconnect oil pipe and all electrical connections at

rear of gauges.

NOTE:
At this point, with gauge package re-

moval from housing all gauges including the low

fuel warning system may easily be serviced.

6. To install assembly, use reverse of removal

procedure.

OIL PRESSURE INDICATOR

If the light does not come on when the ignition switch

is turned on, or if the light comes on and remains on

after the engine is started, one or more of the following

conditions is indicated.

• Low oil pressure

• Defective wiring or switch

Sending Unit Replacement

1.
Disconnect wiring harness connector from sender

unit terminal (located in block above starter on L-6

engines and at left front of distributor on V-8

engines).

Fig.
51 - Speed Warning Device

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-44

WINDSHIELD WIPERS AND WASHERS

INDEX

Page

Wiper Transmission Assembly 12-44

Removal and Installation 12-44

Wiper Motor Assembly . 12-45

Removal and Installation . 12-45

Non-Depressed Park Wiper 12-46

Wiper Motor Assembly 12-47

Disassembly ....... 12-47

Inspection *...... 12-48

Assembly .. . .. . 12-48

Washer Pump Unit , 12-48

Removal and Installation 12-49

Disassembly and Assembly 12-49

Depressed Park 2-Speed Wiper - Chevrolet 12-49

Motor Section 12-51

WIPER TRANSMISSION ASSEMBLY

REMOVAL AND INSTALLATION (Fig. 59 and 60)

Chevrolet and Camaro

1.
Make certain motor is in park position, remove

wiper rod and blade assemblies from transmission

shaft.

2.
Remove plenum chamber ventilator grille.

3.
Loosen nuts retaining drive rod ball stud to crank

arm and detach drive rod from crank arm.

4.
Remove transmission retaining screws and lower

transmission and drive rod assemblies into plenum

chamber.

5. Remove transmission and linkage from plenum

chamber through cowl opening.

6. To install, reverse removal procedure.

Chevelle (Fig. 61)

1.
Make certain motor is in park position, remove

wiper arm and blade assemblies from transmission

shaft.
Gear Box Section . . 12-54

General Description. . . . , 12-56

Depressed Park 2-Speed Wiper - Corvette . 12-56

Service Operations

Wiper Trans-mission Assembly,

Removal and Installation . . ,

Wiper Motor Assembly ......

Motor Section .........

Gear Box Section

Washer Pump Section......

Pump Replacement ......
12-56

12-57

12-57

12-57

12-57

12-59

12-60

12-60

2.
Remove plenum chamber grille.

3.
Remove clip retaining transmission drive rod to

motor crank arm and detach drive rod from crank

arm.

4.
Remove transmission retaining screws, lower as-

sembly into plenum chamber, and remove unit from

chamber.

5. To install, reverse removal procedure.

Chevy II (Fig. 62)

1.
Make certain wiper motor is in park position, re-

move wiper arm and blade assembly from trans-

mission shaft.

2.
Remove special retainer clip securing transmission

linkage to wiper crank arm, remove linkage from

crank. Remove retainer clip securing left trans-

mission link to right transmission, remove link from

right transmission.

"
3. Remove two retaining screws securing transmission

Fig. 59 - Wiper and Motor Linkage—Chevrolet

Fig. 60 - Wiper and Motor Linkage—Camaro

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-46

Fig.
65 - Wiper Motor and Gear Box Assembly

1.

2.

3.

4.

5.

6.
Nut

Crank Arm

Seal Cap

Retaining Ring

Washer

Gear Box Cover
7.

8.

9.
Output Gear and

Shaft Assembly

Intermediate Gear

Wave Washer

10.
Gear Box Housing
11.
Brush Plate Assembly and

Mounting Brackets

12.
Brushes

13.
Wave Washers

14.
Flat Washers
15.
Armature

16.
Thrust Plug

17.
Frame and Field

18.
End Plate

19.
Tie Bolts (Two Required)

not install motor which has dropped or hung

from the drive link.

7.
Connect wiring and washer hoses to assembly.

8. Install plenum grille side cover (Chevrolet models

. only).

CheveKe (Fig, 61)

1.
Make certain motor is in park position.

2.
Disconnect washer hoses and all electrical

connectors.

3.
Remove three motor retaining bolts, carefully re-

move motor from firewall and detach clip retaining

wiper transmission drive arm to motor crank arm.

4.
To install, check sealing gaskets at motor and re-

taining bolts; replace as necessary.

5.
Attach motor crank arm to transmission rod and in-

stall clip. Position motor to cowl and install retain-

ing bolts.

CAUTION: Motor assembly must be in the

park position prior to installation to cowl. Do

not install motor which has dropped or hung

from the drive link.
6. Install washer hoses and electrical connections.

Chevy
II (Fig. 63)

1.
Make certain wiper motor is in park position.

2.
Working under instrument panel, remove special

retainer clip securing transmission linkage to motor

crank arm.

3.
Disconnect linkage, electrical connectors and washer

hoses.

4.
Remove three motor retaining bolts and remove

motor from opening cowl.

5.
To install, check sealing gaskets at motor and re-

taining bolts; replace as necessary.

6. Position motor to mounting location and install re-

taining bolts.

CAUTION: Motor assembly must be in the

.park position prior to installation to cowl. Do

not install motor which has dropped or hung

from the drive link.

7.
Attach crank arm to transmission rod and secure

with retaining clip.

8. Connect wiring harness and washer hoses.

NON-DEPRESSED PARK WIPER

CHEVELLE, CHEVY II AND CAMARO

The Type "E" two-speed electric windshield wiper

assembly (fig. 64) incorporates a non-depressed type

(blades park approximately 2" above windshield molding)

motor and gear train. The rectangular, 12 volt, com-

pound wound motor is coupled to a train consisting of a

helical drive gear at the end of the motor armature shaft,

an intermediate gear and pinion assembly, and an output
gear and shaft assembly. The crank arm is attached to

the output gear shaft.

Two switches, connected in parallel, control the start-

ing, stopping and parking of the Type "E" wiper motor.

The manually operated start, stop switch is located on

the instrument panel, while the cam operated park switch

is located in the wiper gear box.

CHEVROLET CHASSIS SEKV1CE MANUAL

ELECTRICAL-BODY
AND CHASSIS 12-48

NOTE:
Screws, nuts and lock washers for re-

assembling cover to wiper are contained in a

service repair package.

6. Remove output gear and shaft assembly, then slide

,
intermediate gear and pinion assembly off shaft.

7. If necessary, remove terminal board and park switch

assembly as follows:

a. Unsolder motor leads from terminals. Coding of

motor leads is not necessary on single-speed

wipers.

b.
Drill out rivets securing terminal board and park

switch ground strap to mounting plate.

NOTE:
Screws, nuts and washers for attaching

a replacement terminal board-park switch as-

sembly are included with the replacement

assembly.

Motor
(Fig. 65)

1.
Follow Steps 1 through 7b under gear box

disassembly.

2.
Remove, motor through bolts, tap motor frame

lightly, and remove motor from mounting plate.

3.
Remove brush spring tension (fig. 68), slide arma-

ture and end plate from motor frame. Pull end

plate from armature.

NOTE:
Thrust plug located between armature

shaft and end plate.

4.
Remove end play adjusting washers from armature,

noting arrangement for proper reinstallation.

INSPECTION

Check and inspect all parts for serviceability, replace

as necessary. All parts can be replaced individually

except motor frame and field, which is serviced as an

assembly. Service kits also provide screws, nuts and

washers to replace gear cpver and terminal board rivets.
ASSEMBLY

Refer to Figure 65 for exploded view of motor and gear

train.

Motor

Reassemble motor using reverse of disassembly

procedures.

NOTE:
Armature end play is controlled by end

play washers. See Figure 69 for proper assem-

bly of end play washers. Lubricate armature

shaft bushings with light machine oil.

Gear Box

1.
Assemble gear box using reverse of disassembly

procedure.

NOTE:
Lubricate gear teeth with Delco Cam

and Ball Bearing lubricant or equivalent. Be

sure cover is properly located over dowel pins

and be sure to reinstall ground strap.

2.
Place wiper in park position and install crank arm

on output shaft, rotate crank so alignment marks line

up with those on cover (fig. 70).

3.
Replace retaining nut, place crank arm in vise,

tighten retaining nut.

WINDSHIELD
WASHER PUMP

The windshield washer pump used on the 2-speed Type

"E"
wiper motor assembly is a positive displacement

type pump employing a small bellows, bellows spring and

valve arrangement. The pumping mechanism is actuated

by a four lobe cam and driven directly by the wiper motor

(fig. 71). Thus, when the wiper is operated, this rotor is

always turning with the gear. Programming is accom-

plished electrically and mechanically by a relay assembly

and ratchet wheel arrangement.

GEAR
CASE GROOVES

r— CRANK ARM GROOVES

WASHER PUMP
Ha

ACTUATOR
IB

•
^^HTS4LOBE

•MMBW
CAM

Fig.
70 - Wiper Crank Arm in Park Position
Fig.
71 - Wash Pump Drive Cam and Actuator

CHEVROLET
CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-49

BELLOWS
AND

SPRING
HOUSING
COIL
AND
POLE

ASSEMBLY

VALVE

ASSEMBLY
RATCHET

PAWL

ASSEMBLY

RATCHET

WHEEL

ACTUATOR
PLUNGER
ARM

ACTUATOR
PIN
HOLDING CONTACTS
OPEN

RAMP TANG

PLUNGER
ARM

Fig.
73 -
Releasing
Pump from
Lockout Position

Fig.
72 -
Washer
Pump
Mechanism

REMOVAL AND INSTALLATION

Removal of the washer pump from the wiper motor

consists of:

1.
Disconnect wiring harness and washer hoses from

washer.

2.
Remove the two pump-to-wiper retaining screws and

remove washer from wiper (fig. 66).

3.
Reverse removal procedure to install assembly.

DISASSEMBLY-ASSEMBLY

Refer to Figure

1.
Remove washer pump cover.

2.
Relay

a. To remove relay unsolder coil leads from

terminals.

NOTE:
No coil polarity is necessary when re-

soldering coil leads.

b.
Remove coil retainer clip and slip coil assembly

out of mounting bracket.

3.
Ratchet Pawl

a. To remove ratchet pawl disengage spring from

ratchet pawl and slide ratchet pawl from shaft.
CAUTION: Be sure spring is properly assem-

bled before replacing washer pump cover.

Terminal Board

a. Remove terminal board attaching screws, ratchet

dog and board from washer base.

Ratchet Wheel

a. Remove lock ring from shaft.

b.
Slide ratchet wheel from shaft.

Valve Assembly

a. To remove valve assembly remove screws that

secure valve assembly to bellows housing.

CAUTION: It may be necessary to carefully

pry bellows lip out of the valve body groove.

Bellows

a. To remove bellows first remove valve assembly.

b.
Manually operate pump clockwise to release pump

from 'lock-out" position (fig, 73).

c. Hold bellows plunger arm from moving, then push

in against bottom of bellows with thumb and twist

bellows spring from housing.

Actuator Pin

a. Remove actuator pin retaining spring and slide

pin from washer base.

Reverse disassembly procedure to assemble washer.

DEPRESSED PARK 2-SPEED WIPER

CHEVROLET

GENERAL DESCRIPTION

The Type "C" two speed electric wiper assembly (fig.

74) incorporates a depressed park type (blades park

against windshield lower molding when the motor is

turned off) motor and gear train. The wiper has a com-

pound wound 12 volt motor and a gear box section con-

taining the gear mechanism and relay control. The motor

armature is fitted with a worm gear which drives the

main gear assembly and crank arm.

The relay control, consisting of a relay coil, relay

armature and switch assembly, is located in the gear box
section bid controls the starting and stopping of the wiper

through a latching mechanism (fig. 75).

An electric washer pump is mounted on the gear box

section of the wiper and is driven by the wiper unit gear

assembly (fig* 75).

The overhaul procedures for the wiper are broken down

into three major areas: The motor section, gear box

section and washer pump section. Each section maybe

serviced independently of the other.

CHEVROLET CHASSIS SEftVKX