1967 CHEVROLET CAMARO electrical

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 12-47

1

1

Fig.
66 - Washer Pump - Attach Screws

WIPER MOTOR ASSEMBLY

DISASSEMBLY

Gear Box (Fig. 65}

1.
For wipers equipped with a washer pump, remove

the two washer pump mounting screws (fig. 66) and

lift pump off washer.

2.
Remove washer pump drive cam as required (fig.

67).
The cam is pressed on the shaft but can be

4-LOBE CAM

WASHER PUMP DRIVE

(PRESS FIT)
BRUSH HOLDER

REMOVE BRUSH SPRING FROM SLOT

AND PUCE IT IN GROOVE ASSHOWN

Fig.
68 - Releasing Brush Spring Tension

wedged off by using two screw drivers between cam

and plate.

3.
Clamp crank arm in a vise and remove crank arm

retaining nut.

CAUTION: Failure to clamp crank arm may

result in stripping of wiper gears*.

4.
Remove crank arm, seal cap, Tru-Arc retaining

ring, and end-play washers.

NOTE:
Seal cap should be cleaned and re-

packed with a water-proof type grease before

reassembly.

5. Drill out gear box cover retaining rivets, remove

cover from gear train.

Fig.
67 - Washer Pump Drive Cam
Fig.
69- End Play Wave Washer Installation

CHEVROLET CHASSIS SERVICE 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

ELECTRICAL-BODY AND CHASSIS 12-50

SERVICE OPERATIONS

MOTOR SECTION

DISASSEMBLY

NOTE:
Motor section
may be
disassembled

independently
of
the gear box.

Brush Plate and Circuit Breaker Removal

1.
Scribe
a
reference line along the side of the casting

and end cap to insure proper re-assembly.

2.
Remove the two motor thru bolts.

3.
Feed exposed excess length
of
motor leads thru the

casting grommet
and
carefully back
the
case
and

field assembly plus
the
armature away from
the

casting (fig. 76).

NOTE:
It may be
necessary
to
remove
the

armature end play adjusting screw and insert
a

rod thru
the
opening
in
order to apply pressure

against the end of the armature.

4.
Unsolder
the
black lead from circuit breaker
(fig.

77).

5.
Straighten
out the 4
tabs that secure the brush plate

to the field coil retainers (fig. 77).

CAUTION:
Be
careful
not to
break
any of
the

retainer tabs.

6. Install
"U"
shaped brush retainer clip over brush

holder that has brush lead attached to circuit breaker

(fig. 78).

7.
Holding
the
opposite brush from that retained in Step

6, carefully lift
the
brush holder
off the
mounting

tabs
far
enough
to
clear
the
armature commutator

(fig. 78).

8. Allow
the
brush, held
in
Step
7, to
move out
of its

holder. Remove
the
brush spring
and
lift the brush

holder
off
the armature shaft.

Armature Removal

1.
Follow Steps
1
thru
8
under brush plate removal.

2.
Lift armature out
of
case and field assembly.

3.
Remove thrust ball from
end of
armature shaft
as
PUMP

ASSEMBLY

CAM SLOT

DRIVE PLATE
AND

ASSEMBLY

RELAY SWITCH

ASSEMBLY
WASHER PUMP

DRIVE
PIN

Fig.
75
-
Wiper and Washer
Pump
Mechanism

required and save
for
reassembly.

NOTE: Thrust ball
may be
easily removed

with
a
magnet.

MOUNTING

GROMMET

WASHER PUMP COVER

RETAINING RING

STAKE MARKS -

CASE
TO
FIELD

LAMINA
(4
PLACES)

Fig. 74 - Depressed Park 2-Speed Wiper
Fig. 76 - Wiper Motor Separation

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY
AND
CHASSIS
12-51

7^5

CUT MOTOR LEADS

GENERALAREA
FOR

in|i

BRUSH PLATE
ASSEMBIYI^^H

RETAINER TAB (4)__J^^H

BLACK
LEAD
TO §HH

CIRCUIT BREAKER»^^—

CIRCUIT
F^H^^^^^B

BREAKER)
^^SH^P
IN
THIS
m

•I
i
ii
ii ii H^MWii^A'

I^BRT^i"
BRUSH

•^^k RETAINER CLIP

•
SPUCENOTES:

•
1-SOLID
BLACK
TO

•
SHUNT FIELD COIL

5
2-SERIES
FIELD COIL

I
TO
BLACK WITH PINK

H STRIPE LEAD

w

Fig.
77
-
Circuit Breaker

Case and Field Assembly Removal

1.
Remove brush plate and armature.

2.
The end
case
and
field assembly
is
serviced
as
a
DRIVE PLATE
&*

ASSEMBLY

DRIVE PAWL
IN

PARK POSITION
IN

RELAY SWITCH SLOT

RELAY SWITCH ASSEMBLY

Fig.
79-
Drive Pawl
in
Full Park Position

unit.
To
free
the
field
and
case assembly,
cut the

solid black and black with pink stripe leads
in a
lo-

cation convenient
for
splicing
-
preferably near
the

wiper terminal board. Refer to Figure
76.

Remove steel thrust plate and rubber disc from case

bearing
as
required.

DRIVE
PAWL

ENGAGING

LATCH
ARM

Fig.
78
-
Removing Brush Holder
Fig.
80
-
Relay Assembly

CHEVROLET
CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-52

GEAR MECHANISM

NOT IN PARK

RELAY SWITCH ATTACHING SCREW

Fig.
81 -
Drive Gear not
in
Park Position

TERMINAL BOARD

1 2 3

RELAY LEADS (RED)

SOLDER TO NO. 1 TERMINAL

RELAY
COIL-RED

TAN-SOLDER TO

SAME RELAY SWITCH TERMINAL WITH RED COIL LEAD

BLACK WITH PINK STRIPE
ASSEMBLY

1.
If new field and case assembly is being installed,

splice the black and black with pink stripe leads of

the new field with the corresponding leads of the

wiper.

2.
Install the rubber thrust disc, steel thrust disc and

felt lubricating washer in the case assembly bearing

in the order indicated.

3.
Lubricate end of armature shaft that fits in case

bearing. Next, install thrust ball in end of shaft.

4.
Assemble armature in the case and field assembly.

5.
Position the partially assembled brush plate over the

armature shaft far enough to allow re-assembly of

the remaining brush in its brush holder;- then position

the brush plate assembly on the mounting tabs in the

position shown in Figure 78.

NOTE: Circuit breaker ground lead will not

reach circuit breaker terminal if brush plate is

positioned wrong.

6. Center the brush plate mounting holes over the

mounting tabs and bend the tabs toward the brush

holders as required to secure the brush plate in

position.

CAUTION: Be sure tabs are centered in brush

plate mounting holes.

7.
Remove brush retainer clips and resolder circuit

breaker ground lead to circuit breaker. Refer to

Figure

8. If new case and field assembly'is used, scribe a line

on it in the same location as the one scribed on the

old case. This will insure proper alignment of the

new case with the scribed line made on the housing

(Step
1
under Brush Plate Removal).

9. Position armature worm shaft inside the housing and,

using the scribed reference marks, line up as near

Fig.
82 - Relay Assembly Wiring
Fig.
83 -
Terminal Board Resistor

CHEVROLET CHASSIS SERVICE MANUAL

ELECTRICAL-BODY AND CHASSIS 12-53

13

10 11

Fig.
84- Drive Gear Mechanism Assembly

1.
Drive Gear Shaft

2.
Drive Pawl

3. Lock Pawl

4.
Coil Spring
5. Drive Gear

6. Relay Assembly

7. Spacer
8. Shield

9. Seal

10.
Washer
11.
Snap Ring

12.
Crank Arm

13.
Nut

10.

1

NOTE:

VIEW SHOWS RELAY SWITCH ASSEMBLY

AND TERMINAL BOARD REMOVED.

GEAR MAY BE REMOVED WITHOUT

DISTURBING RELAY SWITCH

OR TERMINAL BOARD. f* ;<^ / t

\ MAINTAIN GEAR

J ASSEMBLY IN

V POSITION

^^ SHOWN

FT"
DURING

* & REASSEMBLY

WM IN HOUSING

f

INNER SPACER

J WASHER

ft
as possible the case and field assembly with the

housing.

Maintaining the armature in its assembled position

in the case, start the armature worm shaft through

the field and housing bearing until it starts to mesh

with the worm gear. At the same time carefully pull

the excess black and black with pink stripe leads

thru the housing grommet.

DRIVE

PAWL
DRIVE SHAFT AND

PLATE ASSEMBLY

LOCK

PAWL

Fig.
85 - Removing Gear Assembly
Fig.
86 - Lock and Drive Pawl Assembly

CHEVROLET CHASSIS SERVICE MANUAL