7740680_023 Volvo.Penta Engine suspension

Idling
Electronic engines are shipped from Caterpillar with the idle speed preset to 600 rpm. Idle speed is adjustable on Caterpillar Electronic Truck Engines. Avoid excess idling. If the truck is parked for more than five minutes, STOP the engine. An engine can burn from 2.8 to 5.7 L (.7 to 1.5 US gal) of fuel per hour while idling. Excessive idling can cause excessive carbon build-up and/or slobber, which is harmful to the engine.If extended idle time is required, control the engine speed to 1000 rpm or greater and take steps to ensure that the coolant temperature exceeds 82°C (180°F). Contact your Caterpillar dealer for assistance.Idle Shutdown Timer
The idle shutdown timer can be programmed to shut the engine down after a specific engine idling time.To override the idle timer:1. Program the ALLOW IDLE SHUTDOWN OVERRIDE to YES.2. The CHECK ENGINE/DIAGNOSTIC (YELLOW) lamp will flash rapidly 90 seconds prior to shutdown. Depress the service brake or clutch pedal during the 90 seconds, after the YELLOW lamp begins to flash.The idle shutdown timer will automatically reset to the programmed value if the truck is moved a short distance.Cold Mode Operation
Caterpillar truck engines do not require long warm-up times that waste fuel. It takes just a few minutes in the summer and a bit longer in the winter to warm up the engine.A load can be applied to the engine after normal oil pressure is achieved and the coolant water temperature gauge begins to rise. These engines use a cold start strategy that limits power until the coolant temperature reaches 18°C (64°F), or until the engine has been running for 12 minutes. The electronic system automatically idles the engine at 600 rpm during cold mode operation.Getting Started
Use progressive shifting techniques. Progressive shifting improves fuel economy.* Keep engine rpm to a minimum [low to mid rpm range (1200 to 1600 rpm)]* Use only enough rpm to pick up the next gearProgressive shifting also reduces acceleration time. Top gear is reached sooner because it takes less time to synchronize gears during shifting and the engine is operating at its highest torque range. Experience with your truck will show you how much rpm is required to make upshifts under various conditions. These engines may be programmed to encourage progressive shifting. If acceleration rates slow dramatically when certain speeds (rpm) are reached while driving in the lower gears, shift parameters have been programmed into the ECM. Shift parameters will limit rpm while driving in higher gears. These parameters are protected by customer passwords.Cruising
The faster a truck is driven, the more fuel it will consume. Increasing cruising speed from 88 to 104 km/h (55 to 65 mph) will increase fuel consumption of a typical Class 8 truck approximately 0.4 km/L (1 mpg). Driving faster to increase stop time makes those stops very expensive. Cruising time provides the greatest opportunity to benefit from operation in the most efficient rpm range of the engine (1200 to 1600 rpm).These engines can be equipped with:* Cruise Control* Auto Retarder in Cruise* Auto Retarder in Cruise Med/Hi IncrementCruise Control
Depending on truck manufacturer, the cruise control switch may be programmed to operate in one of two modes:1. The SET position may operate as SET/ACCEL or SET/DECEL.2. The RESUME position may operate as RESUME/ACCEL or RESUME/DECEL.Refer to the markings on the switch or your Truck Owners Manual. To set the Cruise Control:1. After you accelerate to the desired speed, turn the ON/OFF switch ON.2. Press the SET/RESUME switch to the SET position.The ECM will control truck speed until the clutch or service brake pedal is depressed or the ON/OFF switch is turned OFF. You can also accelerate to desired speed and set the cruise control by pressing the SET/RESUME switch to the ACCEL position. To resume speed after an after an interruption:* Press RESUME and the truck will return to the "set" speed.Momentarily pressing or "bumping" the SET/RESUME switch to the ACCEL position will increase vehicle speed by one mph. Press the switch to the DECEL position to decrease speed by one mph. The operating range of the cruise control has been programmed into the ECM.SoftCruise Control
SoftCruise provides an eight km/h (five mph) operating range around the cruise control setting. Engines are shipped from Caterpillar programmed to operate in the SoftCruise mode. SoftCruise allows the truck to accelerate slightly, under power, going down hills and get a "run" at the next hill. Improved fuel economy can be gained in this mode.When the SoftCruise control is deactivated, the SET speed is maintained. Contact your Caterpillar dealer for more information.Engine Retarder
The antilock braking system (ABS) of this vehicle may interrupt the operation of the engine retarder(s) during the ABS actuation. The engine retarder(s) are a BrakeSaver or a compression brake, and/or an exhaust brake. Refer to the literature of the vehicle manufacturer regarding the operation of the ABS.Engine retarders and exhaust type retarders generate maximum retarding power at the engine's maximum rated rpm. As the engine rpm decreases, so does the retarder performance. For maximum available retarding, operators should select a gear which will provide the desired road speed at the highest allowable engine rpm.On long downhill grades, an operator should establish a "control speed". The "control speed" is the speed at which the force that pushes the truck is equal to the retarding force that slows the truck, with little or no use of the service brake.To maximize the benefit of the retarder, the retarder should be used anytime that the operator wants to slow the truck. Retarders should be left in the ON position during all normal operating conditions.The operation of any vehicle under slippery conditions requires caution. This is also true when operating a truck retarder. As a general rule, start with the retarder OFF and ensure that the truck maintains control through natural retardation. Then activate the retarder at the lowest power setting and increase the power setting as the conditions allow.The engine retarder may be programmed to one of these three modes:* COAST* LATCH* MANUALCoast Mode
If the engine