ELECTRONICS GP-ENGINE RATINGS 1983338 - Caterpillar

Keeping the starting engine fuel tank filled with prevent condensation in the tank. Periodically drain any water which may have accumulated in the starting engine fuel tank sediment bowl. Check the carburetor for proper adjustment every 500 service hours. Carburetor Adjustment: To obtain an approximate carburetor adjustment, turn the adjusting screws gently against their seats. Then back off the high speed mixture adjusting screw (3) one turn from the closed position and the low speed mixture adjusting screw (1) one half turn from the closed position.
CARBURETOR ADJUSTMENT
1-Low speed mixture adjusting screw. 2-Idling speed control screw. 3-High speed mixture adjusting screw.A more accurate adjustment can be obtained while the engine is running at full governed speed by turning the high speed mixture adjusting screw out to make the mixture richer or in to make it leaner. Adjust this screw to a point that will give the greatest amount of power with a clear exhaust. Turn the low speed mixture adjusting screw until the engine idles regularly at slow speed without emitting black smoke from the exhaust. Turn this screw out to make the mixture richer or in to make it leaner. Turn the idling speed control screw (2) to the left (out) to decrease idling speed or to the right (in) to increase the speed. Sediment Bowl Filter: The sediment bowl (1) collects water and sediment that may be in the fuel. To remove the collected water and sediment, close the valve (2) under the fuel tank and remove the bowl by unscrewing the nut (4) that clamps it to the body of the valve. Unscrew the edge-type filter (5) and shake it in kerosene or some non-flammable cleaning fluid. When the bowl is replaced see that the gasket (3) is clean, is in the correct position, and is not broken.
STARTING ENGINE SEDIMENT BOWL FILTER
1-Sediment bowl. 2-Valve. 3-Gasket. 4-Nut. 5-Edge-type filter element.