1928 Cadillac - GM Heritage Center

CADILLAC OPERATOR'S MANUAL
EQUIPMENT j 9 2 S C/1D/AMC
33
On cars driven at high speeds, the front tires should be inflated to 50 lbs.
This is important.
Tire Air Compressor
To use the tire air compressor with which the car is equipped, proceed
as follows:
Turn back the left-hand side of the front carpet and lift the small ovalshaped
cover which is in the floor, just to the left of the transmission control
lever. Reach through the hole in the floor and remove the knurled
cap from the connection on top of the compressor. Connect one end of the
air hose (in the tool equipment) to this connection and at the other end
of the hose to the valve of the tire to be inflated. Do not connect the hose
to the tire first, if there is pressure in the tire.
The control shaft, by which the compressor driving gear is placed in
mesh with the transmission gears, projects through a small hole in the
floor, just in front of the large hole over the compressor. To start the compressor,
if the engine is running, disengage the clutch and hold the pedal
down until the transmission gears have ceased to revolve. Then, with a
screw-driver, turn the slotted head of the compressor control shaft clockwise.
If the engine is not running, simply turn the control shaft clockwise,
without disengaging the clutch and then start the engine.
The compressor gives best results when the engine runs at a speed of
approximately 1000 r.p.m., which is about three times the normal speed
of the engine when idling. Do not race the engine in operating the compressor,
or, for that matter, at any other time when it is not driving the
car. Racing the engine beyond the
recommended speed not only decreases
the efficiency of the compressor,
but is one of the worst
forms of abuse. To stop the compressor,
turn the control shaft counter-clockwise.
Do not turn the compressor control
shaft to start the compressor
when the engine is running and the
clutch is engaged.
rim has on it three lugs, which are located so as to engage with notches
on the support arms and on the adjustable clamps. There are two sets of
these notches in the support arms.
When two rims are carried, the rim nearest the car should be placed so
that the side with the lugs is away from the car, and the lugs should be
inserted in the inner set of notches. The outer rim should then be placed
so that the side with the lugs faces toward the car and the lugs of this rim
should be inserted in the outer set of notches.
When onlv one rim is carried, the side of the rim with the lugs should
lace awav from the car, and the lugs should be inserted in the outer set
of notches. This permits the rim to be clamped by the outer clamp.
The lock is' in the upper end of the outer clamp screw and is protected
hv a dust cap, which must be unscrewed to insert the key. Turning the key
clockwise disengages the lock, permitting the clamp screw to be turned.
To lock the outer clamp, screw the clamp down firmly against the rim
or rims. Adjust the clamp screw handle so that it points squarelv across
the car. Then turn the key counter-clockwise. Care should be exercised
in removing or replacing a spare tire not to strike the body of the car.
NOTE: If a wrap-around type tire cover is used, it should have slots
cut in it opposite the two upper lugs on the rim, so as to permit these
lugs to seat in the notches in the support arms.
Wire Wheel Carrier
To remove the spare wire wheel from the carrier, first unscrew the dust
cap which protects the lock. Insert the key in the lock and turn it to the
Tire Carrier
The tire carrier is designed to carry
Figun 17. The spare rini and tire can be ei tne r one or two standard-size tires
removed after unlockine ;r.e clamp and un- . . . ,
screwing it. ' mounted on rims and inflated, .bach
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