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Windshield Wiper Motor
Removal, Disassembly & Reassembly |
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This information is being supplied by
Jim Lundal. The windshield wipers were performing
intermittently on my 1956 Chev and it was decided that the motor
would be removed and checked on the work bench. Removal is
a simple operation: A single wire is "usually" connected to the
ballast resistor on the firewall. Disconnect this wire.
Remove the "Bowden" cable connection on the motor. Remove
the two mounting screws on the firewall mount securing the motor
to the firewall. The motor will simply be free to remove.
The picture below is the Wiper Motor
Assembly. This motor design is used on many of the 50's
Chevy's and the design is very similar to the unit installed on
my 1960 Corvette. Internally, the units will have minor
differences but operationally are very close.
The information supplied here was
located after "getting into trouble" during disassembly. I
could not find this information in any mid-50's Auto manuals
until I happened upon a Corvette Servicing Guide which is
a general guide to servicing Corvettes, '53 - '62. The
subsequent information was invaluable for disassembly and
reassembly. |
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The picture above is the configuration
of many Chevy Wiper Motors. A single wire is connected to
the one end of the ballast resistor supplying the 12V to the
wiper motor. The bowden cable is the connection between
the dashboard control knob and the slide mechanism on the motor.
The cylindrical end of the motor is, "the motor" containing the
field coils, motor armature and the brushes. "Your best
bet is to Leave the motor end" of the Wiper intact and not
remove it. Most servicing can be done removing two access
plates and checking the switches and cleaning and lubricating
the gearing. IF the motor was suspected to be a problem,
then remove the motor housing. |
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All of the Wiper Assembly gearing can
be removed as described in this information. The motor
armature worm gear is visible in Figure 3 above and the worm is
the shaft of the armature and can remain for cleaning. The
complete drive gearing can be removed and cleaned, and relubed.
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The following picture , Figure 13,
indicates one of the hints that is Extremely helpful if the
armature is removed. It is recommended that work on
the electrical switch access area and the gear assembly be done
without removing the electrical motor. Once the
cylindrical motor cover is removed, more than likely, the motor
armature will stay in the gearing and you will need the hint in
Figure 13 to reassembly the armature inside the housing.
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