1917 Cadillac - GM Heritage Center

32 OPERATION AND GENERAL CARE
SETTLING CHAMBERS AND STRAINERS IN THE GASO­
LINE SYSTEM
There arc two settling chambers in the gasoline system, one at the under
side of the gasoline tank and the other attached to the left hand side of the
frame of the car just under the front floor boards.
There is a drain plug at the bottom of each of these settling chambers.
Every one thousand miles or oftener the plug in the settling chamber under
the floor boards should be removed and the plug in the settling chamber
underneath the gasoline tank should be unscrewed several turns, to drain
the settling chambers of any dirt or water which has accumulated.
Before unscrewing either of the plugs the gasoline system should be
relieved of all air pressure by removing the gasoline filler cap on the tank.
There are two strainers in the gasoline system which require cleaning
periodically—one at the point where the gasoline feed pipe is attached
to the carburetor, and the other attached to the drain plug in the settling chamber
under the front floor boards. (See Fig. 16.)
The strainers should be removed and cleaned every one thousand miles
or oftener. Shut off the gasoline at the tank before removing either strainer.
In cold weather it may be found necessary to remove the strainers more frequently
in order to prevent an accumulation of water at these points which
would freeze and prevent gasoline from flowing to the carburetor.
SPEEDOMETER
The speedometer on the instrument board registers on its three dials
the rate at which the car is traveling, the total number of miles traveled by
the car and a trip reading which may be reset to zero. The total mileage
dial cannot be reset.
PART II
LUBRICATION
CAUTION
Do not under any circumstances attempt to lubricate the speedometer
head. Any parts requiring lubrication were amply supplied with lubricant
before they were assembled.
A repair man should never be allowed to attempt to adjust or repair the
speedometer head. Repairs or adjustments are impossible without a special
calibrating machine. The guarantee on the speedometer head does not hold
good if the head is disassembled or tampered with.
If the speedometer head is removed for any reason, handle it as you would
a fine watch. The speedometer head may very easily be damaged by rough
handling.
If a new glass is necessary, or repairs or adjustments, remove the speedometer
head, pack it carefully, and return it to the makers or one of their
service stations or branches.
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