1935 Cadillac - GM Heritage Center

91
ELECTRICAL SYSTEM
Projector and power unit not properly matched
—The short projector should be installed on the
power unit marked "S" on the cover facing the
front of the car. The long projector should be
installed on the power unit marked "L."
In most cases a defect in the tone can be corrected
by checking the above points. If not, the
air gap between the armature and the field should
be checked as a last resort. This gap requires
extremely accurate setting and should not be
touched until all other possibilities have been
exhausted.
If the air gap is out of adjustment, it should be
set within .003 in. of parallel and to the following
limits:
Low note
High note
045 to .050 in.
036 to .040 in.
11. Removal and Installation of Distributor
Drive Shaft
When the distributor drive shaft and gear are
removed and reinstalled on Cadillac cars, particular
care must be exercised to get the driven
gear meshed with the camshaft gear in the proper
position, otherwise it will not be possible to time
the engine correctly. To install a distributor drive
shaft, first turn the crankshaft to the firing center
(not dead center) for No. 1 cylinder. Then mesh
the distributor driven gear with the driving gear
on the camshaft so that the slot in the upper end
of the distributor shaft is offset towards the rear
of the engine. In other words, the narrow part of
the shaft at the side of the slot should be at the
rear on all 8- and 12-cylinder engines. When
installing the distributor drive mechanism on the
8-cylinder engine, care should also be exercised
to line up the oil pump shaft so that the driving
shaft will drop into position without damaging
the oil pump by pushing the pump shaft down
through the pump cover. The fuel pump should
also be removed before removing the distributor
drive mechanism to eliminate interference between
the fuel pump drive shaft and the distributor
drive shaft.
12. Correcting Starter Solenoid Difficulties
The solenoid starter used on current model
Cadillac and LaSalle cars is so designed that after
the generator is charging, there is no possibility
of the starter engaging should the button on
the instrument panel be accidentally depressed.
The generator is not charging, however, until the
idling speed is sufficient to operate the cut-out
relay. To avoid any possibility of the starter
engaging while the engine is running, the idling
speed should be kept high enough to keep the
ammeter indicating on the "Charge" side.
Switch
7 M" F«rrol«
Fig. 21. In case of automatic engagement of the
starter switch the points indicated should be investigated
in the switch assembly
In case the starter engages as soon as the
ignition is turned on, the following causes should
be investigated and corrected as necessary.
The bracket (Fig. 21) holding the push button
switch behind the instrument panel may be bent
out of position, closing the circuit without the
instrument panel button being depressed.
The instrument panel button may bind in its
ferrule.
If the bracket is bent inward, bringing pressure
to close the switch, it should be bent outward to
line up the switch and the instrument panel
button. If it is bent outward out of line, it may
cause either the switch or the instrument panel
button to bind.
The first step in correcting binding in the switch
or instrument panel button is to find the actual
cause. If the bracket is bent outward, to close
the switch, the instrument panel button may have
to be pushed in far enough for the taper of the
button to bind on its ferrule, or may result in
the switch being pushed at an angle and binding
in the switch housing. The remedy is to line up
the switch and button by bending the bracket into
its proper position.
If the travel of the button is too great, the ferrule
may be chamfered out to prevent binding. The
switch should be inspected to make sure that it
operates freely and that it is depressed not more
than enough to prevent rattle while the instrument
panel button is in the fully released position. If
it is unduly depressed and is not out of alignment,
it may be necessary to grind down the end of the
instrument panel button. The end of the button
rod should extend out not more than ^¾- in. as
measured from the face of the rod to the center of
the hole for the cotter pin.
The only possibility of the starter engaging
while the generator is charging is a ground in the
No. 14 black wire from the starter switch to the
relay. Such a ground may result if the relay cover
is struck a blow hard enough to drive the edge
of the cover through the insulation around the
black wire terminal port, or if the wire is grounded
anywhere in its harness.