3861722 Volvo.Penta Fuel hose

Start vehicle in motion by utilizing the lowest gear speed in the transmission that will enable the engine to easily start the load without slipping the clutch. Accelerate smoothly and evenly to engine rated speed. Rapid depression of accelerator will result in high fuel consumption with no increase in vehicle performance. Engine speeds given for transmission shift are approximate and will vary depending on the transmission used.Upshift to the next higher gear speed. If properly done, the engine speed will be above approximately 80% of rated RPM when the load is applied. For best performance when loaded, do not skip gears. Engine speed should not be permitted to drop appreciably below 80% of rated RPM to avoid a lugging condition.Caterpillar engines have good lugging characteristics; however, operating in a lug condition for extended periods of time should be avoided as it causes exhaust temperatures to rise and also results in high fuel consumption. A lug condition exists when an increase in engine speed cannot be achieved with an increase in accelerator pedal position, or when engine speed decreases with the accelerator pedal in its maximum position. A lug condition can exist at any engine speed below full load speed. Continue to make successive upshifts through each gear speed in the transmission until cruising speed is reached. In each gear speed, accelerate smoothly to approximately rated RPM before upshifting to the next gear. For highway cruising, maintain the engine speed between 100 to 200 RPM below rated RPM. Operating in this range will give maximum fuel economy.When going up a grade and the engine speed drops below approximately 80% of rated RPM, downshift successively until a gear speed is reached that will enable the engine to pull the load without operating in a lug condition. When pulling a long grade, such as encountered in mountain driving, make additional downshifts of one or two gears immediately prior to reaching the summit. This will allow the engine to cool more slowly than if the load on the engine is suddenly changed from a full load condition going uphill to no load condition going downhill. Prevent overspeeding of the engine when going down long, steep grades. Downshift to a gear speed that will permit a desired vehicle speed with an engine speed not in excess of high idle RPM.Periodic braking of the vehicle may be required to help slow the engine speed in severe conditions.Engine Shut Down
Before stopping the engine, operate at low load for 5 minutes, then at low idle for 30 seconds. (This procedure allows hot areas in the engine to cool gradually, extending the engine life.) TO STOP THE ENGINE, DO ONE OF THE FOLLOWING, DEPENDING ON TRUCK ARRANGEMENT. Make sure the shut-off procedure is understood. Refer to the truck manufacturer's instructions for the shut-off system used.1. Turn the key to the spring-loaded position and hold until engine stops, then release key, or2. Pull out the manual shut-off control, or3. Push in and hold stop button until engine stops, then release button.